Observation of Light-by-Light Scattering in Ultraperipheral Pb plus Pb Collisions with the ATLAS Detector

dc.WoS.categoriesPhysics, Multidisciplinaryen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-12-21T07:49:56Z
dc.date.available2020-12-21T07:49:56Z
dc.date.issued2019-07-31
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractThis Letter describes the observation of the light-by-light scattering process, gamma gamma -> gamma gamma, in Pb + Pb collisions at root S-NN = 5.02 TeV. The analysis is conducted using a data sample corresponding to an integrated luminosity of 1.73 nb(-1), collected in November 2018 by the ATLAS experiment at the LHC. Light-by-light scattering candidates are selected in events with two photons produced exclusively, each with transverse energy E-T(gamma) > 3 GeV and pseudorapidity vertical bar eta(gamma)vertical bar < 2.4, diphoton invariant mass above 6 GeV, and small diphoton transverse momentum and acoplanarity. After applying all selection criteria, 59 candidate events are observed for a background expectation of 12 +/- 3 events. The observed excess of events over the expected background has a significance of 8.2 standard deviations. The measured fiducial cross section is 78 +/- 13(stat) +/- 7(syst) +/- 3(lumi) nb.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1103/PhysRevLett.123.052001en_US
dc.identifier.issn1079-7114
dc.identifier.issn0031-9007
dc.identifier.pmid31491300en_US
dc.identifier.scopus2-s2.0-85071896312en_US
dc.identifier.urihttps://hdl.handle.net/11411/2925
dc.identifier.urihttps://doi.org/10.1103/PhysRevLett.123.052001
dc.identifier.wosWOS:000479003100006en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.issue5en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors200+en_US
dc.publisherAMER PHYSICAL SOCen_US
dc.relation.ispartofPHYSICAL REVIEW LETTERSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectULTRARELATIVISTIC HEAVY-IONen_US
dc.subjectDELBRUCK SCATTERINGen_US
dc.subjectPHYSICSen_US
dc.titleObservation of Light-by-Light Scattering in Ultraperipheral Pb plus Pb Collisions with the ATLAS Detectoren_US
dc.typeArticleen_US
dc.volume123en_US

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