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Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/123546
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dc.contributor.authorAad, G.en
dc.contributor.authorAbbott, B.en
dc.contributor.authorAbbott, D.en
dc.contributor.authorAbdinov, O.en
dc.contributor.authorAbud, A.A.en
dc.contributor.authorAbeling, K.en
dc.contributor.authorAbhayasinghe, D.en
dc.contributor.authorAbidi, S.en
dc.contributor.authorAbouZeid, O.en
dc.contributor.authorAbraham, N.en
dc.contributor.authorAbramowicz, H.en
dc.contributor.authorAbreu, H.en
dc.contributor.authorAbulaiti, Y.en
dc.contributor.authorAcharya, B.en
dc.contributor.authorAchkar, B.en
dc.contributor.authorAdachi, S.en
dc.contributor.authorAdam, L.en
dc.contributor.authorBourdarios, C.A.en
dc.contributor.authorAdamczyk, L.en
dc.contributor.authorAdamek, L.en
dc.contributor.authoret al.en
dc.date.issued2019en
dc.identifier.citationPHYSICAL REVIEW LETTERS, 2019; 123(5)en
dc.identifier.issn0031-9007en
dc.identifier.issn1079-7114en
dc.identifier.urihttp://hdl.handle.net/2440/123546-
dc.description.abstractThis Letter describes the observation of the light-by-light scattering process, γγ→γγ, in Pb+Pb collisions at sqrt[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}^{γ}>3  GeV and pseudorapidity |η_{γ}|<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
dc.language.isoEnglishen
dc.publisherAMER PHYSICAL SOCen
dc.subjectATLAS Collaborationen
dc.titleObservation of Light-by-Light Scattering in Ultraperipheral Pb plus Pb Collisions with the ATLAS Detectoren
dc.typeJournal articleen
dc.identifier.doi10.1103/PhysRevLett.123.052001en
pubs.publication-statusPublisheden
dc.identifier.orcidJackson, P. [0000-0002-0847-402X]en
Appears in Collections:Physics publications

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