A New Limit on the Antiproton Lifetime
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
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.).
13 pages, 3 encapsulated Postscript figures, uses AASTeX; accepted by Astrophysical Journal; minor changes
13 pages, 3 encapsulated Postscript figures, uses AASTeX; accepted by Astrophysical Journal; minor changes