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

Abel, Steven; Khoze, Valentin V.

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


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Abstract

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.

Journal Article Type Article
Acceptance Date Apr 26, 2016
Online Publication Date May 11, 2016
Publication Date May 11, 2016
Deposit Date May 2, 2016
Publicly Available Date May 6, 2016
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2016
Issue 5
Article Number 063
DOI https://doi.org/10.1007/jhep05%282016%29063
Public URL https://durham-repository.worktribe.com/output/1383324
Related Public URLs https://arxiv.org/abs/1601.07167

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Copyright 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.






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