Boosted self-interacting dark matter and XENON1T excess

Borah, D. and Dutta, M. and Sahu, Narendra and et al, . (2022) Boosted self-interacting dark matter and XENON1T excess. Nuclear Physics B, 979. pp. 1-22. ISSN 0550-3213

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Abstract

We present a self-interacting boosted dark matter (DM) scenario as a possible explanation of the recently reported excess of electron recoil events by the XENON1T experiment. The Standard Model (SM) has been extended with two vector-like fermion singlets charged under a dark U(1)D gauge symmetry to describe the dark sector. While the presence of light vector boson mediator leads to sufficient DM self-interactions to address the small scale issues of cold dark matter, the model with sub-GeV scale DM can explain the XENON1T excess via elastic scattering of boosted DM component with electrons at the detector. Strong annihilation of DM into the light mediator leads to a suppressed thermal relic. A hybrid setup of dark freeze-out and non-thermal contribution from the late decay of a scalar can lead to correct relic abundance. We fit our model with XENON1T data and also find the final parameter space consistent with self-interaction of DM, DM-electron scattering rate, as well as astrophysical and cosmological observations. A tiny parameter space consistent with all these constraints and requirements can be further scrutinized in near-future experiments. Â© 2022 The Authors

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IITH Creators:

IITH Creators	ORCiD
Sahu, Narendra	0000-0002-9675-0484

Item Type:

Article

Additional Information:

DB acknowledges the support from Early Career Research Award from the Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Gov- ernment of India (reference number: ECR/2017/001873). MD acknowledges DST, Govern- ment of India for providing the financial assistance for the research under the grant DST/IN- SPIRE/03/2017/000032. SM would like to thank K. Agashe for useful discussions

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Jun 2022 09:12

Last Modified:

29 Jun 2022 08:54

URI:

http://raiithold.iith.ac.in/id/eprint/9365