Graviton-induced Bremsstrahlung
Abstract
We discuss photon Bremsstrahlung induced by virtual graviton exchange in proton-proton interactions at hadronic colliders, resulting from the exchange of Kaluza-Klein excitations of the graviton. The relevant subprocesses, gg to G to e^+e^-gamma and q barq to e^+e^-gamma are discussed in both the ADD and the RS scenarios. Although two-body final states (or real graviton emission) would presumably be the main discovery channels, a search for three-body final states could be worthwhile since such events have characteristic features that could provide additional confirmation. In particular, the k_perp-distribution of the photon is in both scenarios harder than that of the Standard-model background.
Cite
@article{arxiv.hep-ph/0207221,
title = {Graviton-induced Bremsstrahlung},
author = {Erik Dvergsnes and Per Osland and Nurcan Ozturk},
journal= {arXiv preprint arXiv:hep-ph/0207221},
year = {2009}
}
Comments
24 pages, including figures. v2: Including initial-state Bremsstrahlung and photon k_perp spectra. Version to appear in PRD