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Search for extra dimensions using diphoton events in 7 TeV proton–proton collisions with the ATLAS detector

2013-07-16Artigo científico Acesso aberto
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dc.contributor.authorATLAS collaboration (3012 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmaral, Pedro
dc.contributor.authorAnjos, Nuno
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDo Valle Wemans, André
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOliveira, Miguel Alfonso
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorSoares, Mara
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-03T18:28:24Z
dc.date.available2019-02-03T18:28:24Z
dc.date.issued2013-07-16
dc.date.updated2019-02-03T18:28:24Z
dc.description.abstractUsing data recorded in 2011 with the ATLAS detector at the Large Hadron Collider, a search for evidence of extra spatial dimensions has been performed through an analysis of the diphoton final state. The analysis uses data corresponding to an integrated luminosity of 2.12 fb^-1 of sqrt(s) = 7 TeV proton-proton collisions. The diphoton invariant mass spectrum is observed to be in good agreement with the expected Standard Model background. In the large extra dimension scenario of Arkani-Hamed, Dimopoulos and Dvali, the results provide 95% CL lower limits on the fundamental Planck scale between 2.27 and 3.53 TeV, depending on the number of extra dimensions and the theoretical formalism used. The results also set 95% CL lower limits on the lightest Randall-Sundrum graviton mass of between 0.79 and 1.85 TeV, for values of the dimensionless coupling k/\bar{M}_{Pl} varying from 0.01 to 0.1. Combining with previously published ATLAS results from the dielectron and dimuon final states, the 95% CL lower limit on the Randall-Sundrum graviton mass for k/\bar{M}_{Pl} = 0.01 (0.1) is 0.80 (1.95) TeV.
dc.description.versionPeer Reviewed
dc.identifierPhys.Lett. B710 (2012) 538-556; DOI 10.1016/j.physletb.2012.03.022
dc.identifier.urihttp://dx.doi.org/10.1016/j.physletb.2012.03.022
dc.identifier.urihttp://hdl.handle.net/10400.26/26068
dc.language.isoeng
dc.titleSearch for extra dimensions using diphoton events in 7 TeV proton–proton collisions with the ATLAS detector
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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LIP - AP - Física de Partículas e Astropartículas