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  • Letter
  • Open Access

Dynamics of pseudofeebly interacting massive particles in presence of thermal dark matter

Subhaditya Bhattacharya* and Dipankar Pradhan†

Jayita Lahiri‡

  • Department of Physics, Indian Institute of Technology Guwahati, Assam-781039, India

  • Institut für Theoretische Physik, Universität Hamburg, 22761 Hamburg, Germany

  • *subhab@iitg.ac.in
  • †d.pradhan@iitg.ac.in
  • ‡jayita.lahiri@desy.de
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Phys. Rev. D 108, L111702 – Published 4 December, 2023

DOI: https://doi.org/10.1103/PhysRevD.108.L111702

Abstract

In a two-component dark matter (DM) set up, when DM1 is in equilibrium with the thermal bath, the other DM2 can be equilibrated just by sizeable interaction with DM1, even without any connection with the visible-sector particles. We show that such DM candidates (DM2) have unique “freeze-out” characteristics impacting the relic density, direct and collider search implications, and propose to classify them as pseudofeebly interacting massive particles (pFIMP). The dynamics of pFIMP is studied in a model-independent manner by solving generic coupled Boltzmann equations (cBEQ), followed by a concrete model illustration.

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Detection possibility of a pseudo-FIMP in the presence of a thermal WIMP

Subhaditya Bhattacharya, Jayita Lahiri, and Dipankar Pradhan
Phys. Rev. D 109, 095031 (2024)

Article Text

Supplemental Material

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Outline

Information

Phys. Rev. D 108, L111702– Published 4 December, 2023
  • Received 20 April 2023
  • Revised 2 October 2023
  • Accepted 14 November 2023
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