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FIELD Phys:Particle Physics
DATE June 14 (Thu), 2018
TIME 14:00-15:30
PLACE 1423
SPEAKER Debasish Borah
HOST Chun, Eung Jin
INSTITUTE IITG
TITLE When dark matter freeze-out precedes its freeze-in: some dark matter scenarios with radiative neutrino mass
ABSTRACT

This talk discusses some scenarios where dark matter relic abundance can be generated from a hybrid of thermal as well as non-thermal contributions. Such a setup naturally arises in popular radiative seesaw models and revives the dark matter parameter space where its relic is under-abundant if only thermal freeze-out is considered. A late decay of a mother particle can fill this deficit of dark matter relic trough a non-thermal contribution (freeze-in). Due to the coupled Boltzmann equations for dark matter and mother particles, it simultaneously constrains their parameter space leading to several observational consequences at direct/indirect dark matter experiments as well as the LHC.

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