Chiral extrapolation of the charged-pion magnetic polarizability with Pade approximant
文献类型：期刊论文
| 作者 | He, Fangcheng1; Leinweber, Derek B.; Thomas, Anthony W.; Wang, Ping |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2021 |
| 卷号 | 104期号:5页码:54506 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.104.054506 |
| 英文摘要 | The background magnetic-field formalism of lattice QCD has been used recently to calculate the magnetic polarizability of the charged pion. These n(f) = 2 + 1 numerical simulations are electroquenched, 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. In this case, the leading term proportional to 1/M-pi arises at tree level from L-4. To describe the results from lattice QCD, while maintaining the exact leading terms of chiral perturbation theory, we introduce a Pade approximant designed to reproduce the slow variation observed in the lattice QCD results. Two-loop contributions are introduced to assess the systematic uncertainty associated with higher-order terms of the expansion. Upon extrapolation, the magnetic polarizability of the charged pion at the physical pion mass is found to be beta(+/-)(pi) = -1.70(14)(stat)(25)(syst )x 10(-4) fm(3), in good agreement with the recent experimental measurement. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27595]  |
| 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.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 3.Leinweber, Derek B.; Thomas, Anthony W.] Univ Adelaide, Ctr Subat Struct Matter CSSM, Dept Phys, Adelaide, SA 5005, Australia |
| 推荐引用方式 GB/T 7714 | He, Fangcheng,Leinweber, Derek B.,Thomas, Anthony W.,et al. Chiral extrapolation of the charged-pion magnetic polarizability with Pade approximant[J]. PHYSICAL REVIEW D,2021,104(5):54506. |
| APA | He, Fangcheng,Leinweber, Derek B.,Thomas, Anthony W.,&Wang, Ping.(2021).Chiral extrapolation of the charged-pion magnetic polarizability with Pade approximant.PHYSICAL REVIEW D,104(5),54506. |
| MLA | He, Fangcheng,et al."Chiral extrapolation of the charged-pion magnetic polarizability with Pade approximant".PHYSICAL REVIEW D 104.5(2021):54506. |
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来源：理论物理研究所
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