Anatomy of the rho resonance from lattice QCD at the physical point
文献类型：期刊论文
| 作者 | XQCD Collaboration |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2018 |
| 卷号 | 42期号:6页码:63102 |
| 关键词 | rho resonance leptonic decay constant renormalization |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/42/6/063102 |
| 文献子类 | Article |
| 英文摘要 | We propose a strategy to access the q (q) over bar component of the rho resonance in lattice QCD. Through a mixed action formalism (overlap valence on domain wall sea), the energy of the q (q) over bar component is derived at different valence quark masses, and shows a linear dependence on m(pi)(2). The slope is determined to be c(1)=0.505(3)GeV-1, from which the valence pi p sigma term is extracted to be sigma((val))(pi rho) = 9.82(6) MeV using the Feynman-Hellman theorem. At the physical pion mass, the mass of the q (q) over bar, component is interpolated to be m(rho) = 775.9 +/- 6.0 +/- 1.8 MeV, which is close to the rho resonance mass. We also obtain the leptonic decay constant of the q (q) over bar component to be f(rho-) = 208.5 +/- 5.5 +/- 0.9 MeV, which can be compared with the experimental value f(rho)(exP) approximate to 221 MeV through the relation f(rho)(exP) = root Z(rho)f(rho +/-), with Z(rho) approximate to 1.13 being the on-shell wavefunction renormalization of rho owing to the rho-pi interaction. We emphasize that m(rho) and f(rho) of the q (q) over bar component, which are obtained for the first time from QCD, can be taken as the input parameters of p in effective field theory studies where rho acts as a fundamental degree of freedom. |
| 电子版国际标准刊号 | 2058-6132 |
| WOS关键词 | VECTOR-MESON ; SPECTRUM ; DECAY |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6252778 |
| WOS记录号 | WOS:000433470900003 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285975]  |
| 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. Anatomy of the rho resonance from lattice QCD at the physical point[J]. CHINESE PHYSICS C,2018,42(6):63102. |
| APA | XQCD Collaboration.(2018).Anatomy of the rho resonance from lattice QCD at the physical point.CHINESE PHYSICS C,42(6),63102. |
| MLA | XQCD Collaboration."Anatomy of the rho resonance from lattice QCD at the physical point".CHINESE PHYSICS C 42.6(2018):63102. |
入库方式： OAI收割
来源：高能物理研究所
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