Search for light long-lived neutral particles produced in pp collisions at root s=13 TeV and decaying into collimated leptons or light hadrons with the ATLAS detector

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dc.WoS.categoriesPhysics, Particles & Fieldsen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-12-08T07:50:21Z
dc.date.available2020-12-08T07:50:21Z
dc.date.issued2020-05-20
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description29 pagesen_US
dc.description.abstractSeveral models of physics beyond the Standard Model predict the existence of dark photons, light neutral particles decaying into collimated leptons or light hadrons. This paper presents a search for long-lived dark photons produced from the decay of a Higgs boson or a heavy scalar boson and decaying into displaced collimated Standard Model fermions. The search uses data corresponding to an integrated luminosity of 36.1 fb-1 collected in proton-proton collisions at <mml:msqrt>s</mml:msqrt>=13 Te recorded in 2015-2016 with the ATLAS detector at the Large Hadron Collider. The observed number of events is consistent with the expected background, and limits on the production cross section times branching fraction as a function of the proper decay length of the dark photon are reported. A cross section times branching fraction above 4 pb is excluded for a Higgs boson decaying into two dark photons for dark-photon decay lengths between 1.5 mm and 307 mm.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1140/epjc/s10052-020-7997-4
dc.identifier.issn1434-6052
dc.identifier.issn1434-6044
dc.identifier.scopus2-s2.0-85085041736en_US
dc.identifier.urihttps://hdl.handle.net/11411/2788
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-020-7997-4
dc.identifier.wosWOS:000546996400002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.issue5en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors1000+en_US
dc.publisherSpringeren_US
dc.relation.ispartofEuropean Physical Journal Cen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectProton-Proton Collisionsen_US
dc.subjectHiggs-Boson Productionen_US
dc.subjectVector Gauge Bosonen_US
dc.subjectPHI-Meson Decaysen_US
dc.subjectParton Distributionsen_US
dc.subjectExclusion Limitsen_US
dc.subjectDark Photonen_US
dc.subjectJetsen_US
dc.subjectForcesen_US
dc.subjectPairen_US
dc.titleSearch for light long-lived neutral particles produced in pp collisions at root s=13 TeV and decaying into collimated leptons or light hadrons with the ATLAS detector
dc.typeArticle
dc.volume80en_US

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