Evaluation of the three-flavor quark-disconnected contribution to the muon anomalous magnetic moment from experimental data

Boito, Diogo; Golterman, Maarten; Maltman, Kim; Peris, Santiago

doi:10.1103/PhysRevD.105.093003

Title: Evaluation of the three-flavor quark-disconnected contribution to the muon anomalous magnetic moment from experimental data

Journal Article · Mon May 16 00:00:00 EDT 2022 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.105.093003· OSTI ID:1867902

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We point out that the sum of the strange-quark-connected and full three-flavor quark-disconnected contributions to the leading-order hadronic vacuum polarization contribution, $$a$$$^{LO,HVP}_{μ}$$, to the anomalous magnetic moment of the muon is a physical observable, and we provide a data-based determination of this quantity in the isospin limit. The result, 40.1(1.5) × 10^–10 or 38.7(2.0) × 10^–10, depending on which data compilation is used, serves as a target of comparison for lattice calculations of the same isospin-limit combination. Subtracting from this result the average of lattice determinations of the strange-quark-connected contribution, one also obtains an alternate determination of the isospin-limit three-flavor disconnected contribution to $$a$$$^{LO,HVP}_{μ}$$. The result of this determination, –13.3(1.5) × 10^–10 or –14.6(2.0) × 10^–10, depending on which data compilation is used, agrees well and is competitive with the most precise current lattice determination.

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Research Organization:: San Francisco State Univ., CA (United States)

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

Grant/Contract Number:: SC0013682

OSTI ID:: 1867902

Alternate ID(s):: OSTI ID: 1901603

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 105 Journal Issue: 9; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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