ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Arman Esmaili Taklimi (Unicamp)
Title: Indirect Dark Matter Detection in the Light of Sterile Neutrinos
Date (JST): Wed, Jun 13, 2012, 13:30 - 14:30
Place: Seminar Room A
Related File: 663.pdf
Abstract: The recent global fit of short baseline neutrino oscillation data and LSND/MiniBooNE results favor the presence of one (or more) sterile neutrino state which leads to new mass splitting \Delta m^2 ~1 eV^2. In this talk I discuss the effect of these new states on the evolution of neutrinos from the dark matter annihilation inside the Sun. I show that neutrinos with energy E_\nu > 100 GeV undergo resonant active-sterile oscillation which depletes the flux of neutrinos arriving at the Earth. As an example of this effect, the oscillation probabilities for the case of monochromatic neutrinos from the direct annihilation of dark matter particles to neutrinos will be presented and the depletion due to the presence of sterile neutrinos will be discussed.