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Constraining antibaryonic dark matter through correlated nucleon decay signatures

Mathew Thomas Arun1,* and Anuja Bandu Khadse2

  • *Contact author: mathewthomas@iisertvm.ac.in
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Phys. Rev. D 112, 075021 – Published 10 October, 2025

DOI: https://doi.org/10.1103/ydjh-mqzv

Abstract

Baryon number violation in the visible sector induced by antibaryonic dark matter provides a viable mechanism for low-scale baryogenesis. Two of the most sensitive probes of this scenario are neutron decay processes, such as n→ν¯+invisible and n→π0+invisible. In this work, we discuss the possible spontaneous breaking of baryon symmetry in the dark sector and the generation of di-nucleon decay processes, such as nn→ν¯ν¯ and nn→π0π0 at one loop, arising from the operators responsible for induced nucleon decays. While the induced nucleon decay rates in this model depend on the dark matter density, di-nucleon decay processes do not, providing a complementary probe of the new physics. We thus use nucleon and di-nucleon decay bounds to constrain the local density and mass of the antibaryonic dark matter.

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Outline

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Phys. Rev. D 112, 075021– Published 10 October, 2025
  • Received 27 May 2025
  • Revised 2 September 2025
  • Accepted 23 September 2025
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