1999/02/23 by D. Fargion, R. Konoplich, Fargion, D. +5
Physics and Astronomy · #Astrophysics (astro-ph) #Condensed Matter (cond-mat) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #astro-ph #cond-mat #hep-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9902327
7 pages, IDM Conference, Buxton Sept.1998
arxiv created 1999/02/23 · arxiv updated 2009/11/30
A halo model with heavy relic neutrinos N belonging to a fourth generation and their annihilations in galactic halo may explain the recent evidence of diffused gamma (GeV) radiation around galactic plane. We considered a neutrino mass in the narrow range (MZ/2 < mN < MZ) and two main processes as source of gamma rays. A first one is ICS of ultrarelativistic electron pair on IR and optical galactic photons and a second due to prompt gammas by π0 decay, leading to a gamma flux (10-7 - 10-6 /(cm2 s sr)) comparable to EGRET detection. Our predictions are also compatible with the narrow window of neutrino mass 45 GeV < mN < 60 GeV, required to explain the recent underground DAMA positive signals.