Strange and charm quark spins from the anomalous ward identity
文献类型：期刊论文
| 作者 | Gong, Ming1; Yang, Yi-Bo2; Liang, Jian2; Alexandru, Andrei3; Draper, Terrence2; Liu, Keh-Fei2 |
| 刊名 | Physical review d
 |
| 出版日期 | 2017-06-22 |
| 卷号 | 95期号:11页码:9 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.95.114509 |
| 通讯作者 | Gong, ming() |
| 英文摘要 | We present a calculation of the strange and charm quark contributions to the nucleon spin from the anomalous ward identity (awi). this is performed with overlap valence quarks on 2+1-flavor domain-wall fermion gauge configurations on a 24(3) x 64 lattice with lattice spacing a(-1)=1.73 gev and the light sea mass at m(pi)=330 mev. to satisfy the awi, the overlap fermion for the pseudoscalar density and the overlap dirac operator for the topological density, which do not have multiplicative renormalization, are used to normalize the form factor of the local axial-vector current at finite q(2). for the charm quark, we find that the negative pseudoscalar term almost cancels the positive topological term. for the strange quark, the pseudoscalar term is less negative than that of the charm. by imposing the awi, the strange g(a)(q(2)) at q(2)=0 is obtained by a global fit of the pseudoscalar and the topological form factors, together with g(a)(q(2)) and the induced pseudoscalar form factor h(a)(q(2)) at finite q(2). the chiral extrapolation to the physical pion mass gives delta s+delta(s) over bar=-0.0403(44)(78). |
| WOS关键词 | OVERLAP DIRAC OPERATOR ; LATTICE GAUGE-THEORY ; PROTON SPIN ; QCD ; FERMIONS ; NUCLEON |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000404023800002 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177319 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Gong, Ming |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA 3.George Washington Univ, Dept Phys, Washington, DC 20052 USA |
| 推荐引用方式 GB/T 7714 | Gong, Ming,Yang, Yi-Bo,Liang, Jian,et al. Strange and charm quark spins from the anomalous ward identity[J]. Physical review d,2017,95(11):9. |
| APA | Gong, Ming,Yang, Yi-Bo,Liang, Jian,Alexandru, Andrei,Draper, Terrence,&Liu, Keh-Fei.(2017).Strange and charm quark spins from the anomalous ward identity.Physical review d,95(11),9. |
| MLA | Gong, Ming,et al."Strange and charm quark spins from the anomalous ward identity".Physical review d 95.11(2017):9. |
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