Santiago Collazo
Direct detection of fermionic sub-MeV dark matter using Xenon based detectors
Recent astrophysical analysis on Galactic scales about the distribution of dark matter provide strong hints on its nature. The evidence span from relativistic image in SgrA*, to stelar orbits at mili parsec scales, all the way to the Milky Way rotation curve and
stellar streams up to ~ 100 kpc. This predictions suggest that fermionic dark matter of sub-MeV mass can act as a proper candidate. Supposing that the dark matter candidate is a right-handed neutrino with a mass between 100 keV and 200 keV, and considering an effective electromagnetic channel of a more general four-fermion interaction, we study the ionization events rate induced by this candidate on electrons bounded to Xenon atoms. We also include the ionization form factor which characterizes the quantum mechanic physics of the atom, improving a previous model applied to the same scenario. In addition, we have computed exclusion regions ruling out different right-handed neutrino candidates and the coupling constant involved in the interaction with the bounded electron.
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Direct detection of fermionic sub-MeV dark matter using Xenon based detectors
