Light-quark connected intermediate-window contributions to the muon g-2 hadronic vacuum polarization from lattice QCD

Bazavov, A. et al. (2023) Light-quark connected intermediate-window contributions to the muon g-2 hadronic vacuum polarization from lattice QCD. Physical Review D, 107(11), 114514. (doi: 10.1103/PhysRevD.107.114514)

Abstract

We present a lattice-QCD calculation of the light-quark connected contribution to window observables associated with the leading-order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon, aμHVP,LO . We employ the MILC Collaboration’s isospin-symmetric QCD gauge-field ensembles, which contain four flavors of dynamical highly-improved-staggered quarks with four lattice spacings between a ≈ 0.06 – 0.15 ~fm and close-to-physical quark masses. We consider several effective-field-theory-based schemes for finite-volume and other lattice corrections and combine the results via Bayesian model averaging to obtain robust estimates of the associated systematic uncertainties. After unblinding, our final results for the intermediate and "W2’’ windows are aμll,W(conn.)=206.6(1.0)×10−10 and aμll,W2(conn.)=100.7(3.2)×10−10, respectively.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: McNeile, Dr Craig and Lytle, Dr Andrew and DeTar, Professor Carleton and Davies, Professor Christine
• Authors: Bazavov, A., Davies, C., DeTar, C., El-Khadra, A. X., Gámiz, E., Gottlieb, S., Jay, W. I., Jeong, H., Kronfeld, A. S., Lahert, S., Lepage, G. P., Lynch, M., Lytle, A. T., Mackenzie, P. B., McNeile, C., Neil, E. T., Peterson, C. T., Ray, G., Simone, J. N., Van de Water, R. S., and Vaquero, A.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review D
• Publisher: American Physical Society
• ISSN: 2470-0010
• ISSN (Online): 2470-0029
• Published Online: 20 June 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Physical Review D 107(11):114514
• Publisher Policy: Reproduced under a Creative Commons licence

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
306883		Research in Particle Physics Theory - Phenomenology from lattice QCD and collider physics	Christine Davies	Science and Technology Facilities Council (STFC)	ST/T000945/1	P&S - Physics & Astronomy