Strangeness and charmness content of the nucleon from overlap fermions on 2+1-flavor domain-wall fermion configurations
文献类型：期刊论文
| 作者 | xQCD Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2013 |
| 卷号 | 88期号:1 |
| 关键词 | LATTICE QCD SIGMA-TERM QUARKS HEAVY MASS |
| 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. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000321275800005 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/213559]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 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). |
入库方式： OAI收割
来源：高能物理研究所
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