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Durham University

Department of Mathematical Sciences

Academic Staff

Publication details for Professor Steven Abel

Abel, Steven & Khoze, Valentin V. (2016). Photo-production of a 750 GeV di-photon resonance mediated by Kaluza-Klein leptons in the loop. Journal of High Energy Physics 2016(5): 063.

Author(s) from Durham


We consider the phenomenology of a 750 GeV resonance X which can be produced at the LHC by only photon fusion and subsequently decay into di-photons. We propose that the spin-zero state X is coupled to a heavy lepton that lives in the bulk of a higher-dimensional theory and interacts only with the photons of the Standard Model. We compute the di-photon rate in these models with two and more compact extra dimensions and demonstrate that they allow for a compelling explanation of the di-photon excess recently observed by the ATLAS and CMS collaborations. The central role in our approach is played by the summation over the Kaluza-Klein modes of the new leptons, thus providing a significant enhancement of the X→γγ loops for the production and decay subprocesses. It is expected that the jet activity accompanying these purely electromagnetic (at the partonic level) processes is numerically suppressed by factors such as α2emCqq¯/Cγγ∼10−3.