Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-02-17
JHEP 0904:087,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
3 figures
Scientific paper
10.1088/1126-6708/2009/04/087
We propose a model of dark matter identified with a pseudo-Nambu-Goldstone boson in the dynamical supersymmetry breaking sector in a gauge mediation scenario. The dark matter particles annihilate via a below-threshold narrow resonance into a pair of R-axions each of which subsequently decays into a pair of light leptons. The Breit-Wigner enhancement explains the excess electron and positron fluxes reported in the recent cosmic ray experiments PAMELA, ATIC and PPB-BETS without postulating an overdensity in halo, and the limit on anti-proton flux from PAMELA is naturally evaded.
Ibe Masahiro
Murayama Hitoshi
Nakayama Yu
Yanagida Tsutomu T.
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