Chiral extrapolation of hadronic vacuum polarization

Colangelo, Gilberto; Hoferichter, Martin; Kubis, Bastian; Niehus, Malwin; Ruiz de Elvira, Jacobo (2022). Chiral extrapolation of hadronic vacuum polarization. Physics letters. B, 825, p. 136852. Elsevier 10.1016/j.physletb.2021.136852

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We study the pion-mass dependence of the two-pion channel in the hadronic-vacuum-polarization (HVP) contribution to the anomalous magnetic moment of the muon aHVPμ, by using an Omn s representation for the pion vector form factor with the phase shift derived from the inverse-amplitude method (IAM). Our results constrain the dominant isospin-1part of the isospin-symmetric light-quark contribution, and should thus allow one to better control the chiral extrapolation of aHVPμ, required for lattice-QCD calculations performed at larger-than-physical pion masses. In particular, the comparison of the one-and two-loop IAM allows us to estimate the associated systematic uncertainties and show that these are under good control.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Theoretical Physics
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)

UniBE Contributor:

Colangelo, Gilberto, Hoferichter, Martin, Ruiz de Elvira Carrascal, Jacobo

Subjects:

500 Science > 530 Physics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

Binia Marti

Date Deposited:

23 Mar 2022 12:21

Last Modified:

05 Dec 2022 16:14

Publisher DOI:

10.1016/j.physletb.2021.136852

BORIS DOI:

10.48350/167249

URI:

https://boris.unibe.ch/id/eprint/167249

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