Which fraction of the measured cosmic-ray antiprotons might be due to neutralino annihilation in the galactic halo?

Details Which fraction of the measured cosmic-ray antiprotons might be due to neutralino annihilation in the galactic halo? Which fraction of the measured cosmic-ray antiprotons might be due to neutralino annihilation in the galactic halo?

1998-04-14

arxiv.org/abs/astro-ph/9804137v1

Phys.Rev.D58:123503,1998

Astronomy and Astrophysics

Astrophysics

25 pages, ReVTeX, 18 figures (high resolution figures available upon request)

Scientific paper

10.1103/PhysRevD.58.123503

We analyze the data of low-energy cosmic-ray antiproton spectrum, recently published by the BESS Collaboration, in terms of newly calculated fluxes for secondary antiprotons and for a possible contribution of an exotic signal due to neutralino annihilation in the galactic halo. We single out the relevant supersymmetric configurations and discuss their explorability with experiments of direct search for particle dark matter and at accelerators. We discuss how future measurements with the Alpha Magnetic Spectrometer (AMS) on the Shuttle flight may disentangle the possible neutralino-induced contribution from the secondary one.

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