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from October 30, 2021 to November 2, 2021

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Home > Contribution List

## Contribution List

Displaying 60
contributions
out of
60

Session:
session1

EIC in China will primarily probe parton physics in a high-energy
proton or nucleus. However, computing partons on lattice
is a difficult task and may take years to get high precisions.
In this talk, I will consider a number of key factors
which one must control to get reliable calculations, which
include renormalization of linear divergences, taking continuum limit, creating large momentu
... More

Presented by Prof. 向东 季
on
30 Oct 2021
at
10:10 AM

Session:
session7

The charmonia decays present an ideal laboratory for testing the interplay between perturbative and nonperturbative QCD. In this talk, I focus on the all-photon decay and radiative decay of charmoina. Adopting a new method proposed recently, we perform the systematic lattice calculations on ηc/χc0→2γ and J/ψ→γηc. By using three Nf=2 twisted mass gauge ensembles with different lattice spa
... More

Presented by Dr. 雨 孟
on
2 Nov 2021
at
10:30 AM

Session:
session6

We have performed (2+1)-flavor QCD lattice simulations using the Highly Improved Staggered Quarks (HISQ) action on $N_{\sigma}=32$ and $N_{\tau}=96$ lattices. In our lattice simulations the strange quark mass is fixed to its physical quark mass $m_{s}^{\rm phy}$ and light quark mass is set to $m_{s}^{\rm phy}/10$ which corresponds to $M_{\pi} \approx $ 220 MeV at zero temperature. We have studied
... More

Presented by Dr. Sheng-Tai LI
on
1 Nov 2021
at
4:00 PM

Session:
session4

In this work we present the transversity $b_{\perp}$-dependence Collins-Soper kernel extracted from pion transverse momentum dependent wave functions in the framework of large momentum effective theory from lattice QCD. We use clover fermion action with $2 + 1 + 1$ flavors of highly improved staggered quarks (HISQ), generated by MILC Collaboration. A single ensemble is used, with lattice spacing $
... More

Presented by 旻寰 楚
on
31 Oct 2021
at
4:30 PM

Session:
session4

In this talk I will present the novel relations between the quark mass derivatives [$\partial^n \rho(\lambda,m_l)/\partial m_l^n$] of the Dirac eigenvalue spectrum and the $(n+1)$-point correlations among the eigenvalues. Using these relations we present lattice QCD results for $\partial^n \rho(\lambda,m_l)/\partial m_l^n$ ($n=1, 2, 3$) for $m_l$ corresponding to pion masses $m_\pi=160-55~$MeV, an
... More

Presented by Dr. 瑜 张
on
31 Oct 2021
at
4:50 PM

Session:
session4

We present the first lattice QCD calculation of the distribution amplitudes of longitudinally and transversely polarized vector mesons K∗ and φ using large momentum effective theory. We use the clover fermion action on three ensembles with 2+1+1 flavors of highly improved staggered quarks (HISQ) action, generated by MILC collaboration, at physical pion mass and {0.06, 0.09, 0.12} fm lattice spa
... More

Presented by Dr. 俊 华
on
31 Oct 2021
at
4:00 PM

Session:
session1

Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as nuclei. As a future high energy nuclear physics project, an Electron-ion collider in China (EicC) has been proposed. It will be constructed based on an upgraded heavy-ion accelerator, High Intensity heavy-ion Accelerator Facility (HIAF) which is currently under construction, t
... More

Presented by Prof. 宇翔 赵
on
30 Oct 2021
at
10:50 AM

Session:
session6

We present results on the second-order fluctuations of and correlations among net baryon number, electric charge, and strangeness in (2+1)-flavor lattice QCD in the presence of a background magnetic field. We extended our previous simulations with pion mass $m_\pi=$220 MeV [1] to physical pion mass $m_\pi=140$ MeV. Simulations are performed on $32^3\times8$ lattices using the highly improved stagg
... More

Presented by Dr. Junhong LIU
on
1 Nov 2021
at
3:30 PM

Session:
session2

This is a brief review of lattice studies on hadron spectroscopy in China. The opportunities and challenges will be discussed also.

Presented by Prof. 莹 陈
on
30 Oct 2021
at
3:00 PM

Session:
session2

I will briefly review the history and status of the lattice QCD calculation of the hadron structure in China, and discuss the present plan to reach the next milestone.

Presented by Prof. Yi-Bo YANG
on
30 Oct 2021
at
3:30 PM

Session:
session7

The measurement of muonic-hydrogen spectroscopy provides the most precise determination of the proton charge radius, where the two-photon exchange contribution plays an important role in the understanding of μH spectroscopy. We will report a lattice QCD calculation of the two-photon exchange contribution by constructing the proton four-point correlation function.

Presented by 杨 傅
on
2 Nov 2021
at
11:50 AM

Session:
session8

The solve of Dirac equation for light quarks in lattice QCD suffered from the critical mass slowing down problem, which can be solved by the recently developed multigrid method. In this talk, I will discuss the techniques and algorithms in lattice QCD gauge configuration generation, and combine the HMC and multigrid algorithm to speed up the gauge configuration generation at near physical point.

Presented by Prof. 玮 孙
on
2 Nov 2021
at
4:00 PM

Session:
session7

The two neutral kaon states in nature, the $K_L$ (long-lived) and $K_S$ (short-lived) mesons, are the two time-evolution eigenstates of the $K^0 - \overline{K^0}$ mixing system. The prediction of their mass difference $\Delta m_K$ based on the standard model is an important goal of lattice QCD. In this talk, I will present the preliminary results from a calculation performed on an ensemble of $64^
... More

Presented by Dr. Bigeng WANG
on
2 Nov 2021
at
9:30 AM

Session:
session8

We perform a lattice implement of $\xi$ gauge, a more general covariant gauge. We will present the performance of our lattice realization in $\xi$ gauge and primary results of gluon propagators and dynamical overlap quark propagators with $\xi \in [0, 0.2]$. We calculate several renormalization constants under $\xi$ gauge configurations and discuss the gauge invariance under the MS-bar scheme thro
... More

Presented by 春江 施
on
2 Nov 2021
at
4:50 PM

Session:
session3

The three-particle quantization condition on the lattice is written down in a manifestly relativistic-invariant form by using a generalization of the non-relativistic effective field theory (NREFT) approach. A partial diagonalization of the quantization condition into the various irreducible representations of the (little groups of the) octahedral group has been carried out both in the center-of-m
... More

Presented by 锦毅 庞
on
31 Oct 2021
at
9:30 AM

Session:
session8

We study the inverse problem of reconstructing spectral functions from Euclidean correlators via machine learning. We propose a novel neutral network, sVAE, which is based the variational autoencoder (VAE) and can be naturally applied to study the inverse problem. The prominent feature of the sVAE is that a Shannon-Jaynes entropy term having the ground truth values of spectral functions as prior i
... More

Presented by 世阳 陈
on
2 Nov 2021
at
4:30 PM

Session:
session3

A pair of triply charmed baryons, $Ω_{ccc}Ω_{ccc}$, is studied as an ideal dibaryon system by $(2+1)$-flavor lattice QCD with nearly physical light-quark masses and the relativistic heavy quark action with the physical charm quark mass. The spatial baryon-baryon correlation is related to their scattering parameters on the basis of the HAL QCD method. The $Ω_{ccc}Ω_{ccc}$ in the $^1S_0$ channel
... More

Presented by Yan LYU
on
31 Oct 2021
at
11:00 AM

Session:
session3

We perform an exploratory study of glueballs on two RBC/UKQCD gauge ensembles with the $N_f=2+1$ physical quark masses at two lattice spacings. The statistical uncertainties of the glueball correlation functions are considerably reduced through the cluster decomposition error reduction (CDER) method. The Bethe-Salpeter wave functions are obtained for the scalar, tensor and pseudoscalar glueballs b
... More

Presented by 飞宇 陈
on
31 Oct 2021
at
11:20 AM

Session:
session8

We will present how to calculate propagators on Chroma with overlap and HISQ (highly improved staggered quark) valence quark, which are not fully supported on Chroma before. For overlap, we setup the fermion action based on polynomials of hwilson action, create overlap dslash on QUDA, migrate Arnoldi algorithm from gwu-code to solve the eigensystem for deflation, and migrate multishift algorithm t
... More

Presented by 宽 张
on
2 Nov 2021
at
5:10 PM

Session:
session6

In this talk, I would like to discuss recent progress in studies of QCD at finite temperature and densities within the functional renormalization group (fRG) approaches, e.g., the QCD phase structure, QCD equation of state, baryon number fluctuations, spectral functions, real-time dynamics, etc. The relevant results are compared with those obtained from recent lattice simulations. The fRG is a non
... More

Presented by Prof. 伟杰 付
on
1 Nov 2021
at
2:00 PM

Session:
session6

In this talk I will report our recent lattice calculations on the heavy quark diffusion in the hot medium. The calculations are carried out in the quenched approximation on large, fine, isotropic lattices. The quark masses cover physical charm quark mass, physical bottom quark mass and infinite heavy quark mass.

Presented by Dr. Hai-Tao SHU
on
1 Nov 2021
at
3:00 PM

Session:
session2

BESIII is an experiment running at tau-charm energy region at the Beijing Electron Positron Collider (BEPCII). Since the first data taking in 2009, BESIII has accumulated the world’s largest data samples of D and Ds meson decays, 10 billion J/ψ and 2.7 million ψ(3686) events, and about 100 million events with center-of-mass energy between 4 and 4.9 GeV for studies of nonstandard hadrons and th
... More

Presented by Prof. Beijiang LIU
on
30 Oct 2021
at
2:00 PM

Session:
session5

We present the first Lattice QCD calculation of the quark and gluon trace anomaly contributions to the hadron masses, using the overlap fermion on the 2+1 flavor dynamical Domain wall quark ensemble. The result shows that the gluon trace anomaly contributes to most of the nucleon mass, and the contribution in the pion state is smaller than that in others.

Presented by Dr. HE FANGCHENG
on
1 Nov 2021
at
10:30 AM

Session:
session4

We present the first lattice calculation of pion valence parton distribution using matching formula at NNLO level. We use the Wilson-Clover fermion on three 2+1 flavor HISQ ensembles of lattice spacings a = 0.04, 0.06 and 0.076 fm, with two pion mass including the physical one. Two unitary Domain-Wall calculations at physical point are also presented. This allows us to control the continuum limit,
... More

Presented by Dr. 翔 高
on
31 Oct 2021
at
2:30 PM

Session:
session3

Lattice QCD is one of the most important tool to study hadron physics. The key point by using lattice QCD results to study hadron physics is to transfer lattice QCD spectrum to the observables. The famous Luscher equation provides a powerful method to connect them. We also develop an alternative method, named as Hamiltonian Effective Field Theory (HEFT) method. In this talk we will introduce it an
... More

Presented by Prof. 佳俊 吴
on
31 Oct 2021
at
9:00 AM

Lattice QCD is one of the most important tool to study hadron physics. The key point by using lattice QCD results to study hadron physics is to transfer lattice QCD spectrum to the observables. The famous Luscher equation provides a powerful method to connect them. We also develop an alternative method, named as Hamiltonian Effective Field Theory (HEFT) method. In this talk we will introduce it an
... More

Presented by Prof. Jia-jun WU