Strangeness and charmness content of the nucleon from overlap fermions on 2+1-flavor domain-wall fermion configurations
xQCD Collaboration
刊名PHYSICAL REVIEW D
2013
卷号88期号:1
关键词LATTICE QCD SIGMA-TERM QUARKS HEAVY MASS
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.88.014503
通讯作者Gong, M (reprint author), Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
英文摘要We present a calculation of the strangeness and charmness contents < N vertical bar(s) over bars vertical bar N > and < N vertical bar(c) over barc vertical bar N > of the nucleon from dynamical lattice QCD with 2 + 1 flavors. The calculation is performed with overlap valence quarks on 2 + 1-flavor domain-wall fermion gauge configurations. The configurations are generated by the RBC collaboration on a 24(3) x 64 lattice with sea-quark mass am(l) = 0.005, am(s) = 0.04, and inverse lattice spacing a(-1) = 1.73 GeV. Both actions have chiral symmetry which is essential in avoiding contamination due to the operator mixing with other flavors. The nucleon propagator and the quark loops are both computed with stochastic grid sources, while low-mode substitution and low-mode averaging methods are used respectively which substantially improve the signal-to-noise ratio. We obtain the strangeness matrix element fT(s) = m(s)< N vertical bar(s) over bars vertical bar N >/M-N = 0.0334(62), and the charmness content fT(c) = m(c)< N vertical bar(c) over barc vertical bar N >/M-N = 0.094(31) which is resolved from zero by 3 sigma precision for the first time.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000321275800005
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被引频次:45[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213559
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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xQCD Collaboration. Strangeness and charmness content of the nucleon from overlap fermions on 2+1-flavor domain-wall fermion configurations[J]. PHYSICAL REVIEW D,2013,88(1).
APA xQCD Collaboration.(2013).Strangeness and charmness content of the nucleon from overlap fermions on 2+1-flavor domain-wall fermion configurations.PHYSICAL REVIEW D,88(1).
MLA xQCD Collaboration."Strangeness and charmness content of the nucleon from overlap fermions on 2+1-flavor domain-wall fermion configurations".PHYSICAL REVIEW D 88.1(2013).
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