A search is reported for near-threshold structures in the Formula Presented invariant mass spectrum produced in proton-proton collisions at Formula Presented from data collected by the CMS experiment, corresponding to an integrated luminosity of Formula Presented. 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 Formula Presented. Another structure with even higher significance is found at a mass of Formula Presented, which is consistent with the Formula Presented 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 Formula Presented. 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. © 2024 CERN, for the CMS Collaboration.

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., et al. (2024). New Structures in the J/ψj/ψ Mass Spectrum in Proton-Proton Collisions at √ s=13 TeV. PHYSICAL REVIEW LETTERS, 132(11) [10.1103/PhysRevLett.132.111901].

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

Ciocci, M. A.;D'Amante, V.;Turini, N.;
2024-01-01

Abstract

A search is reported for near-threshold structures in the Formula Presented invariant mass spectrum produced in proton-proton collisions at Formula Presented from data collected by the CMS experiment, corresponding to an integrated luminosity of Formula Presented. 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 Formula Presented. Another structure with even higher significance is found at a mass of Formula Presented, which is consistent with the Formula Presented 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 Formula Presented. 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. © 2024 CERN, for the CMS Collaboration.
2024
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., et al. (2024). New Structures in the J/ψj/ψ Mass Spectrum in Proton-Proton Collisions at √ s=13 TeV. PHYSICAL REVIEW LETTERS, 132(11) [10.1103/PhysRevLett.132.111901].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1297914