Inelastic fermion dark matter origin of XENON1T excess with muon (g − 2) and light neutrino mass

Borah, Debasish and Mahapatra, Satyabrata and Nanda, Dibyendu and Sahu, Narendra (2020) Inelastic fermion dark matter origin of XENON1T excess with muon (g − 2) and light neutrino mass. Physics Letters B, 811 (135933). pp. 1-7. ISSN 0370-2693

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Motivated by the recently reported excess in electron recoil events by the XENON1T collaboration, we propose an inelastic fermion dark matter (DM) scenario within the framework of a gauged Lμ−Lτ extension of the standard model which can also accommodate tiny neutrino masses as well as anomalous muon magnetic moment (g−2)μ. A Dirac fermion DM, naturally stabilised due to its chosen gauge charge, is split into two pseudo-Dirac mass eigenstates due to Majorana mass term induced by singlet scalar which also takes part in generating right handed neutrino masses responsible for type I seesaw origin of light neutrino masses. The inelastic down scattering of heavier DM component can give rise to the XENON1T excess for keV scale mass splitting with lighter DM component. We fit our model with XENON1T data and also find the final parameter space by using bounds from (g−2)μ, DM relic, lifetime of heavier DM, inelastic DM-electron scattering rate, neutrino trident production rate as well as other flavour physics, astrophysical and cosmological observations. A tiny parameter space consistent with all these bounds and requirements will face further scrutiny in near future experiments operating at different frontiers. © 2020 The Authors

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IITH Creators:
IITH CreatorsORCiD
Sahu, Narendra
Item Type: Article
Additional Information: DB acknowledges the support from Early Career Research Award from the Department of Science and Technology - Science and Engineering Research Board (DST-SERB), Government of India (reference number: ECR/2017/001873 ). SM thanks Anirban Karan for useful discussions. DN thanks Anirban Biswas for useful discussions.
Uncontrolled Keywords: Inelastic fermion,XENON1T collaboration,
Subjects: Physics
Physics > Sound, light and Heat
Physics > Modern physics
Divisions: Department of Physics
Depositing User: . LibTrainee 2021
Date Deposited: 23 Nov 2022 12:28
Last Modified: 23 Nov 2022 12:28
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