Observation of triple J/psi meson production in proton-proton collisions

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dc.WoS.categoriesPhysics, Multidisciplinaryen_US
dc.authorid0000-0002-9007-8260en_US
dc.contributor.authorYetkin, Elif Aslı
dc.date.accessioned2023-10-05T06:23:39Z
dc.date.available2023-10-05T06:23:39Z
dc.date.issued2023-01
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractProtons consist of three valence quarks, two up-quarks and one down-quark, held together by gluons and a sea of quark-antiquark pairs. Collectively, quarks and gluons are referred to as partons. In a proton-proton collision, typically only one parton of each proton undergoes a hard scattering - referred to as single-parton scattering - leaving the remainder of each proton only slightly disturbed. Here, we report the study of double- and triple-parton scatterings through the simultaneous production of three J/psi mesons, which consist of a charm quark-antiquark pair, in proton-proton collisions recorded with the CMS experiment at the Large Hadron Collider. We observed this process - reconstructed through the decays of J/psi mesons into pairs of oppositely charged muons - with a statistical significance above five standard deviations. We measured the inclusive fiducial cross-section to be 272(-104)(+141) (stat) +/- 17 (syst) fb, and compared it to theoretical expectations for triple-J/psi meson production in single-, double- and triple-parton scattering scenarios. Assuming factorization of multiple hard-scattering probabilities in terms of single-parton scattering cross-sections, double- and triple-parton scattering are the dominant contributions for the measured process.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1038/s41567-022-01838-yen_US
dc.identifier.issn1745-2481
dc.identifier.issn1745-2473
dc.identifier.scopus2-s2.0-85162051065en_US
dc.identifier.urihttps://hdl.handle.net/11411/5228
dc.identifier.urihttps://doi.org/10.1038/s41567-022-01838-y
dc.identifier.wosWOS:000927936700008en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors200+en_US
dc.publisherNATURE PORTFOLIOen_US
dc.relation.ispartofNATURE PHYSICSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectDOUBLE PARTON INTERACTIONSen_US
dc.subjectP(P)OVER-BAR COLLISIONSen_US
dc.subjectMATRIX-ELEMENTen_US
dc.subjectJET EVENTSen_US
dc.subjectHELAC-ONIAen_US
dc.subjectSCATTERINGSen_US
dc.subjectGENERATORen_US
dc.subjectPPen_US
dc.titleObservation of triple J/psi meson production in proton-proton collisionsen_US
dc.typeArticleen_US

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