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Search for Resonant Production of High-Mass Photon Pairs in Proton-Proton Collisions at $\sqrt s$ =8 and 13 TeV

2016-07-28Journal article Open access
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dc.contributor.authorCMS collaboration (2263 authors)
dc.contributor.authorCalpas, Betty
dc.contributor.authorNayak, Aruna
dc.contributor.authorBargassa, Pedrame
dc.contributor.authorBeirão Da Cruz E Silva, Cristóvão
dc.contributor.authorDi Francesco, Agostino
dc.contributor.authorFaccioli, Pietro
dc.contributor.authorFerreira Parracho, Pedro Guilherme
dc.contributor.authorGallinaro, Michele
dc.contributor.authorHollar, Jonathan
dc.contributor.authorLeonardo, Nuno
dc.contributor.authorLloret Iglesias, Lara
dc.contributor.authorRodrigues Antunes, Joao
dc.contributor.authorSeixas, Joao
dc.contributor.authorToldaiev, Oleksii
dc.contributor.authorVadruccio, Daniele
dc.contributor.authorVarela, Joao
dc.contributor.authorVischia, Pietro
dc.contributor.authorDavid Tinoco Mendes, Andre
dc.contributor.authorSilva, Pedro
dc.contributor.authorMusella, Pasquale
dc.contributor.authorPela, Joao
dc.date.accessioned2019-02-04T10:24:17Z
dc.date.available2019-02-04T10:24:17Z
dc.date.issued2016-07-28
dc.date.updated2019-02-04T10:24:17Z
dc.description.abstractA search for the resonant production of high-mass photon pairs is presented. The analysis is based on samples of proton-proton collision data collected by the CMS experiment at center-of-mass energies of 8 and 13 TeV, corresponding to integrated luminosities of 19.7 and 3.3  fb-1, respectively. The interpretation of the search results focuses on spin-0 and spin-2 resonances with masses between 0.5 and 4 TeV and with widths, relative to the mass, between 1.4×10-4 and 5.6×10-2. Limits are set on scalar resonances produced through gluon-gluon fusion, and on Randall-Sundrum gravitons. A modest excess of events compatible with a narrow resonance with a mass of about 750 GeV is observed. The local significance of the excess is approximately 3.4 standard deviations. The significance is reduced to 1.6 standard deviations once the effect of searching under multiple signal hypotheses is considered. More data are required to determine the origin of this excess.
dc.description.versionPeer Reviewed
dc.identifierPhys.Rev.Lett. 117 (2016) 051802; DOI 10.1103/PhysRevLett.117.051802
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevLett.117.051802
dc.identifier.urihttp://hdl.handle.net/10400.26/27119
dc.language.isoeng
dc.titleSearch for Resonant Production of High-Mass Photon Pairs in Proton-Proton Collisions at $\sqrt s$ =8 and 13 TeV
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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