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  • Open Access

Phases of dark matter from inverse decays

Ronny Frumkin1,2,*, Yonit Hochberg1,3,†, Eric Kuflik1,3,‡, and Hitoshi Murayama4,5,6,§

  • *Contact author: ronny.frumkin@weizmann.ac.il
  • †Contact author: yonit.hochberg@mail.huji.ac.il
  • ‡Contact author: eric.kuflik@mail.huji.ac.il
  • §Contact author: hitoshi@berkeley.edu, hitoshi.murayama@ipmu.jp
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Phys. Rev. D 112, 035025 – Published 19 August, 2025

DOI: https://doi.org/10.1103/987q-fhb6

Abstract

Inverse decays are an interesting avenue for producing dark matter in the early Universe. We study in detail various phases of dark matter parameter space where inverse decays control its abundance, expanding on our work of inverse decay (INDY) dark matter and going beyond. The role of initial conditions and the impact of departure from kinetic equilibrium are investigated as well. We show how these inverse decay phases can arise in theories of a kinetically mixed dark photon and dark Higgs, with promising prospects for detection at upcoming experiments.

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Phys. Rev. D 112, 035025– Published 19 August, 2025
  • Received 14 May 2025
  • Accepted 15 July 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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