Z boson decay to photon plus Kaluza–Klein graviton: large extra dimensional bounds B.C. Allanach and J.P. Skittrall Eur. Phys. J. C, 55 1 (2008) 107-112 Published online: 08 April 2008 DOI: 10.1140/epjc/s10052-008-0583-9