Search for Nonpointing and Delayed Photons in the Diphoton and Missing Transverse Momentum Final State in 8 TeV pp Collisions at the LHC using the ATLAS Detector

dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)
dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorAbdel Khalek, S.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAben, R.en_US
dc.contributor.authorAbi, B.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLeyton, Michaelen_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorNamasivayam, Harisankaren_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorLeyton, Michaelen_US
dc.contributor.utdAuthorNamasivayam, Harisankaren_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2015-01-26T21:33:00Z
dc.date.available2015-01-26T21:33:00Z
dc.date.created2014-12-10en_US
dc.date.issued2014-12-10en_US
dc.description.abstractA search has been performed, using the full 20.3 fb⁻¹ data sample of 8 TeV proton-proton collisions collected in 2012 with the ATLAS detector at the LHC, for photons originating from a displaced vertex due to the decay of a neutral long-lived particle into a photon and an invisible particle. The analysis investigates the diphoton plus missing transverse momentum final state, and is therefore most sensitive to pair production of long-lived particles. The analysis technique exploits the capabilities of the ATLAS electromagnetic calorimeter to make precise measurements of the flight direction, as well as the time of flight, of photons. No excess is observed over the Standard Model predictions for background. Exclusion limits are set within the context of gauge mediated supersymmetry breaking models, with the lightest neutralino being the next-to-lightest supersymmetric particle and decaying into a photon and gravitino with a lifetime in the range from 250 ps to about 100 ns.en_US
dc.identifier.bibliographicCitationAad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2014. "Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector." Physical Review D - Particles, Fields, Gravitation and Cosmology 90(11):112005.en_US
dc.identifier.issn1550 7998en_US
dc.identifier.issue11en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4286
dc.identifier.volume90en_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevD.90.112005
dc.rightsCC BY 3.0 (Attribution)en_US
dc.rights©2012 CERN, for the ATLAS collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourcePhysical Review D - Particles, Fields, Gravitation and Cosmology
dc.subjectSignalen_US
dc.subjectPhotonsen_US
dc.subjectProton-proton interactionsen_US
dc.subjectStandard model (Nuclear physics)en_US
dc.subjectCalorimetersen_US
dc.titleSearch for Nonpointing and Delayed Photons in the Diphoton and Missing Transverse Momentum Final State in 8 TeV pp Collisions at the LHC using the ATLAS Detectoren_US
dc.typeTexten_US
dc.type.genreArticleen_US

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