2000/05/31 by Ashok Goyal, A. Gupta, Abhinav Gupta +1
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #COSMIC cancer database #Cosmic neutrino background #Cosmic ray #Dark Matter and Cosmic Phenomena #Neutrino #Neutrino detector #Neutrino oscillation #Nuclear physics #Particle physics theoretical and experimental studies #Physics #hep-ph
paper · pdf · doi:10.1103/physrevd.63.043003
published as Phys.Rev. D63 (2001) 043003 · 16 pages Latex2e file including 4 postscript figures. Effect of brane fluctuation taken into account
arxiv created 2000/09/20 · openalex publication_date 2001/01/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
If neutrinos are to be identified with the primary source of ultrahigh energy cosmic rays (UHECR), their interaction on relic neutrinos is of great importance in understanding their long intergalactic journey. In theories with large compact dimensions, the exchange of a tower of massive spin-2 gravitons (Kaluza-Klein excitations) gives an extra contribution to \ensuremathν\ensuremathν\ensuremath→ff and \ensuremathγ\ensuremathγ processes along with the opening of a new channel for the neutrinos to annihilate with the relic cosmic neutrino background \ensuremathν\ensuremathν\ensuremath→Gkk to produce bulk gravitons in the extra dimensions. This will affect their attenuation. We compute the contribution of these Kaluza-Klein excitations to the above processes and find that for parameters of the theory constrained by supernova cooling, the contribution does indeed become the dominant contribution above √(s)\ensuremath≃300GeV.