Chiral extrapolation of the magnetic polarizability of the neutral pion
文献类型：期刊论文
| 作者 | He, Fangcheng1; Leinweber, D. B.; Thomas, A. W.; Wang, P. |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2020 |
| 卷号 | 102期号:11页码:114509 |
| ISSN号 | 2470-0010 |
| 关键词 | PHOTON-PHOTON COLLISIONS CHARGED PION SCATTERING |
| DOI | 10.1103/PhysRevD.102.114509 |
| 英文摘要 | The magnetic polarizability of the neutral pion has been calculated in the background magnetic-field formalism of lattice QCD. In this investigation, the chiral extrapolation of these lattice results is considered in a formalism preserving the exact leading nonanalytic terms of chiral perturbation theory. The n(f) = 2 + 1 numerical simulations are electro-quenched, such that the virtual sea quarks of the QCD vacuum do not interact with the background field. To understand the impact of this, we draw on partially quenched chiral perturbation theory and identify the leading contributions of quark-flow connected and disconnected diagrams. While electro-quenching does not impact the leading-loop contribution to the magnetic polarizability, the loops which generate the leading term have yet to be considered in lattice QCD simulations. Lattice QCD results are used to constrain the analytic terms in the chiral expansion and supplementing those with the two-loop result from chiral perturbation theory enables an evaluation of the polarizability at the physical quark mass. The resulting magnetic polarizability of the neutral pion is beta(pi 0) = 3.44(19)(stat)(37)(syst) x 10(-4) fm(3), which lies just above the 1 sigma error bound of the experimental measurement. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27285]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.[He, Fangcheng; Wang, P.] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China 3.Leinweber, D. B.] Univ Adelaide, Ctr Subat Struct Matter CSSM, Dept Phys, Adelaide, SA 5005, Australia 4.Thomas, A. W.] Univ Adelaide, Dept Phys, CoEPP, Adelaide, SA 5005, Australia 5.Thomas, A. W.] Univ Adelaide, Dept Phys, CSSM, Adelaide, SA 5005, Australia 6.Wang, P.] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Fangcheng,Leinweber, D. B.,Thomas, A. W.,et al. Chiral extrapolation of the magnetic polarizability of the neutral pion[J]. PHYSICAL REVIEW D,2020,102(11):114509. |
| APA | He, Fangcheng,Leinweber, D. B.,Thomas, A. W.,&Wang, P..(2020).Chiral extrapolation of the magnetic polarizability of the neutral pion.PHYSICAL REVIEW D,102(11),114509. |
| MLA | He, Fangcheng,et al."Chiral extrapolation of the magnetic polarizability of the neutral pion".PHYSICAL REVIEW D 102.11(2020):114509. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。