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Observation of WWW Production in Pp Collisions at S

[Study Group] ATLAS Collaboration CERNSpyridon ArgyropoulosFabian BechererMichael BöhlerJose Antonio Fernandez PretelSimona GargiuloConstantin HeideggerKim K. HeideggerBeate HeinemannGregor HertenDavid HohnJan Cedric HönigKarl JakobsPeter JenniEfstathios KarentzosAndrea KnueKarsten KönekeOleg KuprashUlrich LandgrafValerie LangAlena LösleVeronika MagerlTetiana MoskaletsÖmer Ogul ÖncelUlrich ParzefallVladislavs PlesanovsDimbiniaina RafanoharanaArturo Rodriguez RodriguezBenoit RolandBenjamin RottlerFrederik RührZuzana RúrikováDirk SammelFrank SauerburgerKatharina E. SchleicherPatrick ScholerMarkus SchumacherShalu SolomonKsenia SolovievaDennis SperlichChristian WeiserLiv Wiik-FuchsBenedict T. WinterChristopher YoungDaniele ZanziStephanie Zimmermannet al

出版	Universität, 2022
URL	http://books.google.com.hk/books?id=s1LgzwEACAAJ&hl=&source=gbs_api

註釋

Abstract: This Letter reports the observation of WWW production and a measurement of its cross section using 139 fb−1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Events with two same-sign leptons (electrons or muons) and at least two jets, as well as events with three charged leptons, are selected. A multivariate technique is then used to discriminate between signal and background events. Events from WWW production are observed with a significance of 8.0 standard deviations, where the expectation is 5.4 standard deviations. The inclusive WWW production cross section is measured to be 820±100 (stat)±80 (syst) fb, approximately 2.6 standard deviations from the predicted cross section of 511±18 fb calculated at next-to-leading-order QCD and leading-order electroweak accuracy