格点量子色动力学在中国

1.格点量子色动力学概述经过多年努力,人们已经成功地将自然界四种基本相互作用(强、弱、电磁、引力)中的前三种统一在量子场论的框架之中,即粒子物理的标准模型(Standard Model,SM)。     

Quenched Charmed Meson Spectra Using Tadpole Improved Quark Action on Anisotropic Lattices

Charmed meson charmonium spectra are studied with improved quark actions on anisotropic lattices. We measured the pseudo-scalar and vector meson dispersion relations for four lowest lattice momentum modes with quark mass values ranging from the strange quark to charm quark with three different values of gauge coupling β and four different values of bare speed of light v. With the bare speed of light parameter v tuned in a mass-dependent way, we study the mass spectra of D, Ds, ηc, D^＊, D^＊s and J/ψ mesons. The results extrapolated to the continuum limit are compared with the experiment, and a qualitative agreement is found.     

格点QCD组态产生研究

组态是格点QCD计算的基础,本文利用开源软件Chroma产生了一组格点QCD组态,格距为0.105 fm,体积为$32^3\times 64$,π介子质量为220 MeV,格点上的夸克作用量采用Wilson clover作用量。这组组态可用于格点QCD中研究核子结构和强子谱等物理问题。