Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3137
Title: Probing grand unified theories with cosmic-ray, gamma-ray, and neutrino astrophysics
Authors: Sigl, G
Lee, S
Bhattacharjee, P
Yoshida, S
Keywords: The Highest Energy Cosmic Rays
Neutrino Propagation
Active Galactic Nuclei.
Issue Date: Apr-1999
Publisher: The American astronomical Society
Citation: Physical review D, Vol. 59, No. 4, pp. 043504
Abstract: We explore scenarios where the highest energy cosmic rays are produced by new particle physics near the grand unification scale. Using detailed numerical simulations of extragalactic nucleon, γ-ray, and neutrino propagation, we show the existence of an interesting parameter range for which such scenarios may explain part of the data and are consistent with all observational constraints. A combination of proposed observatories for ultra-high energy cosmic rays, neutrino telescopes of ≳few kilometer scale, and γ-ray astrophysics instruments, should be able to test these scenarios. In particular, for neutrino masses in the eV range, exclusive neutrino decay modes of superheavy particles can give rise to neutrino fluxes comparable to those predicted in models of active galactic nuclei.
URI: http://hdl.handle.net/2248/3137
ISSN: 0556 - 2821
Appears in Collections:IIAP Publications

Files in This Item:
File Description SizeFormat 
Probing grand unified theories with cosmic-ray166.46 kBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.