DISCRETE '08: Symposium on Prospects in the Physics of Discrete Symmetries

Session

Parallel Session B. High energy Messengers-II

15 Dec 2008, 17:00

Valencia, Spain

Conveners

Parallel Session B. High energy Messengers-II

• Mats LINDROOS (CERN)

71. Gamma rays from the annihilation of singlet scalar dark matter

Mr carlos yaguna (universidad autonoma de madrid)

15/12/2008, 17:00

Ultra-high-energy Messengers

We consider an extension of the Standard Model by a singlet scalar that accounts for the dark matter of the Universe. Within this model we compute, for the first time, the expected gamma ray flux from the annihilation of dark matter particles. In addition, an updated analysis of the parameter space of the model is presented. By enforcing the relic density constraint from the very beginning,...

117. Sterile neutrinos and low reheating temperature

Dr Sergio Palomares Ruiz (IST Lisbon)

15/12/2008, 17:20

It is commonly assumed that the cosmological and astrophysical bounds on the mixings of sterile with active neutrinos are much more stringent than those obtained from laboratory measurements. We point out that in scenarios with a very low reheating temperature T_RH << 100 MeV at the end of (the last episode of) inflation or entropy creation, the abundance of sterile neutrinos becomes...

108. Extreme scenarios of new physics in the UHE astrophysical neutrino flavour ratios

Mr Mauricio Bustamante (Pontificia Universidad Catolica del Peru)

15/12/2008, 17:40

We add an energy-independent Hamiltonian to the standard flavour oscillation one. This kind of physics might appear in theories where neutrinos couple differently to a plausible non-zero torsion of the gravitational field or more dramatically in the presence of CPT-violating physics in the flavour oscillations. If this contribution exists, experiments at higher energies are more sensitive to...