Z boson decay to photon plus Kaluza-Klein graviton: large extra dimensional bounds

Abstract

We consider the phenomenology of the decay of a Z boson into a photon and a Kaluza-Klein excitation of the graviton in the ADD model. Using LEP data, we obtain an upper bound on the branching ratio corresponding to this process of ~10^-11. We also investigate energy profiles of the process.

Comments: 6 pages, 5 figures; uses feynmp. v3: numerical results amended to reflect correction to earlier paper, other text edits; v2: references added