The first study of J/ψφ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb-1. The data disfavor a nonresonant J/ψφ production but are consistent with a resonant model including several resonant states observed previously only in B+→J/ψφK+ decays. The χc0(4500) state is observed with a significance over 6σ and the χc1(4274) is confirmed with a significance of more than 4σ. [The LHCb Collaboration]
Observation of Exotic J/ψϕ Resonant Structure in Diffractive Processes in Proton-Proton Collisions / R. Aaij, A. . .A.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 134:3(2025), pp. 031902.1-031902.12. [10.1103/physrevlett.134.031902]
Observation of Exotic J/ψϕ Resonant Structure in Diffractive Processes in Proton-Proton Collisions
S. Cesare;C. Mancuso;D. Marangotto;A. Merli;N. Neri;E. Spadaro Norella;G. Tonani;Z. Wang;
2025
Abstract
The first study of J/ψφ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb-1. The data disfavor a nonresonant J/ψφ production but are consistent with a resonant model including several resonant states observed previously only in B+→J/ψφK+ decays. The χc0(4500) state is observed with a significance over 6σ and the χc1(4274) is confirmed with a significance of more than 4σ. [The LHCb Collaboration]| File | Dimensione | Formato | |
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