Title: Light quark vacuum polarization at the physical point and contribution to the muon $g-2$

Abstract

We report on the computation of the connected light-quark vacuum polarization with $2+1+1$ flavors of highly improved staggered quarks [Follana et al., Phys. Rev. D 75, 054502 (2007).] fermions at the physical point and its contribution to the muon anomalous magnetic moment. Three ensembles, generated by the MILC collaboration, are used to take the continuum limit. The finite-volume correction to this result is computed in the (Euclidean) time-momentum representation to next-to-next-to-leading order (NNLO) in chiral perturbation theory. We find $a_{\mu }^{ll}\left(\mathrm{HVP}\right)=(659\pm 20\pm 5\pm 5\pm 4)\times {10}^{-10}$, where the errors are statistical and estimates of residual uncertainties from taking the continuum limit, scale setting, and truncation of chiral perturbation theory at NNLO. We compare our results with recent ones in the literature.

Authors:

Aubin, Christopher ;

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Blum, Thomas; Tu, Cheng ;

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Golterman, Maarten ;

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Jung, Chulwoo ;

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Peris, Santiago

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Publication Date:

2020-01-01

Research Org.:

San Francisco State Univ., CA (United States); Univ. of Connecticut, Storrs, CT (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:

USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:

1581673

Alternate Identifier(s):

OSTI ID: 1594605; OSTI ID: 1594849; OSTI ID: 1595686

Report Number(s):

BNL-213584-2020-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; 014503

Grant/Contract Number:  

FG02-92ER40716; FG03-92ER40711; SC0012704; CICYTFEDER-FPA2017-86989-P; 2017 SGR 1069; SC0013682; SC0010339

Resource Type:

Published Article

Journal Name:

Physical Review D

Additional Journal Information:

Journal Name: Physical Review D Journal Volume: 101 Journal Issue: 1; Journal ID: ISSN 2470-0010

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS