dc.contributor.author Allanach, Benjamin en dc.contributor.author Bhatia, D en dc.contributor.author Iyer, AM en dc.date.accessioned 2018-03-13T16:04:48Z dc.date.available 2018-03-13T16:04:48Z dc.date.issued 2017-09-01 en dc.identifier.issn 1434-6044 dc.identifier.uri https://www.repository.cam.ac.uk/handle/1810/273969 dc.description.abstract We examine the phenomenology of the production, at the 13 TeV Large Hadron Collider (LHC), of the production of a heavy resonance $X$, which decays via other new on-shell particles $n$ into multi- (i.e.\ three or more) photon final states. In the limit that $n$ has a much smaller mass than $X$, the multi-photon final state may dominantly appear as a two photon final state because the $\gamma$s from the $n$ decay are highly collinear and remain unresolved. We discuss how to discriminate this scenario from $X \rightarrow \gamma \gamma$: rather than discarding non-isolated photons, it is better instead to relax the isolation criterion and instead form photon jet substructure variables. The spins of $X$ and $n$ leave their imprint upon the distribution of pseudorapidity gap $\Delta \eta$ between the apparent two photon states. Depending on the total integrated luminosity, this can be used in many cases to claim discrimination between the possible spin choices of $X$ and $n$, although the case where $X$ and $n$ are both scalar particles cannot be discriminated from the direct $X \rightarrow \gamma \gamma$ decay in this manner. Information on the mass of $n$ can be gained by onsidering the mass of each photon jet. dc.description.sponsorship This work has been partially supported by STFC ST/L000385/1. dc.publisher Springer dc.rights Attribution 4.0 International * dc.rights.uri http://creativecommons.org/licenses/by/4.0/ * dc.title Dissecting Multi-Photon Resonances at the Large Hadron Collider en dc.type Article prism.number 595 en prism.publicationDate 2017 en prism.publicationName European Physical Journal C en prism.volume 77 en dc.identifier.doi 10.17863/CAM.11378 dcterms.dateAccepted 2017-08-23 en rioxxterms.versionofrecord 10.1140/epjc/s10052-017-5162-5 en rioxxterms.version VoR * rioxxterms.licenseref.uri http://creativecommons.org/licenses/by/4.0/ en rioxxterms.licenseref.startdate 2017-09-01 en dc.contributor.orcid Allanach, Benjamin [0000-0003-4635-6830] dc.identifier.eissn 1434-6052 rioxxterms.type Journal Article/Review en pubs.funder-project-id STFC (ST/L000385/1) cam.issuedOnline 2017-09-08 en
﻿

### This item appears in the following Collection(s)

Except where otherwise noted, this item's licence is described as Attribution 4.0 International