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Light-by-light contribution to the muon g−2 within the nonlocal chiral quark model with vector and axial-vector mesons

A. E. Radzhabov1 and A. S. Zhevlakov1,2

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Phys. Rev. D 112, 094008 – Published 5 November, 2025

DOI: https://doi.org/10.1103/y64b-5tfj

Abstract

The hadronic light-by-light contribution to the muon anomalous magnetic moment is calculated in the framework of a nonlocal quark model with scalar-pseudoscalar and vector–axial-vector channels. The effect of the dressing of internal photons by vector mesons is found to be tiny. As a result, the contribution from the nonstrange quark loop is aμHLbL,Loop=(93±9.9)×10−11. The total value, including meson exchanges and the contribution of strange particles, is aμHLbL=(154±12.4)×10−11.

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Phys. Rev. D 112, 094008– Published 5 November, 2025
  • Received 29 April 2025
  • Accepted 14 October 2025
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Published by the American Physical Society under the terms of the 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.

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