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New Structures in the J / ψ J / ψ Mass Spectrum in Proton-Proton Collisions at √s = 13 TeV

CMS Collaboration; Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Escalante Del Valle, A.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Liko, D.; Mikulec, I.; Schieck, J.; Schöfbeck, R.; Schwarz, D.; Sonawane, M.; ... mehr

Abstract:

A search is reported for near-threshold structures in the J/ψJ/ψ invariant mass spectrum produced in proton-proton collisions at s√=13TeV from data collected by the CMS experiment, corresponding to an integrated luminosity of 135fb−1. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of 6638+43−38(stat)+16−31(syst)MeV. Another structure with even higher significance is found at a mass of 6847+44−28(stat)+48−20(syst)MeV, which is consistent with the X(6900) resonance reported by the LHCb experiment and confirmed by the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of 7134+48−25(stat)+41−15(syst)MeV. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150 MeV relative to the model with interference.


Verlagsausgabe §
DOI: 10.5445/IR/1000170031
Veröffentlicht am 16.04.2024
Originalveröffentlichung
DOI: 10.1103/PhysRevLett.132.111901
Scopus
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 03.2024
Sprache Englisch
Identifikator ISSN: 0031-9007, 1079-7114
KITopen-ID: 1000170031
Erschienen in Physical Review Letters
Verlag American Physical Society (APS)
Band 132
Heft 11
Seiten Art.-Nr.: 111901
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 15.03.2024
Nachgewiesen in arXiv
Scopus
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