Singlet-doublet self-interacting dark matter and radiative neutrino mass

Borah, Debasish and Mahapatra, Satyabrata and Sahu, Narendra and et al, . (2022) Singlet-doublet self-interacting dark matter and radiative neutrino mass. Physical Review D, 105 (7). pp. 1-17. ISSN 2470-0010

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Abstract

Self-interacting dark matter (SIDM) with a light mediator is a promising scenario to alleviate the small-scale problems of the cold dark matter paradigm while being consistent with the latter at large scales, as suggested by astrophysical observations. This, however, leads to an underabundant SIDM relic due to large annihilation rates into mediator particles, often requiring an extension of the simplest thermal or nonthermal relic generation mechanism. In this work, we consider a singlet-doublet fermion dark matter scenario where the singlet fermion with a light scalar mediator gives rise to the velocity-dependent dark matter self-interaction through a Yukawa type attractive potential. The doublet fermion, by virtue of its tiny mixing with the singlet, can be long-lived and can provide a nonthermal contribution to the singlet relic at late epochs, filling the deficit in the thermal relic of singlet SIDM. The light scalar mediator, due to its mixing with the standard model Higgs, paves the path for detecting such SIDM at terrestrial laboratories leading to constraints on model parameters from CRESST-III and XENON1T experiments. Enlarging the dark sector particles by two more singlet fermions and one scalar doublet, all odd under an unbroken Z2 symmetry can also explain nonzero neutrino mass in scotogenic fashion. © 2022 authors. Published by the American Physical Society.

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IITH Creators:

IITH Creators	ORCiD
Sahu, Narendra	UNSPECIFIED

Item Type:

Article

Additional Information:

M. D. acknowledges Department of Science and Technology (DST), Govt. of India, for providing the financial assistance for the research under the Grant No. DST/INSPIRE/03/2017/000032. N. S. acknowledges the support from Department of Atomic Energy (DAE)-Board of Research in Nuclear Sciences (BRNS), Government of India (Ref. Number: 58/14/15/2021-BRNS/37220).

Uncontrolled Keywords:

Self-interacting dark matter (SIDM), cold dark matter paradigm, CRESST-III and XENON1T, unbroken Z2 symmetry.

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

13 Jul 2022 10:45

Last Modified:

13 Jul 2022 10:45