Speaker
Laura Lopez Honorez
(V)
Description
Dark matter candidates are getting surrounded by direct, indirect
detection searches and collider experiments. As of today, none of
these experiments have obtained an indisputable proof of the
existence of the dark matter particle and they are dreadfully
digging into their viable parameter space. One could thus ask if
there is still room for new ideas in the dark matter sector.
There has been interest recently on particle physics models that
may give rise to sharp gamma ray spectral features from dark
matter annihilation. Dark matter being supposedly electrically
neutral, it is usually challenging to build WIMP models that may
accommodate both a large cross section into gamma rays at, say,
the Galactic center, and the right dark matter abundance. In my
talk, I will discuss the case of scalar dark matter models
actually giving rise to a significant bremsstrahlung emission and
I will confront this scenario to the familiar case of a Majorana
dark matter. I will show that the scalar dark matter case the
virtual internal bremsstrahlung signal may be enhanced by a
factor of (up to) two orders of magnitude compared to the present
limits.
