Chair: M. Ardid
Jordi Salvadó (IFIC, CSIC-Univ Valencia)
There is an overwhelming evidence of dark matter from its gravitational interaction, but, up to date, dark matter has not been seen in the particle physics detectors, hence, the only known force in the Dark sector is the gravitational force. Therefore, a natural first question to ask would be if the gravitational interaction in the dark matter sector is the same as in the ordinary matter...
Jan Heisig (RWTH Aachen University)
We present an interpretation of the excess in the gamma-ray emission from the center of our galaxy observed by Fermi-LAT in terms of dark matter annihilation within the scalar singlet Higgs portal model. In particular, we include the astrophysical uncertainties from the dark matter distribution and allow for unspecified additional dark matter components. We demonstrate through a detailed...
Laura lopez Honorez (VUB)
Dark matter (DM) annihilations into charged particles change the thermal history of the Universe and, as a consequence, affect the 21 cm signal. In my talk I will discuss how predicting the effect of DM strongly relies on the modeling of annihilations inside halos. Given current uncertainties on the description of the astrophysical processes driving the epochs of reionization,...
180. Confronting recent AMS-02 positron fraction and Fermi-LAT extragalactic gamma ray background measurements with gravitino dark matter
Edson Carquin Lopez (USM Valparaiso, Chile)
Recent positron flux fraction measurements in cosmic-rays (CR) made by the AMS-02 detector confirm and extend the evidence on the existence of a new (yet unknown) source of high energy electrons and positrons. We propose the gravitino dark matter with bilinear R-parity violating couplings as this source. We compute the electron, positron and γ -ray fluxes produced by each gravitino decay...