第六届中国格点量子色动力学研讨会

→ Asia/Shanghai
Description

强相互作用的非微扰性质是标准模型中尚待解决的重大理论疑难。作为从第一性原理出发的非微扰方法,格点QCD能够依托超大规模数值模拟对这些非微扰性质进行理论计算,并与实验结果相互印证。中国于20世纪80年代初开始格点QCD研究,并于2005年成立了中国格点QCD合作组(CLQCD)。经过多年发展和近期众多优秀青年研究人员的加盟,同时借助超级计算机技术的迅猛进步,中国的格点QCD合作组近年来已产生了一套系统的动力学组态,并具备了在强子能谱、核子结构、QCD相结构和标准模型精细检验等方向探索国际前沿问题的能力。

自2021年起,本系列会议在国内外同行的支持下先后在华南师范大学、上海交通大学/李政道研究所、北京大学、湖南师范大学及中国科学院近代物理研究所惠州研究部举办。“第六届中国格点量子色动力学研讨会”将于2026年10月8日-10月11日在广东深圳举办(10月8日报到),由香港中文大学(深圳)承办。

研讨会诚邀相关领域专家共同探讨粒子物理、核物理中的重要前沿问题,交流基于国产超算的格点QCD软件开发进展,推动格点QCD及其相关领域的合作和协同发展。会议得到了国家自然科学基金委重大项目《基于国产超算的格点量子色动力学关键科学问题研究》和香港中文大学(深圳)理工学院的资助。

会议注册:

  • 会议注册截止时间:2026年9月15日
  • 会议地点:香港中文大学(深圳) (‌广东省深圳市龙岗区龙翔大道2001号)
  • 会议住宿:深圳市中海凯骊酒店(广东省深圳市龙岗区大运路168号)
  • 会议注册费:教师/博士后1500元/人,学生800元/人

会议组委会:

  • 中国格点QCD合作组

会务联系人:

  • 张建辉:zhangjianhui@cuhk.edu.cn
  • 周凯:zhoukai@cuhk.edu.cn
  • 赵殿君:zhaodianjun@cuhk.edu.cn
  • 廖颖慧(会务秘书):liaoyinghui@cuhk.edu.cn

历届会议:

第一届 https://indico.ihep.ac.cn/event/11403/

第二届 https://indico-tdli.sjtu.edu.cn/event/1198/

第三届 https://indico.ihep.ac.cn/event/19002/

第四届 https://indico.ihep.ac.cn/event/22108/

第五届 https://indico.itp.ac.cn/event/324/

Participants
  • Bolin Li
  • Chenyu Zhang
  • Chuanyang Li
  • chujie yang
  • chunhua zeng
  • Dan Zhang
  • Dian-Jun Zhao
  • Fan Lin
  • Fuwei Zhang
  • Guo Aiqiang
  • Hai-Yang Du
  • Haijun Yang
  • Hang Liu
  • Hanyang Xing
  • Haofei Gao
  • Heng-Tong Ding
  • Hongxin Dong
  • Ji-Chong Yang
  • Ji-Hao Wang
  • Jia Ni
  • jiajun xie
  • Jialu Zhang
  • Jian Liang
  • Jianhui Zhang
  • Jin-Xin Tan
  • Jun Hua
  • Juzheng Liang
  • Kai Zhang
  • Kai-Fan Ye
  • Kaitai Cao
  • kang yu
  • Ke-Long Zhang
  • Kehfei Liu
  • Keping (可平) Xie (谢)
  • kexin lv
  • Kuan Zhang
  • Lei-Yi Li
  • li sha
  • Li-Jun Zhou
  • Lingquan Ma
  • Liuming Liu
  • Liuyuan Fan
  • Long Chen
  • Long-Bin Chen
  • meiqi gao
  • Mu-Hua Zhang
  • Qingyang Liu
  • Ruilin Zhu
  • Sheng-Tai Li
  • Shihao Su
  • Shiyi Zhong
  • Shunyan Yu
  • Shuo Han
  • Tian Lin
  • tongwei lin
  • Wanbao Li
  • Wei SUN
  • Wen-Jie Song
  • wenzheng hou
  • Xiaonu Xiong
  • xinran liu
  • xinyang wang
  • Xinyang Xu
  • Xiu-Lei Ren
  • Xu Feng
  • Xue-Ying Han
  • Xueze Zhang
  • Yahui Chai
  • Yangheng Zheng
  • Yi-Bo Yang
  • Yifan Wu
  • Yigang Ji
  • Yijia Zeng
  • Ying Chen
  • Yiyang Liu
  • Yong (勇) Du (杜)
  • Yu Meng
  • Yuwen Peng
  • Zhaolong Zhang
  • Zhen Cheng
  • Zhen Wang
  • Zhengyang Li
  • Zhenkang Lu
  • Zhexiang Linghu
  • ZHICHAO GONG
  • Zhipeng Zhao
  • 书磊 张
  • 伟 陈
  • 刚 李
  • 启源 罗
  • 吴 佳俊
  • 啸 常
  • 啸岚 蒙
  • 啸洋 王
  • 圣奇 张
  • 子毓 王
  • 孟初 蔡
  • 宫 明
  • 家志 陈
  • 崧 王
  • 川 刘
  • 志成 胡
  • 志福 邓
  • 恩 王
  • 惠琳 张
  • 文 世达
  • 斯阳 陈
  • 晓民 沈
  • 晨 陈
  • 朝峰 刘
  • 楠 王
  • 浩波 燕
  • 海涛 舒
  • 涛 罗
  • 淙灵 范
  • 清福 宋
  • 渝飞 凌
  • 源源 黄
  • 玮平 黄
  • 立强 李
  • 翔鹏 王
  • 莎 李
  • 衢智 李
  • 辰飞 陆
  • 金龙 党
  • 鉴 郭
  • 鑫 张
  • 黄 俊元
  • 龙成 桂
    • 08:00 → 22:00
      注册 14h 大堂 (中海凯骊酒店)

      大堂

      中海凯骊酒店

      深圳市龙岗区体育新城大运路168号
    • 08:15 → 08:25
      开幕致辞 10m CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Speaker: Prof. 建伟 黄
    • 08:25 → 09:55
      Section 1: 大会报告-1 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 川 刘
      • 08:25
        格点QCD进展综述 30m
        Speaker: Prof. 莹 陈
      • 08:55
        Neutrino-nucleon scattering with lattice QCD 30m
        Speaker: Prof. Keh-Fei Liu
      • 09:25
        Strong interaction origin of hadron masses 30m

        I will present the progress and outlook on the strong interaction origin of hadron masses based on the CLQCD ensembles.

        Speaker: Prof. 一玻 杨 (ITP/CAS)
    • 09:55 → 10:30
      Group photo & Tea break 35m
    • 10:30 → 12:00
      Section 2: 大会报告-2 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 莹 陈
      • 10:30
        Lattice QCD Studies of Glueballs 30m

        Glueballs provide a direct setting for studying how nonperturbative gauge dynamics generates massive hadronic excitations. While lattice calculations in pure Yang–Mills theory have established a well-defined glueball spectrum, identifying the corresponding states in full QCD is considerably more challenging. In the scalar channel, gluonic, quark–antiquark, and multihadron operators couple to the same finite-volume eigenstates, so mixing and strong-decay effects must be treated explicitly.

        In this talk, I will briefly review lattice-QCD studies of the glueball spectrum and radiative processes relevant to experimental searches. I will then present our recent study of scalar glueball–(s\bar{s}) mixing in (N_f=1) lattice QCD with a dynamical strange quark, where we find sizable mixing between the gluonic and (s\bar{s}) sectors. Finally, I will discuss our ongoing extension toward a larger variational basis including flavor-singlet two-meson operators, with the longer-term goal of studying scalar scattering and resonance properties.

        Speaker: Prof. 龙成 桂
      • 11:00
        Gradient flow in perturbative QCD and lattice QCD 30m
        Speaker: Prof. 翔鹏 王
      • 11:30
        Quantum computing for lattice QCD 30m
        Speaker: Prof. 雅卉 柴
    • 12:00 → 14:00
      Lunch break 2h
    • 14:00 → 16:00
      Section 3: 大会报告-3 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 旭 冯
      • 14:00
        Highlights from the ATLAS Experiment 30m

        This report highlights the latest ATLAS physics results based on proton-proton collision data collected during LHC Run 2 and Run 3. High precision measurements of Higgs boson properties validate Standard Model predictions for production cross sections and couplings. Evidence is obtained for rare Higgs decays such as H->mumu and H->Zgamma, while constraints are set on Higgs CP-violating interactions and self-couplings from di-Higgs and tri-Higgs searches. Differential top quark spectra and the toponium quasi bound state measurement offer stringent tests of pQCD. Studies of vector boson scattering yield evidence for longitudinally polarized W bosons, and several triboson processes are observed. Searches for physics beyond the Standard Model cover exotic Higgs signatures, dark matter, LLP and effective field theory interpretations, with no statistically significant excess identified. Complementary results from heavy ion and light ion collision data are also briefly reported.

        Speaker: Prof. 海军 杨 (Shanghai Jiao Tong University (CN) and TDLI)
      • 14:30
        CMS实验最新进展及格点QCD相关研究 30m
        Speaker: Prof. 朔 韩
      • 15:00
        超子半轻子衰变实验研究 30m
        Speaker: Prof. 涛 罗
      • 15:30
        Future High-Energy Nuclear Physics Experiments at HIAF: Hyperon-Nucleon Spectrometer 30m
        Speaker: Prof. 爱强 郭
    • 16:00 → 16:30
      Tea break 30m
    • 16:30 → 18:00
      Section 4: 大会报告-4 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 亨通 丁
      • 16:30
        走进超算互联网,国产算力加速科学计算 30m
        Speaker: Mr 博运 肖
      • 17:00
        Rotating QCD matter in strong coupling limit in lattice QCD approach 30m

        Analytic strong-coupling calculations and previous rotating-lattice simulations appear to predict opposite responses of deconfinement to rotation. We investigate this tension in pure $SU(3)$ gauge theory on anisotropic lattices at imaginary angular velocity over $1.5\leq\beta\leq4.5$. At strong coupling we find a reentrant deconfined--confined--deconfined sequence near the zero-rotation transition, in qualitative agreement with analytic strong-coupling theory. The corresponding nonmonotonic phase boundary locally continues to a decreasing transition temperature at real rotation. As $\beta$ increases, the reentrant interval closes between $\beta=2.75$ and $3.0$; at larger $\beta$ and moderate temperatures above $T_c^0$, the Polyakov loop instead initially increases with imaginary angular velocity, recovering the response observed in earlier lattice studies. We further show that quadratic and quartic fits to the same imaginary-rotation boundary yield opposite trends after analytic continuation. The results reconcile the strong-coupling and previous lattice observations as distinct coupling--temperature regimes and expose the cutoff and ansatz dependence that must be controlled when extrapolating to real rotation.

        Speaker: Dr 冀翀 杨 (Liaoning normal university)
      • 17:30
        An Infrared Topological Approach to Baryon Structure 30m

        This report investigates the infrared structure of QCD through the lens of the Cho–Faddeev–Niemi decomposition and Faddeev–Niemi effective theory. We argue that gluon knots, as topological solitons characterized by the Hopf invariant, constitute the relevant infrared ground-state degrees of freedom of Yang–Mills fields. Within this framework, we present a unified mechanism for monopole condensation and center-vortex confinement. Crucially, we introduce a picture of baryons as quarks embedded in a gluon-knot background, where dual superconductivity naturally gives rise to the characteristic $\mathrm{Y}$-shaped flux-tube geometry. We further delineate how the strong local color-magnetic fields drive chiral symmetry breaking through magnetic catalysis. The talk will also highlight the topological connection between the Hopf invariant, Yang–Mills vacua, and the axial anomaly, demonstrating that the topological current of gluon knots offers a viable carrier for the missing proton spin. Ultimately, we offer a cohesive, topology-driven perspective uniting confinement, chiral symmetry breaking, and baryon structure.

        Speaker: Dr 凡 林 (Anhui University of Science and Technology)
    • 18:00 → 19:30
      自助晚餐 1h 30m 大堂吧 (中海凯骊酒店)

      大堂吧

      中海凯骊酒店

      深圳市龙岗区体育新城大运路168号
    • 19:30 → 21:00
      重大项目内部讨论会 1h 30m 马德里厅 (中海凯骊酒店)

      马德里厅

      中海凯骊酒店

      深圳市龙岗区体育新城大运路168号
    • 08:30 → 10:00
      Section 5: 大会报告-5 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 一玻 杨
      • 08:30
        LaMET最新进展 30m
        Speaker: Prof. 向东 季
      • 09:00
        Progress and Challenges in Phenomenological Determination of PDFs 30m

        We present new parton distribution functions (PDFs) at next-to-next-to-leading order (NNLO) from the CTEQ-TEA global analysis of quantum chromodynamics. The CT25 PDFs incorporate new data from the LHC and employ a more flexible parametrization, enabling improved fits to the various quark flavor combinations. The CT25 PDFs include a central set and Hessian error sets. Instead of the combined global + dynamic tolerance used in CT18, the main CT25 PDF set uses only a dynamic tolerance. We also present CT25 PDFs at leading order (LO) and next-to-leading order (NLO), along with (N)NLO sets for different $\alpha_s$ values, and PDF4LHC-like sets. Phenomenological implications are discussed, with emphasis on Higgs production at the 13 TeV LHC.

        Speaker: Prof. 可平 谢 (TDLI/SJTU)
      • 09:30
        Matching Singlet Axial-Vector and Topological Currents from (S)MOM to MS to Four Loops 30m

        The singlet axial-vector and topological current operators play central roles in determining the quark and gluon spin contributions to the proton spin. As a consequence of the Adler–Bell–Jackiw anomaly, the axial-vector current $J_A^\mu$ acquires a non-trivial renormalization starting at two loops in perturbation theory, which is closely related to the renormalization of the topological current. The determination of the renormalization constant for $J_A^\mu$ at high orders is complicated by the notorious difficulty of treating $\gamma_5$ in dimensional regularization. Employing an newly proposed efficient variant of Larin's renormalization condition for $J_A^\mu$ in dimensionally regularized QCD, we compute the finite matching coefficients from (S)MOM to $\overline{\mathrm{MS}}$ schemes up to unprecedented (3)4 loops. These results provide essential theoretical input for accurately converting (S)MOM-renormalized currents computed in lattice QCD to their $\overline{\mathrm{MS}}$-renormalized counterparts.

        Speaker: Dr 龙 陈 (Shandong University)
    • 10:00 → 10:30
      Tea break 30m
    • 10:30 → 12:00
      Section 6: 大会报告-6 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 伟 王
      • 10:30
        Understand Hadron structure from Wick Contraction 30m

        我们提出一种新方案,通过研究不同维克收缩的图形,可以用以分辨强子的内部结构信息。我们对ρ介子中ππ到ππ的两类维克收缩图进行计算,可以清楚看到当四条夸克线都是从soure到sink的情况下,并不会出现ρ介子的能级贡献,这表明ρ中的两夸克成分是主要的。

        Speaker: Prof. 佳俊 吴 (UCAS)
      • 11:00
        From Longitudinal to Transverse Structure: Hadron Tomography from Lattice QCD 30m

        Understanding the partonic structure of hadrons from first principles is a major goal of lattice QCD. In this talk, I will review recent progress by the Lattice Parton Collaboration using large-momentum effective theory (LaMET). I will first discuss lattice determinations of longitudinal parton structure, including parton distribution functions and light-cone distribution amplitudes of mesons and baryons, together with recent developments in renormalization, perturbative matching, and large-momentum extrapolation. I will then turn to transverse-momentum-dependent distributions, where lattice calculations have progressed from the soft function and Collins–Soper kernel to TMD wave functions, unpolarized TMDPDFs, and spin-dependent distributions. These developments illustrate the emerging capability of lattice QCD to quantitatively resolve the multidimensional partonic structure of hadrons.

        Speaker: Prof. 俊 华 (South China Normal University)
      • 11:30
        Static Quark-Antiquark Interactions in Rotating SU(3) Gluodynamics 30m
        Speaker: Prof. 海涛 舒
    • 12:00 → 14:00
      Lunch break 2h
    • 14:00 → 15:55
      Section 7: 分会场-1, Session 1 CXII102 (会议楼2)

      CXII102

      会议楼2

      香港中文大学(深圳)
      Convener: Dr 宽 张
      • 14:00
        Baryon-Baryon Scattering in $N_f = 2+1$ Lattice QCD 20m

        We present a preliminary lattice QCD study of baryon-baryon scattering using $N_f = 2+1$ CLQCD configurations. We focus primarily on the strangeness $S = -2$ $\Lambda\Lambda$ and $\Xi N$ systems to explore the properties of $H$-dibaryon near threshold using the Lüscher finite-volume quantization condition. Furthermore, we extend our study to baryon-baryon systems involving the $\Omega$ baryon. We report recent progress on the interaction in these sectors and discuss the implications of different numerical extraction techniques.

        Speaker: Dr 瀚洋 邢 (South China Normal University)
      • 14:20
        Non Perturbative Hamiltonian Framework for Finite Volume Energies of N-body System 20m
        Speaker: Dr 康 余
      • 14:40
        DbarN meson-baryon scatter in Lattice QCD 15m

        This project studies the low-energy $\bar{D}N$ scattering in lattice QCD, focusing on the S-wave channels $I(J^P)=0\left(\frac12^-\right), 1\left(\frac12^-\right)$.

        Finite-volume $\bar{D}N$ correlation functions are analyzed using the generalized eigenvalue problem (GEVP) to extract the two-body energy spectrum. The Lüscher formalism is then used to relate the finite-volume energy levels to infinite-volume scattering amplitudes. Near threshold, the effective range expansion (ERE) is employed to extract low-energy scattering parameters, including the scattering length and effective range. Possible effects from higher channel $\bar{D}^*N$ , is also considered.

        The overall aim is to obtain a first-principles understanding of the low-energy $\bar{D}N$ interaction and to clarify whether it supports any near-threshold structures.

        Speaker: Mr 啸 常 (中国科学院近代物理研究所)
      • 14:55
        $S$-wave scattering length of the $J/\psi J/\psi$ system from lattice QCD in coordinate space 15m

        The $J/\psi J/\psi$ energy spectra are extracted from lattice QCD by utilzing the Coordinate-Space Two-Hadron Operators, named as dumbbell method.

        Finite-volume energies indicate an attractive interaction in total spin $S=0$ channel and a repulsive interaction in total spin $S=1$ channel and total spin $S=2$ channel.

        The scattering lengths of three different total spin are also extracted from the lattice energy levels.

        Speaker: Mr 嘉竣 谢 (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)
      • 15:10
        calculate Λ → pℓ¯νℓ semileptonic decay in lattice QCD 15m

        This work presents a non-perturbative lattice-QCD study of the semileptonic decay (\Lambda \to p\ell\bar{\nu}_{\ell}), where (\ell=e,\mu). The main objective is to calculate the hadronic transition matrix element

        $$ \langle p|\bar{u}\gamma^\mu(1-\gamma_5)s|\Lambda\rangle $$ and extract the corresponding vector and axial-vector form factors. Two-point and three-point correlation functions are constructed on the lattice. Excited-state contamination is reduced using the summation method, correlated global fits, and jackknife resampling. The momentum-transfer dependence of the form factors is described using a model-independent \(z\)-expansion with the appropriate kinematic constraints. The extracted form factors are then used to calculate the differential and total decay rates, $$ \Gamma_\ell = \int_{m_\ell^2}^{(m_\Lambda-m_N)^2} dq^2\, \frac{d\Gamma_\ell}{dq^2}, $$ and to determine the CKM matrix element \(\lvert V_{us}\rvert\). Using experimental baryon masses, the resulting muon-to-electron decay-rate ratio is $$ R_{\mu/e}=0.16464(18), $$ while the extracted values of \(\lvert V_{us}\rvert\) are $$ V_{us,e}=0.2438(21), V_{us,\mu}=0.2557(161). $$

        The study demonstrates the feasibility of determining (\Lambda)-baryon semileptonic form factors from lattice QCD. Further calculations with multiple lattice spacings, improved mass tuning, and continuum extrapolation are required for a precision determination of (\lvert V_{us}\rvert).
        \langle p|\bar{u}\gamma^\mu(1-\gamma_5)s|\Lambda\rangle
        ]

        Speaker: Mr 鉴 郭 (中国科学院近代物理研究所)
      • 15:25
        η and η' mesons from lattice QCD 15m

        Understanding the masses of $\eta$ and $\eta$' mesons as well as the mixing between the original flavor singlet state and the neutral octet state is an important topic in low-energy strong-interaction physics. We determine masses and mixing angle of the $\eta$ and $\eta$' mesons in lattice QCD. The calculations are carried out on a set of 13 CLQCD gauge ensembles with $N_f$ = 2 + 1 Wilson-Clover quarks. These ensembles cover three values of the lattice spacing a = 0.105, 0.077, 0.052fm and pion masses from 136 to 317MeV, including two ensembles at physical pion mass. In all ensembles, we used all-to-all quark propagators, named perambulators, generated via a distillation smearing algorithm to improve signal quality. The fitting results indicate that the perambulators perform well for both connected and disconnected diagrams of the correlation function, without requiring too many configurations. This provides a solid foundation for accurately calculating the masses of the $\eta$ and $\eta$' mesons, especially the $\eta$'.

        Speaker: Mr 立强 李 (河北大学)
      • 15:40
        Portraits of Charmoniumlike States 15m

        The charm quark density-density correlation is calculated for 1S and 1P conventional charmonia and $J^{PC}=1^{−+},0^{+−}$ charmoniumlike states from lattice QCD and are interpreted as spatial wave functions of these states with some approximations. The angular distributions of $c\bar{c}$ in conventional charmonia are found to be in accordance with the expectation of two-body systems, while that of the $1^{−+}$ state exhibits an S-wave feature. However, the $c\bar{c}$ radial distributions turn out to be strikingly different from the non-relativistic quark model and can be understood by the Dirac theory of two-body bound states. These results provide the first gauge invariant and model-independent three-dimensional portraits of charmonium(like) states.

        Speaker: Mr 清扬 刘 (ihep)
    • 14:00 → 15:55
      Section 8: 分会场-2, Session 1 CXII103 (会议楼2)

      CXII103

      会议楼2

      香港中文大学(深圳)
      Convener: Dr 殿君 赵
      • 14:00
        Parton Distribution Functions from Large Momentum Expansion of Current-Current Correlators 20m

        The universality of the large momentum expansion allows computing parton distribution functions (PDFs) starting from any Euclidean correlator with appropriate large momentum Fourier
        Components. Here we consider current-current correlators which have been used in short-distance
        expansion to obtain moments of PDFs. The advantage of such correlators is that they have simple
        renormalization properties and do not have linear power divergences as in quasi-PDF. However, in
        lattice calculations, four-point functions are needed. Here we present an expansion formula with
        current-current correlators up to the next-to-leading order, and preliminary numerical calculations
        with four-point functions.

        Speaker: Dr 家璐 张 (Shanghai Jiao Tong University)
      • 14:20
        Unpolarized Gluon PDF from Lattice QCD 20m
        Speaker: Dr 春华 曾
      • 14:40
        Neural-network extraction of collinear transversity distributions and tensor charges with distribution level lattice-QCD input 15m

        We present a neural-network global analysis of transversity parton distributions and dihadron fragmentation functions using Belle, HERMES, COMPASS, and STAR measurements. The main new ingredient is an x-dependent lattice-QCD determination of isovector transversity, included directly at positive and negative x. It complements the limited experimental coverage and favors a larger positive up-quark and a more negative down-quark transversity while retaining an acceptable description of the world data.

        Speaker: Mr 宏鑫 董 (Nanjing Normal University)
      • 14:55
        From Spin Structure to Transverse Momentum Distributions: A Lattice View of the Nucleon 15m

        Understanding how the spin, flavor, and intrinsic transverse motion of quarks emerge from QCD is essential for building a complete picture of nucleon structure. Recent developments in large-momentum effective theory have made it possible to access increasingly detailed partonic information directly from lattice QCD.

        In this talk, I will present two complementary lattice studies of nucleon structure. The first focuses on the spin-flavor structure encoded in ratios of helicity and unpolarized parton distribution functions, with particular emphasis on $\Delta d(x)/d(x)$. This ratio directly probes the polarization of the down quark inside a longitudinally polarized nucleon, especially in the valence region, while benefiting from partial cancellation of common systematic uncertainties between the helicity and unpolarized distributions.

        The second study extends this picture from longitudinal spin structure to the transverse-momentum structure of the nucleon through calculations of isovector unpolarized and helicity TMD PDFs, $f_1^{u-d}(x,b_T)$ and $g_{1L}^{u-d}(x,b_T)$. Using ensembles with multiple lattice spacings, pion masses, and nucleon momenta, together with nonperturbative Collins–Soper evolution and LaMET matching, we investigate their dependence on both the longitudinal momentum fraction $x$ and the transverse separation $b_T$, as well as the associated systematic uncertainties.

        Together, these studies illustrate how lattice QCD can connect the spin structure of the nucleon with its transverse-momentum structure, providing increasingly detailed first-principles information on nucleon partonic dynamics and complementary input for phenomenology and future Electron-Ion Collider measurements.

        Speaker: Mr 金鑫 谭 (Shanghai Jiao Tong University)
      • 15:10
        Continuum-Limit Heavy-Meson LCDAs from Lattice QCD 15m
        Speaker: Mr 浩飞 高
      • 15:25
        Complete Leading-twist Baryon Light-cone Distribution Amplitudes from LQCD 15m

        Baryon light-cone distribution amplitudes (LCDAs) encode the longitudinal momentum distributions of valence quarks and provide important nonperturbative inputs for hard exclusive processes involving baryons. In this talk, I will present the first lattice determination of the three leading-twist $\Lambda$-baryon LCDAs, $V$, $A$, and $T$, as full two-dimensional functions of the valence-quark momentum fractions.

        This work establishes a systematic large-momentum effective theory (LaMET) framework for determining leading-twist baryon LCDAs from lattice QCD, covering the complete procedure from equal-time three-quark correlators to the momentum-fraction dependence of physical light-cone amplitudes. Key ingredients include a two-dimensional hybrid renormalization prescription in coordinate space, an HQET-motivated large-$\lambda$ extrapolation strategy for controlling the long-distance behavior of Euclidean correlators, one-loop perturbative matching to the light-cone amplitudes in the $\overline{\rm MS}$ scheme, and controlled extrapolations to the continuum, physical-pion-mass, and infinite-momentum limits.

        As a phenomenological illustration, replacing the asymptotic LCDA with the lattice-determined distributions leads to an $\mathcal{O}(10\%)$ shift in the $\Lambda$ electromagnetic form factor at perturbative scales. These results provide the first complete multidimensional, $x$-dependent baryon LCDAs from first principles and establish a framework for future lattice studies of baryon light-cone structure.

        Speaker: Mr 沐华 张 (Shanghai Jiao Tong University)
      • 15:40
        Precision determination of nucleon iso-vector scalar and tensor charges at the physical point 15m

        We report a high precision calculation of the isospin vector charge $g_{S,T}$ of the nucleon using recently proposed "blending" method which provides a high-precision stochastic estimate of the all-to-all fermion propagator. A spin-$1/2$, isospin-$1/2$ projected current-involved basis element is utilized to reduce a particular nucleon-meson type excited state contamination whose coupling to the current operator is enhanced by the lattice spatial volume. Using 16 $N_f=2+1$ lattice ensembles which cover 5 lattice spacing, 5 combinations with the same quark masses and lattice spacing but multiple volumes, including three at the physical pion mass, we report so far most precise lattice QCD prediction with the systematic uncertainties from continuum, infinite volume, chiral extrapolations, excited state contamination and also renormalization.

        Speaker: Mr 积昊 王 (Institute of Theoretical Physics,Chinese Academy of Sciences)
    • 15:55 → 16:25
      Tea Break 30m
    • 16:25 → 18:00
      Section 10: 分会场-2, Session 2 CXII103 (会议楼2)

      CXII103

      会议楼2

      香港中文大学(深圳)
      Convener: Dr 家璐 张
      • 16:25
        Control of Excited-State Contamination in Nucleon Matrix Elements Using All-to-All Fermion Propagators 20m

        We present a method to decompose and control excited-state contamination in nucleon matrix elements using all-to-all fermion propagators. By constructing a variational basis of nucleon and nucleon–meson interpolating operators, we resolve the contributions of the nucleon ground state and low-lying multi-hadron states. In particular, we investigate excited states containing ($N\pi$), ($N\pi\pi$), and meson-related scattering components such as ($Nf_1$). The generalized eigenvalue problem is applied to the two-point correlation matrix to determine optimized operators, which are then used to rotate the three-point functions and reduce transitions involving excited states. This framework allows the excited-state contributions to be studied separately instead of being absorbed into an uncontrolled systematic uncertainty. We focus on the scalar and axial charges, ($g_S$), ($g_A$), for which excited-state effects can have different magnitudes and time dependence. The method provides a systematic approach to improving the reliability of nucleon structure calculations and to quantifying the residual excited-state contamination.

        Speaker: Dr 志成 胡 (ITP)
      • 16:45
        Vector-meson light-cone distribution amplitude moments from lattice QCD with gradient flow 15m
        Speaker: Mr 彤巍 林
      • 17:00
        Gluon Helicity Distribution of the Nucleon from Lattice QCD in Continuum Limit 15m

        We report a state-of-the-art lattice QCD calculation of the gluon helicity parton distribution function of the proton within the large-momentum effective theory framework. The calculation employs 2+1-flavor CLQCD gauge ensembles at three lattice spacings $a=\{0.105, 0.0897, 0.0775\}$ fm and pion mass of approximately $300$ MeV/$c^2$, with nucleon momenta up to $3.0$ GeV/$c$. Distillation with momentum smearing is applied to improve the signal of two-point gluon-field correlation functions. We renormalize the results in the hybrid scheme, applying self-renormalization to purely imaginary and antisymmetric matrix elements.
        After one-loop perturbative matching, the gluon helicity distribution
        is extrapolated to the continuum and infinite-momentum limits. The final result is consistent with global fitting within errors.

        Speaker: Mrs 诗怡 钟 (CUHK(SZ))
      • 17:15
        Collins-Soper Kernel and Intrinsic Soft Funtion 15m

        横动量依赖分布(TMD)相关量,例如横动量依赖部分子分布函数(TMDPDF),能够为研究强子的三维结构提供关键信息,同时也是半包容深度非弹性散射(SIDIS)和 Drell–Yan 过程等高能散射过程中的重要非微扰输入。与共线部分子分布函数(PDF)不同,TMD 中包含近光锥 Wilson 线,因此会由于软动力学与共线动力学之间的分离而产生快度发散。为了消除这些发散,需要对软贡献进行适当的减除,而 TMD 对快度标度的依赖则由 Collins–Soper 核控制。此外,内禀软函数(intrinsic soft function)刻画了与快度无关的长程软胶子贡献,对于完整描述 TMD 因子化中的非微扰效应至关重要。

        在本次报告中,我将首先介绍 Collins–Soper 核和内禀软函数在 TMD 物理中的理论作用。随后,我将讨论如何在大动量有效理论(LaMET)框架下利用格点 QCD 提取这些物理量。最后,我将介绍我们近期在这一研究方向上的拓展,包括改进的格点计算、次领阶(NLO)匹配、对连续极限和物理 pion 质量极限的可控外推,以及在横向间距达到约 1fm 范围内对内禀软函数的确定。

        Speaker: Mr 智超 龚
      • 17:30
        Hyperons Gluon Helicity from Lattice QCD 15m

        We present the first lattice QCD calculation of the total gluon helicity contribution $\Delta G_H$ to the spin of $\Lambda$, $\Sigma$, and $\Xi$ hyperons.
        The calculation employs the Coulomb-gauge fixed topological current $K^\mu$, whose forward matrix element in the infinite momentum frame yields $\Delta G_H$ without non-trivial perturbative matching.
        Using a single $N_f=2+1$ flavor dynamical ensemble with lattice spacing $a\approx 0.105\ \mathrm{fm}$ and pion mass $m_\pi\approx 292\ \mathrm{MeV}$, we extract the bare matrix elements via the Feynman-Hellmann method, with distillation and momentum smearing to control excited-state contamination.
        The bare matrix elements are non-perturbatively renormalized in the RI/MOM scheme and subsequently converted to the $\overline{\mathrm{MS}}$ scheme; the renormalization factor $\bar{Z}_{11}^{\mathrm{lat}}$ is employed, whose state-independence is guaranteed by the intrinsic nature of operator ultraviolet divergences.
        After infinite-momentum extrapolation and renormalization, we obtain
        $\Delta G_{\Lambda} = 0.165(19)_{\rm stat}(19)_{\rm ren}$,
        $\Delta G_{\Xi} = 0.160(14)_{\rm stat}(19)_{\rm ren}$, and
        $\Delta G_{\Sigma} = 0.232(24)_{\rm stat}(28)_{\rm ren}$
        at the $\overline{\mathrm{MS}}$ scale $\mu^2 = 10\ \mathrm{GeV}^2$, corresponding to approximately
        $37(5)_{\rm stat}(4)_{\rm ren}\%$,
        $33(3)_{\rm stat}(4)_{\rm ren}\%$, and
        $48(5)_{\rm stat}(6)_{\rm ren}\%$ of the hyperon total spin, respectively.
        The temporal and spatial components of $K^\mu$ yield consistent results, confirming Lorentz covariance of the approach beyond the nucleon sector.
        These first-principles results reveal the impact of flavor-symmetry breaking on gluon polarization across the baryon octet.

        Speaker: Mr 昕然 刘 (Nanjing Normal University)
      • 17:45
        BESIII上粲介子纯轻和半轻衰变 15m

        BESIII实验于2011至2024年间,采集了世界上最大的近阈粲介子对样本,这些量子关联产生的粲介子对为精确测量粲介子含轻衰变提供了独特平台。基于该数据样本,BESIII精确测定了粲介子纯轻衰变的衰变常数,粲介子半轻衰变到(赝)标量,(轴)矢量,张量介子的强相互作用形状因子,并抽取了CKM矩阵元$|V_{cs}|$以及$|V_{cd}|$。

        Speaker: Mr 溢嘉 曾 (IHEP)
    • 16:25 → 18:15
      Section 9: 分会场-1, Session 2 CXII102 (会议楼2)

      CXII102

      会议楼2

      香港中文大学(深圳)
      Convener: Dr 啸洋 王
      • 16:25
        Leading-order dynamical QED corrections to the thermodynamics of isospin-asymmetric QCD 20m

        At large isospin chemical potential $\mu_I$ and low temperature, QCD undergoes a second-order transition to a Bose-Einstein condensate of charged pions, whose order is encoded in the non-analytic $\mu_I$-dependence of the pressure and of the isospin density derived from it. Including dynamical photons is expected, on general grounds, to drive this transition first order. Since unequal quark charges render the QCD+QED action complex, we avoid the sign problem by expanding the pressure to $\mathcal{O}(e^2)$ around $e=0$, with the leading contribution governed by the second charge-derivative of the free energy density, $\partial^2 f/\partial e^2|_{e=0}$. We evaluate it directly on existing isospin-asymmetric pure-QCD ensembles as a spacetime convolution of the Feynman-gauge photon propagator with the vector current-current correlator at nonzero $\mu_I$ and pion source $\lambda$. The full correlator is computed using a point source and a newly proposed two-dimensional planar source. We report progress toward the first lattice determination of $\partial^2 f/\partial e^2|_{e=0}$ as a function of $\mu_I$, which captures, at leading order, the imprint of dynamical photons on the thermodynamics across the transition.

        Speaker: Dr 玮平 黄 (Eötvös Loránd University)
      • 16:45
        Isospin-Driven Splitting of Chemical Potentials in Isobar Collisions from Lattice QCD 15m

        Strong magnetic fields produced in relativistic heavy-ion collisions can modify conserved-charge fluctuations and their associated chemical potentials. The Ru and Zr isobars share the same mass number, $A=96$, but have different charge-to-baryon ratios, making Ru+Ru and Zr+Zr collisions a controlled setting for isolating isospin effects. In this talk, we will present first-principles, continuum-estimated $(2+1)$-flavor lattice-QCD results for isospin-driven splittings of conserved-charge chemical potentials near the QCD crossover, at both vanishing and nonzero external magnetic fields along the pseudocritical line $T_{\mathrm{pc}}(eB)$. Under strangeness neutrality and the charge-to-baryon constraint $r\equiv n_Q/n_B$, the difference in nuclear isospin composition is mapped onto the splitting ratios $\Delta\mu_Q/\Delta\mu_B$, $\Delta\mu_S/\Delta\mu_B$, and $\Delta\mu_S/\Delta\mu_Q$. At vanishing magnetic field, the lattice results yield $\Delta\mu_Q<0$ and $\Delta\mu_S>0$, with the electric-charge sector dominating, and the splitting ratios are similar in magnitude to recent Bayesian extractions from STAR isobar data. At nonzero magnetic fields, the splitting ratios themselves vary only moderately with $eB$. A clearer field signal emerges from the Ru-Zr difference in the normalized magnetic-field response: in lattice QCD, the relative response of $\mu_Q/\mu_B$ is substantially stronger in Ru+Ru than in Zr+Zr. We also present hadron resonance gas (HRG) results and experimentally motivated proxy observables with kinematic cuts to facilitate contact with experiment. These results provide first-principles benchmarks for the conserved-charge response to isospin and magnetic fields in isobar collisions.
        This talk is based on our recent work: H.-T. Ding, J.-B. Gu, A. Kumar, and J. Ni, arXiv:2606.30164 [hep-lat] (2026).

        Speaker: Mrs 佳 倪 (Central China Normal University)
      • 17:00
        QCD Chiral Crossover Line from Lee--Yang Edge Singularities 15m

        We propose a universality-based reconstruction of the QCD chiral crossover line from Lee--Yang edge singularities in the complex baryon chemical potential plane[1]. The framework maps lattice-extracted complex Lee--Yang-zero estimates, treated as proxies for edge singularities, to the universal chiral Lee--Yang edge and thereby determines the $\mu_B$ dependence of both the chiral critical line in the light-quark chiral limit and the pseudo-critical crossover line at physical quark masses. As an illustration, we apply the framework to Lee--Yang-zero estimates recently obtained by the Wuppertal--Budapest collaboration from high-statistics lattice QCD simulations. Without imposing the previously determined small-$\mu_B$ expansion of the crossover line as input, the reconstructed curvature is consistent with existing continuum lattice-QCD results at small $\mu_B$. The fitted chiral-limit transition temperature is also compatible with existing chiral-scaling analyses. These results demonstrate that lattice information on Lee--Yang singularities, combined with universal chiral scaling, provides a quantitatively consistent constraint on the QCD crossover line within the present temperature window and establishes a framework that can be systematically improved with future Lee--Yang-zero determinations.

        [1] H.-T. Ding, S. Mukherjee, P. Petreczky, and K.-F. Ye, QCD Chiral Crossover Line from Lee-Yang Edge Singularities, arXiv:2608.05752 [hep-lat] (2026).

        Speaker: Mr 凯帆 叶 (Central China Normal University, Institute of Particle Physics)
      • 17:15
        Chiral gauge theories on a disk and a slab 15m

        The Standard model as a chiral gauge theory is the core foundation of particle physics. Yet, no consensus has been reached on non-perturbative formulations of chiral gauge theories although a few number of promising theoretical models have been constructed. In this work, we exam the extra dimension or domain wall fermion approach. Firstly, we numerically tested the slab (Grabowska-Kaplan) proposal in 2+1 dimensional lattice with a background gauge field and showed anomaly inflow, anomaly cancellation, and the behaviour of the boundary chiral model under different flow of the gauge field. Secondly, we tested a recently proposed proposal with a disk shape defect with a boundary under annealing flow of the background gauge field. Similarly, we demonstrate the mechanism of anomaly inflow and anomaly cancellation.

        Speaker: Mr 金龙 党 (北京大学)
      • 17:30
        Chiral and $U(1)_A$ symmetries in background magnetic fields from lattice QCD 15m

        Understanding how external magnetic fields affect chiral and singlet $U(1)_A$ symmetry breaking is an important question in QCD under extreme conditions. In a pure magnetic background, the unequal electric charges of the light quarks explicitly reduce the non-singlet flavor symmetry, making it necessary to identify the appropriate neutral mesonic partner channels. We clarify the neutral-sector symmetry structure and identify $\chi_{\pi^0}-\chi_\sigma$ as the chiral-partner splitting associated with the surviving neutral non-singlet axial symmetry, and $\chi_{\pi^0}-\chi_{\delta^0}$ as the singlet $U(1)_A$ partner splitting.
        Using fixed-scale $(2+1)$-flavor HISQ ensembles with $m_\pi\simeq220\,\mathrm{MeV}$ at vanishing magnetic field, we study these observables over a broad range of temperatures and magnetic fields. At low temperatures, both splittings increase with $eB$. At intermediate temperatures, both splittings decrease with increasing $eB$ once the field is sufficiently strong. The decrease of the singlet $U(1)_A$ partner splitting sets in at larger $eB$ and is milder than in the chiral channel. These results provide fixed-scale lattice-QCD evidence for distinct magnetic responses of the neutral chiral and singlet $U(1)_A$ partner susceptibility splittings.

        Speaker: Mrs 丹 张 (Central China Normal University)
      • 17:45
        Chiral anomaly, neutral pion lifetime and axion-photon coupling 15m

        The chiral anomaly underlies many processes, including the two-photon decay of the neutral pion and the axion-photon coupling, and fixes their leading-order contributions to a constant independent of QCD dynamics. However, traditional lattice QCD methods compute the complete amplitude, making percent-level precision demanding. We show that, by applying the anomalous Ward identity (AWI), the anomalous contribution can be isolated directly, leaving only a finite-quark-mass correction that lattice QCD evaluates reliably.Employing this strategy, we present the first lattice determination of the neutral pion lifetime with isospin-breaking effects, and determine the axion-photon coupling to $1.8\%$ precision, furnishing a first-principles benchmark and reconciling the discrepancies among published ChPT determinations.

        Speaker: Mr 天 林 (Peking University)
      • 18:00
        Entanglement Entropy of the Infinitely-Heavy Quark-Antiquark System from Lattice QCD 15m

        An infinite-heavy quark system can clearly be divided into two subsystems: one consisting of two infinitely heavy quarks and the other being the sea gluon and sea quark subsystem, allowing us to define the reduced density matrix and entanglement entropy. We calculate the reduced density matrix defined in color space under the Coulomb gauge condition on lattice dynamical configurations and find the relationship between the proportion of different color components and the distance between quarks.

        Speaker: Mr 刘源 范 (South China Normal University)
    • 18:15 → 21:00
      晚宴 2h 45m 多功能 II 宴会厅 (中海凯骊酒店)

      多功能 II 宴会厅

      中海凯骊酒店

      深圳市龙岗区体育新城大运路168号
    • 08:30 → 10:00
      Section 11: 大会报告-7 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 鹏 孙
      • 08:30
        面向现代多核超算体系结构的格点 QCD 软件设计——QLOTUS 的 SVE 向量化与多后端演进 30m

        格点量子色动力学是研究强相互作用非微扰性质的重要数值方法,也是超级计算机上的典型大规模科学计算应用。HISQ 等改进型费米子作用的 RHMC 组态生成过程需要反复执行Dirac 算子、Inverter和FermionForce计算等模块,对处理器的计算能力、内存带宽、节点内并行和节点间通信均提出了较高要求。与此同时,现代 CPU 平台在向量宽度、指令集、内存层次和编程接口方面日益多样化,使格点 QCD 软件既要实现面向特定平台的深度优化,也要保持跨架构可维护性。

        本报告介绍格点 QCD 软件 QLOTUS 的开发背景、总体架构和阶段性进展。QLOTUS 面向多核 CPU 实现了 HISQ Smearing、Dslash、Inverter、Fermion Force 及完整 RHMC 演化流程,并采用 MPI、NUMA、OpenMP 与 SIMD 相结合的多层并行体系。报告将重点介绍项目在 ARM SVE 平台上的显式向量化方法,包括批处理数据布局、邻域访问、复数与 SU(3) 小矩阵运算,以及计算、通信和内存布局之间的协同设计。在此基础上,进一步介绍 VWrap 显式 SIMD 抽象及其与 QLOTUS 的集成,讨论如何将早期面向固定 SVE 向量宽度的实现扩展到 SVE、AVX-512、AVX2、SSE、NEON及可移植后端,使物理算法与具体指令集和向量宽度相分离。最后,报告将结合跨平台正确性验证和阶段性性能测试,讨论格点 QCD 软件 QLOTUS 后续功能开发、性能优化以及后续发展方向。

        Speaker: Dr 克龙 张 (Central China Normal University)
      • 09:00
        国产超算上的格点QCD与SU(N) Yang-Mills理论模拟软件研究进展 30m

        本报告将介绍国产超算上格点QCD与SU(N) Yang-Mills理论模拟软件的最新进展。首先,介绍以DDQ调度器为核心的自主软件栈,涵盖从编程语言、编译器到上层格点软件的全自主实现,探讨其在国产异构超算平台上的可移植性、并行效率与生态构建。其次,介绍基于Kokkos的性能可移植SU(N)格点Yang-Mills模拟软件,其支持任意时空维度,适用于不同维度和规范群的大规模数值模拟。报告将包括上述软件在国产曙光DCU以及当前Top 500排名世界第一的“灵晟”超算上的运行结果与性能表现,展示国产超算平台上格点场论模拟的可行性与扩展能力。

        Speaker: Dr 玮 孙 (Institute of High Energy Physics, CAS)
      • 09:30
        Algorithms and Softwares for Lattice Gauge Theory 30m

        I will review recent developments in algorithms and softwares for lattice gauge thoery, including AI/ML algorithms and agentic workflows.

        Speaker: Dr 翔宇 蒋 (Indiana University)
    • 10:00 → 10:30
      Tea break 30m
    • 10:30 → 12:30
      Section 12: 大会报告-8 CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Convener: Prof. 柳明 刘
      • 10:30
        Progress on LQCDMaster 30m

        过去数月间,人工智能与智能体深刻重塑了理论物理及相关理论学科的科研范式。本报告首先梳理人工智能在理论物理日常研究中的典型应用场景,涵盖基于对话交互开展的启发式物理探索。在此基础上,针对格点规范场论研究中的核心难点与现存瓶颈,介绍我们研发的全流程人工智能科研框架(IdeaMinerLQCD+LQCDMaster),展示其在文献调研、科研思路挖掘、数学推导计算与结果核验等环节的赋能效果,实现关键科研流程的自动化与效能提升。报告将以重夸克弱衰变中的难题为例,具体探讨人工智能可能带来的机遇。最后,结合量子场论与人工智能的交叉融合趋势,总结研究启示并对未来发展方向进行一些展望。

        Speaker: Prof. 伟 王 (Shanghai Jiao Tong University)
      • 11:00
        Generative AI meets Physics 30m
        Speaker: Prof. 凯 周
      • 11:30
        物理信息神经网络驱动的部分子碎裂函数提取 30m
        Speaker: Prof. 龙刚 庞
      • 12:00
        Lattice QCD: From Precision Tests to New‑Physics Searches 30m

        Lattice QCD has made key breakthroughs in precision calculations for charmonium radiative decays and charm‑meson semileptonic decays in recent years. This talk will first review these developments. Apart from precision tests, searching for possible dark‑matter candidates with high‑precision experimental data constitutes another frontier of modern physics. We will introduce recent lattice advances in axion‑like‑particle studies and neutrino‑background calculations, and outlook its growing significance for dark‑matter studies in the future.

        Speaker: Prof. 雨 孟 (Zhengzhou University)
    • 12:30 → 14:30
      Lunch break 2h
    • 14:30 → 16:55
      Section 13: 分会场-1, Session 3 CXII102 (会议楼2)

      CXII102

      会议楼2

      香港中文大学(深圳)
      Convener: Dr 志成 胡
      • 14:30
        Continuous Renormalization Group Beta Function in Four-Flavor QCD 20m

        The renormalization group beta function encodes how the strength of the strong interaction changes with energy scale, connecting asymptotic freedom at high energies to the onset of nonperturbative dynamics at low energies. We study the beta function of four-flavor QCD using the continuous gradient-flow approach, which provides a nonperturbative definition of the running coupling and its scale evolution. Our calculation follows the running from the perturbative regime toward stronger coupling, with controlled continuum and infinite-volume extrapolations. This provides a first-principles view of the transition between perturbative and nonperturbative QCD dynamics in a theory with four dynamical sea-quark flavors.

        Speaker: Dr 雪莹 韩 (SJTU, Uni. Siegen)
      • 14:50
        Determination of Standard Model Parameters From CLQCD Ensembles 20m

        Lattice QCD provides a first-principles framework for studying the strong interactions and plays an important role in the precision determination of Standard Model parameters. This talk will review the determination of renormalized light and heavy quark masses, and discuss how lattice QCD calculations of hadronic decay matrix elements enable precise extractions of CKM matrix elements. Particular emphasis will be placed on recent results obtained with the CLQCD clover ensembles, illustrating their contributions to precision flavor physics and tests of the Standard Model.

        Speaker: Dr 孟初 蔡 (Institute of Theoretical Physics, Chinese Academy of Sciences)
      • 15:10
        A new approach to the flowed quark field renormalization constant $Z_\chi$ using quark bilinears 15m

        The field renormalization constant of flowed quark fields, denoted as $Z_\chi$, is a critical component in the non-perturbative renormalization of fermion operators within the gradient flow framework. While the conventional ``ringed'' scheme based on the fermion kinetic term provides a theoretically robust definition, its practical implementation on the lattice is hampered by significant statistical noise arising from disconnected contributions. In this work, we propose a novel approach to determine $Z_\chi$ using quark bilinears. To validate our approach, we use the extracted $Z_\chi$ to reconstruct the renormalized bilinear matrix elements $O^R$ for the pseudoscalar, scalar, axial-vector, and tensor channels in the continuum limit.Our results demonstrate excellent consistency between the gradient flow and RI/MOM frameworks, confirming that the bilinear-based $Z_\chi$ provides a reliable and computationally efficient alternative for high-precision lattice QCD calculations.

        Speaker: Mrs 美琪 高 (华南师范大学)
      • 15:25
        Gradient-Flow Renormalization of Nonlocal Quasi Operators in Lattice QCD 15m

        Large-momentum effective theory (LaMET) enables first-principles studies of hadron structure from spatially nonlocal quasi observables, for which renormalization is essential to connect lattice calculations to continuum perturbative schemes. While the renormalization of local operators has been extensively studied using methods such as RI/MOM and gradient flow, nonlocal quasi operators containing space-like Wilson lines involve additional linear divergences and require dedicated renormalization strategies. Conventional self-renormalization can properly remove these divergences, but in practice the extraction of lattice-spacing-dependent renormalization factors is entangled with discretization effects and typically relies on simultaneous analyses at multiple lattice spacings. In this work, we develop a gradient-flow-based renormalization strategy for nonlocal quasi operators. The flow-dependent Wilson-line self energy is extracted from gauge-fixed Wilson lines and then applied as a common long-distance renormalization factor for different quasi matrix elements. After subtracting the linear divergence, the flowed operators are perturbatively matched to the (\overline{\mathrm{MS}}) scheme, thereby separating the Wilson-line self-energy subtraction from the remaining lattice-spacing dependence. Gradient flow also improves the long-distance signal of Wilson-line observables while retaining a controlled field-theoretic interpretation. We implement the procedure on two CLQCD ensembles with different lattice spacings. The extracted self-energy correction shows mild lattice-spacing dependence and yields well-behaved renormalized quasi matrix elements at large separations.

        Speaker: Mr 俊元 黄
      • 15:40
        Quark-Gluon Vertex under Complete Tensor Basis 15m

        The quark gluon vertex is a fundamental quantity in unquenched QCD, where as the "classical" channel, i.e. the spinor structure of $\gamma_\mu$ is related to strong coupling constants $\alpha_s$. Higher order loop correlation would introduce other non-perturbative non-classical structures to the 3-pt correlation function of $\left<\psi\bar\psi A\right>$. In this work, we carried out computation under the complete tensor basis to see whether they are non-negligible or not.

        Speaker: Mr 力军 周 (Dalian University of Technology)
      • 15:55
        Finite-Volume Gluon Trace-Anomaly Matrix Elements in the \(\rho\)-Resonant \(\pi\pi\) Channel 15m

        Understanding how gluonic dynamics manifests itself in unstable hadrons remains an important challenge in studies of hadron mass generation. We investigate the gluon trace anomaly in the isovector (P)-wave (\pi\pi) channel containing the (\rho) resonance using lattice QCD. A variational basis composed of quark-antiquark (\rho) operators and two-pion operators projected onto the appropriate finite-volume irreducible representations is employed. Solving the generalized eigenvalue problem isolates a tower of interacting finite-volume energy eigenstates. For each optimized state, we calculate a vacuum-subtracted gluonic insertion proportional to (\beta(g)F_{\mu\nu}F_{\mu\nu}/(2g)) and extract the corresponding diagonal matrix element using the summed-ratio method. Away from the resonance region, the matrix elements approximately follow the behavior expected for weakly interacting two-pion states. Near the (\rho) resonance, however, we observe a pronounced peak in the gluon trace-anomaly contribution, correlated with the resonant behavior of the finite-volume spectrum and the changing (\rho)- and (\pi\pi)-operator overlaps. The enhancement indicates that the gluonic response of the interacting two-pion system is significantly stronger in the resonance region than the approximate sum of the individual-pion contributions. Our results demonstrate that gluonic trace operators provide a sensitive probe of resonance formation and establish a framework for studying the gluonic structure of unstable hadrons through finite-volume matrix elements.

        Speaker: Mr 啸岚 蒙 (ITP-CAS)
      • 16:10
        基于梯度流的LQCD直接计算:胶子迹反常对重子质量的贡献 15m

        本工作在2+1味clover系综上用LQCD梯度流方法直接计算胶子迹反常对重子质量的贡献,并匹配到MSbar方案。结果显示,胶子迹反常贡献显著且非平庸。且直接计算得到的<g^2 g^2="" tr="">_H与求和规则自洽</g^2>

        Speaker: Mr 晨宇 章 (ITP)
      • 16:25
        Contributions of Electromagnetic Interaction to Hadron Masses 15m

        Electromagnetic effects are increasingly relevant to precision hadron spectroscopy, yet their evolution across the light, strange, charm, and bottom sectors remains poorly mapped. We calculate the leading QED corrections to meson and baryon masses using electroquenched photons on nine 2+1-flavor, tadpole-improved clover ensembles at three lattice spacings, with pion masses from 135 to 316 MeV and spatial extents from approximately 2.5 to 6.7 fm. The quark masses are matched in the Dashen scheme, and the results are extrapolated jointly to the physical pion mass, continuum limit, and infinite volume. Resolving each mass shift into quark self-energy and pairwise interaction terms, we find that attractive electromagnetic interactions lower hadron masses, whereas repulsive interactions raise them. Most neutral hadrons receive corrections below 1 MeV, while singly charged states receive corrections of at most about 5 MeV.

        Speaker: Mr 奕扬 刘 (ITP, CAS)
      • 16:40
        Bottom baryon mass and sigma term contribution 15m

        Using anisotropic clover action for valence bottom quark on CLQCD 2+1 flavor ensembles,we present the accurately prediction of ground state spin-1/2 and spin-3/2 baryon masses containing bottom quark,and extract sigma term contribution to bottom hadron masses using Feynman-Hellman method.

        Speaker: Mr 海洋 杜 (ITP, CAS)
    • 14:30 → 16:55
      Section 14: 分会场-2, Session 3 CXII103 (会议楼2)

      CXII103

      会议楼2

      香港中文大学(深圳)
      Convener: Dr 晨 陈
      • 14:30
        LaMET-Agent: Agentic Workflow for Large-Momentum Effective Theory Analysis 20m

        Extracting light-cone parton distributions from lattice QCD within Large-Momentum Effective Theory (LaMET) requires a multi-stage data-reduction pipeline: fitting Euclidean correlators for hadronic matrix elements, renormalizing the resulting matrix elements, extending and Fourier-transforming them to momentum space, matching to light-cone distributions in perturbation theory, and extrapolating to the continuum, infinite-volume, and physical-mass limits. Several of these stages are procedurally fixed once a scheme is chosen, but others require a physicist to judge fit windows, ansatz choices, and model-averaging strategies from the data itself, which makes the full pipeline slow to execute and difficult to reproduce across practitioners. We present \lamet, an open-source large language model (LLM) agent framework that formalizes this pipeline as a declarative, job-based manifest and exposes each analysis stage as a registry of typed numerical tools. A tool-calling LLM loop drives the stages that require strategy selection, guided by stage-local ``skill'' prompts that encode the underlying physics heuristics, while stages that are procedurally fixed run as deterministic tool pipelines. We describe the resulting architecture, validate the agent-in-the-loop correlator-fitting stage on synthetic two-point-function data, and outline its application to an end-to-end pion quasi-parton-distribution-function (quasi-PDF) workflow in the Coulomb-gauge formulation of LaMET. This paper documents the design and first release, \lamet\ v1.0, of the framework.

        Speaker: Dr 殿君 赵 (CUHK(SZ))
      • 14:50
        N-point correlation functions on ancilla-free quantum circuits and neural networks 20m

        The n-point real-time correlation function is pivotal for establishing connections between experimental observations and theoretical predictions using field theories. Conventional methods for computing n-point correlation functions on quantum computers generally require an ancilla qubit that controls the entire system -- an approach that poses challenges for digital quantum devices with limited qubit connectivity, as well as for analog quantum platforms lacking controlled operations. Here, we introduce a method to compute n-point correlation functions using only unitary evolutions on the system of interest, thereby eliminating the need for ancillas and the control operations. We demonstrate our protocol on IBM quantum hardware up to 12 qubits to measure the single-particle spectrum of the Schwinger model and the out-of-time-order correlator (OTOC) in the transverse-field Ising model, where the noiseless simulation results are successfully reproduced from the noisy hardware. Additionally, I will talk about our recent work on predicting the long-time dynamics of the correlation function from short-time quantum data using NeuralODE.

        Speaker: Dr 啸洋 王
      • 15:10
        Diffusion Sampler For Lattice Field Theory 15m

        Sampling algorithms for lattice field theories face persistent efficiency challenges near the continuum limit, including critical slowing down and, in certain fermionic theories, poor ergodicity across degenerate vacua. Generative diffusion models, recently shown to correspond to stochastic quantization, offer a promising alternative and have been demonstrated for scalar and pure gauge theories; their extension to fermionic systems, central to full QCD with dynamical quarks, has remained largely unexplored.

        We present a diffusion-based sampler for the two-dimensional Gross-Neveu model, a four-fermion lattice theory. The sampler is combined with an exact Monte Carlo correction step, guaranteeing unbiased sampling from the target distribution. We validate the method in the asymptotically free regime and across the finite-volume crossover, with observables cross-checked against an independent reference implementation. This work extends diffusion-based sampling to the fermionic sector and suggests a possible route toward accelerating simulations with dynamical fermions.

        Speaker: Mr 川杨 李 (Swansea University)
      • 15:25
        High-Performance Implementation of Multigrid Solver for Lattice QCD 15m

        We have independently implemented a multigrid solver for propagator calculation for Lattice QCD. Compared to existing implementations from abroad, this project features a flatter structure and lower complexity, while offering greater autonomy and control. At the current stage, performance in common application scenarios is approaching the level of advanced international implementations, with the potential for further performance enhancements and the addition of unique features. The project is hosted at "https://github.com/ZhangXin8069/PyQCU".

        Speaker: Mr 鑫 张 (中国科学院近代物理研究所)
      • 15:40
        Computing hadron structure with ancilla-free quantum circuits 15m

        Computing hadron structure with ancilla-free quantum circuits

        Speaker: Mr 居正 梁
      • 15:55
        Pion Transition Form Factor in Lattice QCD 15m

        We investigate the neutral pion transition form factor $F_{\pi^0\gamma^\ast\gamma^\ast}(q_1^2,q_2^2)$ in lattice QCD and confirm that the connected and disconnected contributions, in the short-distance regime with a fixed time integration, have the same sign. We employ the recently proposed blending method, which supplies an unbiased and cheap estimators for the required all-to-all propagators.
        The external pion states are treated within the distillation framework, while the electromagnetic currents are evaluated via blending method.
        Numerical tests are performed on an $N_f=2+1$ lattice ensemble. Our result shows that the contribution of the disconnected part is approximately $1\%$ of that of the connected part and enables constructive interference of probability amplitudes.

        Speaker: Mr 世皓 苏 (中国科学院近代物理研究所)
      • 16:10
        Electromagnetic form factors and radii of charmed mesons from lattice QCD 15m

        Using $N_f = 2+1$ clover fermions across six gauge ensembles generated by the CLQCD collaboration, this work performs simultaneous chiral and continuum extrapolations to determine the electromagnetic properties of charmed mesons, providing the first lattice QCD calculations for the magnetic moments and radii of $D^{\ast+}$ and $D_s^\ast$, and filling the gap for the $D_s^*$ charge radius. The preliminary numerical results yield the charge radii squared as $(r_c)_D^2=0.208(26)~\text{fm}^2$, $(r_c)_{D^{\ast+}}^2=0.258(25)~\text{fm}^2$, $(r_c)_{D_s}^2=0.083(17)~\text{fm}^2$, and $(r_c)_{D^{\ast}_s}^2=0.101(15)~\text{fm}^2$; the magnetic dipole moments as $(G_M)_{D^{\ast+}}=2.21(17)$ and $(G_M)_{D_s^{\ast+}}=2.19(12)$; and the magnetic radii squared as $(r_m)_{D^{\ast+}}^2=103(84)~\text{fm}^2$ and $(r_m)_{D_s^{\ast}}^2=0.088(54)~\text{fm}^2$.

        Speaker: Mr 文正 侯 (south china normal university)
      • 16:25
        \Xi to \Lambda form factor 15m

        We present a first-principles lattice QCD calculation of $\Xi^{-} \to \Lambda $ form factors using $2+1$ flavor gauge ensembles with lattice spacings ranging from 0.06 to 0.1 fm and pion masses between 230 and 340 MeV. This decay provides an independent avenue for determining the Cabibbo--Kobayashi--Maskawa matrix element $|V_{us}|$ in the baryon sector. We determine the full set of vector and axial-vector transition form factors and their $q^{2}$ dependence, followed by a combined chiral and continuum extrapolation to the physical point. Our preliminary prediction for the electron-channel branching fraction is consistent with the recent BESIII measurement, which lies 3.9 standard deviations below the previous world average.

        Speaker: Mr 付伟 张 (Inner Mongolia University)
      • 16:40
        Constraining DVCS Compton Form Factors Using Lattice QCD informed Neural Network 15m

        The lattice QCD calculation of generalized form factors are exploited to determine the subtraction
        constants through all order dispersion relations of Deeply Virtual Compton Scattering (DVCS). The
        leading order relation is found to constrain significantly the real part of the Compton Form Factors
        (CFFs), and the higher order one reduces considerably both the real and imaginary part of CFFs
        in a global analysis of proton data. This is realized by a synthesis of the DVCS data and LQCD
        calculations within a neural network framework, whose architecture is specifically designed for a
        reliable extrapolation to unmeasured kinematic regime. By leveraging dispersion relations beyond
        leading order, our framework allows for adding higher moments of generalized parton distributions
        from LQCD into the extraction of CFFs from DVCS data.

        Speaker: Mrs 源源 黄 (南京师范大学)
    • 16:55 → 17:25
      Tea break 30m
    • 17:25 → 17:45
      下届年会介绍 20m CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Speaker: Prof. 雨 孟
    • 17:45 → 18:05
      学生报告颁奖 & 闭幕致辞 20m CXII401 (会议楼2)

      CXII401

      会议楼2

      香港中文大学(深圳)
      Speaker: Prof. 莹 陈
    • 18:05 → 19:30
      自助晚餐 1h 25m 大堂吧 (中海凯骊酒店)

      大堂吧

      中海凯骊酒店

      深圳市龙岗区体育新城大运路168号
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