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He, Fangcheng1; Leinweber, D. B.; Thomas, A. W.; Wang, P.
Chiral extrapolation of the magnetic polarizability of the neutral pion
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordPHOTON-PHOTON COLLISIONS CHARGED PION SCATTERING
AbstractThe 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.
2020
ISSN2470-0010
Volume102Issue:11Pages:114509
Cooperation Status国际
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.102.114509
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27285
CollectionSCI期刊论文
Affiliation1.[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
Recommended Citation
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.
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