This talk provides a systematic overview of recent progress in lattice QCD studies of transverse momentum distributions within the framework of large-momentum effective theory. Particular attention is given to first-principles determination of the Collins–Soper kernel, intrinsic soft function, and TMDPDFs with different polarization, such as unpolarized TMDPDF, Boer-Mulders function and so on....
The lattice QCD computation of parton distributions within the framework of large momentum effective theory (LaMET) constitutes a first-principles approach to studying hadron structures. Building upon preceding studies, we have developed and partly implemented lattice methodologies for calculating the leading twist LCDAs of light baryons under the LaMET formalism over the past few years. In...
In this talk, I would introduce a lattice calculation on the charmed P → V semileptonic decay.
We introduce subtracted GEVP, a method which is designed to suppress the contamination of excited states and increase the SNR of conventional GEVP. We will show its mathematical mechanism and its detailed analysis on real lattice data, along with some novel applications.
Obtaining hadron masses and matrix elements using Lattice QCD can suffer from kinds of systematic uncertainties. I will introduce the recent developments on CLQCD ensembles for better controls on systematic uncertainties from kinds of origins, and also preliminary investigation on the QED correction using the improved QED$_{\rm L}$ scheme.
Using the anisotropic relativistic fermion action on isotropic lattice, we present a systematic study of the masses and lepton decay constants of the mesons with the bottom quark based on the 2+1 flavor tadpole improved clover ensembles at different lattice spacings from 0.05 to 0.11 fm, various pion masses from 130 to 360 MeV, and several values of the strange quark mass. We also propose a...
Shear and bulk viscosities are two key transport coefficients that characterize the fundamental properties of quark-gluon plasma.They quantify the response of the energy-momentum tensor to shear flow and divergent flow,serving as crucial input parameters for the phenomenological and transport models that interpret experimental data, such as the elliptic flow $v_2$.
$\quad$ However, calculating...
We report a latest lattice QCD study of the electromagnetic form factors of $\Sigma_c^0$, $\Sigma_c^{++}$ and $\Omega_c^0$. Relevant physical quantities such as electric and
magnetic charge radii and magnetic moment are extracted. We also investigate the individual quark sector contributions to the charge
radii and the magnetic moments. This work employs three gauge ensembles generated by...
Determining the location of the Quantum Chromodynamics (QCD) critical endpoint (CEP) is a central goal in high-energy nuclear physics. Direct lattice QCD simulations are hindered by the sign problem at finite baryon chemical potential ($\mu_B$), necessitating indirect approaches. Recent first-principles lattice investigations, particularly those analyzing Lee-Yang edge singularities from...
We present a lattice QCD study of the chiral properties of (2+1)-flavor QCD in background magnetic fields at zero temperature with physical pion masses. Simulations are performed using the highly improved staggered quark (HISQ) action across four different lattice spacings to enable a controlled continuum extrapolation. We compute the renormalized chiral condensates, pseudoscalar meson masses,...
We present the results of lattice QCD calculation of all leading-twist x-dependent Light-cone Distribution Amplitudes (LCDAs) for baryons in light octet, within the framework of Large-momentum Effective Theory (LaMET). We implement a novel Hybrid renormalization scheme for baryon nonlocal operators, and perform simulations at 4 different lattice spacings a = {0.052, 0.068, 0.077, 0.105} fm,...
We present the first lattice QCD results of quadratic fluctuations and correlations of conserved charges in (2+1)-flavor lattice QCD in the presence of a background magnetic field. The simulations were performed using the Highly Improved Staggered Quarks with physical pion mass $m_\pi$ = 135 MeV on $N_\tau=8$ and 12 lattices. We find that the correlation between net baryon number and electric...
Lattice QCD provides a first-principles framework for solving Quantum Chromodynamics (QCD). However, its application to off-shell partons has been largely restricted to the Landau gauge, as achieving high-precision $\xi$-gauge fixing on the lattice poses significant challenges. Motivated by a universal power-law dependence of off-shell parton matrix elements on gauge-fixing precision in the...
We employed a novel "blending method" to investigate the quark spin contributions in the octet baryons. Our lattice QCD calculations were performed on three ensembles, covering two pion masses and two lattice spacings. The sea quark contribution to the quark spin is found to observe SU(3) flavor symmetry to a good approximation within error. In contrast, the valence quark contribution exhibits...
We report a new high precision calculation of the isospin vector charge $g_{S,T}$ of the nucleon using recently proposed ``blending" method which provides a high-accuracy stochastic estimate of the all-to-all fermion propagator. By combining the current-inspired interpolation field, which can efficiently cancel the major excited state contamination, we found that both $g_{S}$ and $g_T$ have...
We present the physical quark masses and low energy constants using gauge ensembles with 2+1+1 flavors Highly Improved Staggered Quark, using the clover valence fermion. The bare strange-quark mass is fixed from the ηs mass, and the bare charm-quark mass is obtained from the Ds meson mass.
W e have investigated various approaches to address the potential inverse problem involved in the limited inverse Fourier transform of quasi-distributions. The methods explored include the Tikhonov regularization method, the Backus–Gilbert method, the Bayesian approach, and genetic algorithms coupled with artificial neural networks. Using both simulated data and actual lattice data, we tested...
We present a lattice QCD calculation of the Collins-Soper kernel, which governs the rapidity evolution of transverse-momentum-dependent (TMD) distributions, using Large Momentum Effective Theory (LaMET). Quasi-TMD wave functions are computed with three meson momenta on CLQCD configurations (multiple lattice spacings and pion masses) employing clover quarks and varied hadronic states. HYP...
Transverse-momentum-dependent parton distribution functions (TMDPDFs) are important in revealing the 3D structure of hadrons. Among these distributions, the T-odd Boer-Mulders TMDPDF describes the transversely polarized quark distribution in an unpolarized hadron. Within large-momentum effective theory, I show a lattice calculation of both nucleon and pion Boer-Mulders functions. The...
We calculate the nucleon mass in a manifestly relativistic baryon chiral perturbation theory up to the leading two-loop order. Through dimensional counting analysis, we perform the chiral expansion and verify the validity of the extended-on-mass-shell scheme at the two-loop level. As a result, we obtain the complete chiral representation of the nucleon mass up to $\mathcal{O}(p^5)$, which...
We present a lattice QCD study of two-baryon systems with strangeness $S=-2$, focusing on the $\Lambda\Lambda$ and $\Xi N$ interactions, which are essential for determining the existence of the H-dibaryon. Our calculations are performed on $N_f=2+1$ CLQCD Wilson-Clover configurations, with lattice spacings range from $a \approx 0.05-0.105~\mathrm{fm}$ and pion masses from $M_\pi \approx...
The $DD^*$ 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 $I=0$ channel and a repulsive interaction in $I=1$ channel. To investigate the contribution of the long-range potential, we perform fits using models with and without the long-range potential. We...
We present the first lattice QCD determination of both the eta and eta' masses as well as the mixing angle theta_1 by using topological charge operators. The calculation employs two state-of-the-art gauge ensembles both with physical quark masses. We obtain m_{\eta} = 0.546(43)(5) GeV, $m_{\eta'}$=0.941(54)(50) GeV, and $\theta_1 = -11.7(2.5)(1.6)^\circ$. Compared with conventional studies...
On the five ensembles generated by the CLQCD collaboration, we computed decay width of D_s^→D_s γ，D_ ^(+)→D_ ^+ γ and D_ ^(0)→D_ ^0 γ. Chiral extrapolation and lattice spacing extrapolation were performed, yielding significantly improved precission. The precision for D_ ^(+)→D_ ^+ γ was improved ten times compared to previous studies, while the precision for D_ ^(*0)→D_ ^0 γ was improved...
