The Cosmic Ray Antiproton Spectrum and a Limit on the Antiproton Lifetime

Details The Cosmic Ray Antiproton Spectrum and a Limit on the Antiproton Lifetime The Cosmic Ray Antiproton Spectrum and a Limit on the Antiproton Lifetime

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..ses..ic01g&link_type=abstract

American Physical Society, Southeastern Section Meeting, November 13-15, 1998 Miami, Florida, abstract #IC.01

Physics

Scientific paper

Measurements of the cosmic ray \overlinep/p ratio are compared to predictions from an inhomogeneous leaky box model of Galactic secondary \overlinep production together with an updated heliospheric model that modulates the predicted fluxes measured at the Earth. [URL: Cosmic ray antiproton/proton ratio] The heliospheric corrections are crucial for understanding the low-energy part of the spectrum. The \overlinep production-propagation-modulation model agrees with observations. Adding a finite \overlinep lifetime to the model, we obtain the limit τ_\overlinep > 1.7 Myr (90% C.L.). Restrictions on heliospheric properties and the cutoff of low-energy interstellar cosmic rays are discussed.

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