Graviton-induced Bremsstrahlung
Erik Dvergsnes, Per Osland, Nurcan Ozturk
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 kperp-distribution of the photon is in both scenarios harder than that of the Standard-model background.
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