Speaker
Antoni Bertólez-Martínez
(Departament de Física Quàntica i Astrofísica, Universitat de Barcelona)
Description
While electromagnetic couplings of UltraLight Dark Matter (ULDM) are the object of a wide range of experimental searches, there is no reason to believe that this is the only interaction of ULDM with the SM. In particular, the coupling with the SM weakly-interacting sector --neutrinos-- is much more unconstrained and leads to rich phenomenology.
In this talk, we present the results from a consistent cosmological evolution of neutrinophilic ULDM. In particular, this interaction predicts mass-varying neutrinos and non-trivial dynamics of the coupled fluid in the early Universe. Finally, we show how Big Bang Nucleosynthesis can be leveraged to compute consistent bounds on the neutrino-ULDM coupling, improving previous CMB constraints.
Author
Antoni Bertólez-Martínez
(Departament de Física Quàntica i Astrofísica, Universitat de Barcelona)
