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dc.contributor.authorAllanach, Benjaminen
dc.contributor.authorBhatia, Den
dc.contributor.authorIyer, AMen
dc.date.accessioned2018-03-13T16:04:48Z
dc.date.available2018-03-13T16:04:48Z
dc.date.issued2017-09-01en
dc.identifier.issn1434-6044
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/273969
dc.description.abstractWe 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.sponsorshipThis work has been partially supported by STFC ST/L000385/1.
dc.publisherSpringer
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleDissecting Multi-Photon Resonances at the Large Hadron Collideren
dc.typeArticle
prism.number595en
prism.publicationDate2017en
prism.publicationNameEuropean Physical Journal Cen
prism.volume77en
dc.identifier.doi10.17863/CAM.11378
dcterms.dateAccepted2017-08-23en
rioxxterms.versionofrecord10.1140/epjc/s10052-017-5162-5en
rioxxterms.versionVoR*
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/en
rioxxterms.licenseref.startdate2017-09-01en
dc.contributor.orcidAllanach, Benjamin [0000-0003-4635-6830]
dc.identifier.eissn1434-6052
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idSTFC (ST/L000385/1)
cam.issuedOnline2017-09-08en


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