SEMINAR: Generating X-ray lines from annihilating dark matter

September 26 2014, 2:30pm - Seminar room

Speaker: Lucien Heurtier (CPHT Ecole Polytechnique Paris)

Abstract : After the possible discovery of a monochromatic gamma-ray line around 3.55 keV, a myriad of models where proposed to interpret it as a decaying dark matter candidate.

I will in this talk introduce the experimental results, mentioning recent discussions about the validity of the result. Then I will present our recent work in collaboration with Emilian Dudas and Yann Mambrini, in which we propose a different scenario where a keV dark matter annihilates to produce such a monochromatic signal. The process is generated through the exchange of a light scalar of mass of order 300 keV - 50 MeV coupling to photon through loops or higher dimensional operators. For natural values of the couplings and scales, the model can generate a gamma-ray line which can fit with the recently identified 3.5 keV X-ray line.


We use own and third-party cookies to improve our services by analyzing your browsing habits. If you continue browsing, we will consider that you allow us to use them. You can change the settings or get more information on our "Cookies policy".

I accept cookies from this site.