Orateur
Dr
Giorgio Arcadi
(LPT Orsay)
Description
We will discuss the possibility that the 750 GeV state responsible of the
diphoton excess reported by ATLAS and CMS is as well the mediator of the
interaction between the SM and a fermionic DM. In the simplest scenario in
which the resonance is a scalar or pseuodscalar SM singlet a viable DM is
mostly obtained only for a limited range of masses and only for a small
decay width of the 750 GeV resonance. The prospects for DM phenomenology
are sensitively improved in the case of a scalar resonance as part of a
complex field featuring a small pseudoscalar component such that the
diphton signal is actually originated from two pairs of collimated
photons.
