Speaker
Mr
Stefan Vogl
(Technische Universitaet Muenchen)
Description
It is well known that the annihilation of Majorana dark matter particles into
light leptons can be significantly enhanced by electromagnetic bremsstrahlung
processes, which give rise to potentially observable signal in gamma-rays.
Due to the gauge invariance, this mechanism inevitably leads to electroweak
bremsstrahlung processes, which in turn lead to the production of antiprotons even
when the leading order hadronic annihilation channels are forbidden. We investigate
the constraints on the electroweak bremsstrahlung processes from the present
measurements of the antiproton-to-proton fraction and we discuss the prospects to
observe a gamma-signal in view of the antiproton constraints.
Primary author
Mr
Stefan Vogl
(Technische Universitaet Muenchen)
Co-authors
Prof.
Alejandro Ibarra
(Technische Universitaet Muenchen)
Dr
Garny Mathias
(Technische Universitaet Muenchen)
