Eur. Phys. J. C (2008) 55: 107-112
https://doi.org/10.1140/epjc/s10052-008-0583-9

Regular Article - Theoretical Physics

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

Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Centre for Mathematical Sciences, Wilberforce Road, Cambridge, CB3 0WA, UK

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Received: 15 January 2008
Published online: 8 April 2008

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.