第六届中国格点量子色动力学研讨会

Session

10 Oct 2026, 16:25

Conveners

Section 10: 分会场-2, Session 2

• 川 刘 ()

Contribution list Timetable

38. Control of Excited-State Contamination in Nucleon Matrix Elements Using All-to-All Fermion Propagators

Dr 志成 胡 (ITP)

10/10/2026, 16:25

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 ($N\pi$),...

18. Unpolarized Gluon PDF from Lattice QCD

Dr 春华 曾

10/10/2026, 16:45

We report a state-of-the-art lattice QCD calculation of the nucleon unpolarized gluon parton dis-
tribution function employing large-momentum effective theory. The calculation is carried out on the
2+1 flavor CLQCD ensembles with five lattice spacings a = {0.105, 0.0897, 0.0775, 0.0688, 0.0519}
fm and various pion masses ranging from 136 MeV to 317 MeV, covering nulceon momenta up to 3
GeV....

31. Gluon Helicity Distribution of the Nucleon from Lattice QCD in Continuum Limit

Mrs 诗怡 钟 (CUHK(SZ))

10/10/2026, 17:05

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...

30. Collins-Soper Kernel and Intrinsic Soft Funtion

Mr 智超 龚

10/10/2026, 17:20

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...

33. Continuum-Limit Heavy-Meson LCDAs from Lattice QCD

Mr 浩飞 高 (SJTU)

10/10/2026, 17:35

Heavy-meson light-cone distribution amplitudes are essential nonperturbative inputs for precision heavy-flavor phenomenology. We present a first-principles lattice-QCD determination of heavy-meson LCDAs in both QCD and HQET using the HQLaMET framework. Simulations on multiple ensembles enable controlled continuum, chiral, and infinite-momentum extrapolations. Improved lattice techniques...

13. Hyperons Gluon Helicity from Lattice QCD

Mr 昕然 刘 (Nanjing Normal University)

10/10/2026, 17:50

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...

6. BESIII上粲介子纯轻和半轻衰变

Mr 溢嘉 曾 (IHEP)

10/10/2026, 18:05

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$|V_{cd}|$。