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작성자 CQUeST 날짜 2018-06-10
제목 [Seminar] Jun. 19 (Tue), 4:30 pm, Debasish Borah
Seminar
DATE & TIME   Jun. 19 (Tue), 4:30 pm
PLACE   R1029
SPEAKER   Debasish Borah
HOST   Stefano Scopel
INSTITUTE   Indian Institute of Technology of Guwahati
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 setup comprising of thermal freeze-out as well as non-thermal freeze-in mechanisms. 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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