Muon g-2 with overlap valence fermions

Gen Wang, Terrence Draper, Keh Fei Liu, Yi Bo Yang

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6 Scopus citations

Abstract

We present a lattice calculation of the leading order hadronic vacuum polarization contribution to the muon anomalous magnetic moment for the connected light and strange quarks, acon,l/sW in the widely used window t0=0.4 fm, t1=1.0 fm, Δ=0.15 fm, and also of acon,l/sS in the short distance region. We use overlap fermions on four physical-point ensembles. Two 2+1 flavor RBC/UKQCD ensembles use domain wall fermions and Iwasaki gauge actions at a=0.084 and 0.114 fm, and two 2+1+1 flavor MILC ensembles use the highly improved staggered quark and Symanzik gauge actions at a=0.088 and 0.121 fm. We have incorporated infinite volume corrections from three additional domain wall fermion ensembles at L=4.8, 6.4, and 9.6 fm and physical pion mass. For acon,lW, we find that our results on the two smaller lattice spacings are consistent with those using the unitary setup, but those at the two coarser lattice spacings are slightly different. Eventually, we predict acon,lW=206.7(1.5)(1.0) and acon,sW=26.8(0.1)(0.3), using linear extrapolation in a2, with systematic uncertainties estimated from the difference of the central values from the RBC/UKQCD and MILC ensembles.

Original languageEnglish
Article number034513
JournalPhysical Review D
Volume107
Issue number3
DOIs
StatePublished - Feb 1 2023

Bibliographical note

Funding Information:
We thank the RBC/UKQCD, and MILC collaborations for providing us their gauge configurations, A. Keshavarzi for sharing their -ratio data, and F. He, C. Lehner, and L. Lellouch for valuable inputs and discussion. K. L. thanks T. Blum and A. El-Khadra for the informative discussions. Most of the production was performed using the GWU code through the HIP programming model , and the data analysis was based on the ql attice package. T. D. and K. L. are supported in part by the U.S. DOE Grant No. DE-SC0013065 and K. L. by DOE Grant No. DE-AC05-06OR23177, which is within the framework of the TMD Topical Collaboration. G. W. is supported by the French National Research Agency under the Contract No. ANR-20-CE31-0016. Y. Y. is supported in part by a NSFC-DFG joint grant under Grants No. 12061131006 and No. SCHA 458/22 and also the Strategic Priority Research Program of Chinese Academy of Sciences, Grants No. XDC01040100, No. XDB34030303, and No. XDPB15. The numerical calculations were carried out on the ORISE Supercomputer, and HPC Cluster of ITP-CAS. This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. This work used Stampede time under the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation Grant No. ACI-1053575. We also thank the National Energy Research Scientific Computing Center (NERSC) for providing HPC resources that have contributed to the research results reported in this paper. We acknowledge the facilities of the USQCD Collaboration used for this research in part, which are funded by the Office of Science of the U.S. Department of Energy.

Publisher Copyright:
© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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