Amount of Antiprotons in Cosmic Rays due to Halo Neutralino Annihilation

Details Amount of Antiprotons in Cosmic Rays due to Halo Neutralino Annihilation Amount of Antiprotons in Cosmic Rays due to Halo Neutralino Annihilation

1994-08-30

arxiv.org/abs/hep-ph/9408392v1

Astropart.Phys. 3 (1995) 77-86

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages in Plain TeX, 7 figures included in a separate uuencoded tarred-compressed Postscript file; To appear in Astroparticl

Scientific paper

10.1016/0927-6505(94)00027-Z

We evaluate the antiproton--to--proton flux ratio which can be generated by neutralino--neutralino annihilation in the galactic halo, considering the most general compositions for the relic neutralinos and modelling the neutralino local density according to its relic abundance. We find that in the case of mixed neutralino compositions this $\bar p/p$ ratio is higher than for pure higgsinos or gauginos. It is shown how the expected improvements in sensitivity for the new measurements of the $\bar p/p$ may provide very useful information, complementary to the one obtainable with other experimental means.

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