A New Limit on the Antiproton Lifetime
Astrophysics
2008-11-26 v7 High Energy Physics - Phenomenology
Space Physics
Abstract
Measurements of the cosmic ray pbar/p ratio are compared to predictions from an inhomogeneous disk-diffusion model of pbar production and propagation within the Galaxy, combined with a calculation of the modulation of the interstellar cosmic ray spectra as the particles propagate through the heliosphere to the Earth. The predictions agree with the observed pbar/p spectrum. Adding a finite pbar lifetime to the model, we obtain the limit tau_pbar > 0.8 Myr (90 % C.L.).
Cite
@article{arxiv.astro-ph/9812025,
title = {A New Limit on the Antiproton Lifetime},
author = {Stephen H. Geer and Dallas C. Kennedy},
journal= {arXiv preprint arXiv:astro-ph/9812025},
year = {2008}
}
Comments
13 pages, 3 encapsulated Postscript figures, uses AASTeX; accepted by Astrophysical Journal; minor changes