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Photo-production of a 750 GeV di-photon resonance mediated by Kaluza-Klein leptons in the loop.

Abel, Steven and 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.


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.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Available under License - Creative Commons Attribution.
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Publisher statement:© The Author(s) 2016 This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Date accepted:26 April 2016
Date deposited:06 May 2016
Date of first online publication:11 May 2016
Date first made open access:No date available

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