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Implications of recent (g−2)μ measurements for MeV-GeV dark sector searches

Aleksandr Pustyntsev and Marc Vanderhaeghen

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Phys. Rev. D 112, 095001 – Published 4 November, 2025

DOI: https://doi.org/10.1103/b7wp-3vcj

Abstract

Recent theoretical and experimental studies of the muon magnetic moment indicate the absence of the previously reported discrepancy, providing a vital opportunity to constrain potential beyond the Standard Model (BSM) physics. In this work, we explore the MeV-GeV mass range, where existing exclusion limits remain relatively loose. We analyze both scalar and pseudoscalar as well as vector and axial vector mediators. We demonstrate that the new bounds are not only comparable to—but in several cases, significantly more stringent than—the constraints obtained from previous collider experiments, even when near-future projections are considered.

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Phys. Rev. D 112, 095001– Published 4 November, 2025
  • Received 24 June 2025
  • Accepted 15 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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