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

• DOI: 10.1016/j.physletb.2020.135933
• Publication Date: 2020-11-09T16:47:11Z
• Authors: Debasish Borah; Satyabrata Mahapatra; Dibyendu Nanda; Narendra Sahu
• Keywords: High Energy Physics - Phenomenology; High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO); Physics; QC1-999; 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; Astrophysics - Cosmology and Nongalactic Astrophysics; High Energy Physics - Experiment

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