Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-07-18
Phys.Rev. D67 (2003) 074003
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, including figures. v2: Including initial-state Bremsstrahlung and photon k_perp spectra. Version to appear in PRD
Scientific paper
10.1103/PhysRevD.67.074003
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.
Dvergsnes Erik
Osland Per
Ozturk Nurcan
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