High Energy Physics Seminar - Jiji Fan (Brown University) "Ultralight Repulsive Dark Matter"

March 24, 2017
Monday, March 27, 2017 - 3:00pm to 4:00pm
4138 Physics Research Building
Jiji Fan (Brown University)

Ultralight scalar dark matter with mass at or below the eV scale and above 10^{-22} eV and pressure from repulsive self-interaction could form a Bose-Einstein condensate in the early Universe and maybe in galaxies as well. It has been suggested before that this scenario may provide a possible solution to the cusp/core problem and some specific model may even explain MOND phenomenology. In this talk, I will discuss some challenges facing this scenario from the particle physics model building point of view. I will also discuss some cosmological and astrophysical constraints on ultralight repulsive dark matter in terms of a parametrization motivated by particle physics considerations.

 

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