Self-interacting inelastic dark matter in the light of XENON1T excess

Dutta, Manoranjan and Mahapatra, Satyabrata and Borah, Debasish and Sahu, Narendra (2021) Self-interacting inelastic dark matter in the light of XENON1T excess. Physical Review D, 103 (9). pp. 1-17. ISSN 2470-0010

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Abstract

We propose a self-interacting inelastic dark matter (DM) scenario as a possible origin of the recently reported excess of electron recoil events by the XENON1T experiment. Two quasidegenerate Majorana fermion DM particles interact within themselves via a light hidden sector massive gauge boson and with the standard model particles via gauge kinetic mixing. We also consider an additional long-lived singlet scalar, which helps in realizing correct dark matter relic abundance via a hybrid setup comprising both freeze-in and freeze-out mechanisms. While being consistent with the required DM phenomenology along with sufficient self-interactions to address the small-scale issues of cold dark matter, the model with GeV-scale DM can explain the XENON1T excess via inelastic down-scattering of the heavier DM component into the lighter one. All these requirements leave a very tiny parameter space, keeping the model very predictive for near-future experiments. © 2021 authors.

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IITH Creators:

IITH Creators	ORCiD
Sahu, Narendra	UNSPECIFIED

Item Type:

Article

Additional Information:

D. B. acknowledges the support from Early Career Research Award from DST-SERB, Government of India (Grant No. ECR/2017/001873). M. D. acknowledges Department of Science and Technology (DST), Government of India, for providing the financial assistance for the research under Grant No. DST/INSPIRE/03/2017/000032. M. D. would also like to acknowledge Tracy R. Slatyer and Katelin Schutz for useful discussion regarding self-interating dark matter.

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

24 Sep 2022 10:55

Last Modified:

24 Sep 2022 10:55

URI:

http://raiithold.iith.ac.in/id/eprint/10693