The first study of J/ψ ϕ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb^−1. The data disfavour a nonresonant J/ψ ϕ production but are consistent with a resonant model including several resonant states observed previously only in B+ → J/ψ ϕ K+ decays. The χc0(4500) state is observed with a significance over 5σ and the χc1(4274) is confirmed with a significance of more than 4σ.

Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2025). Observation of Exotic J/ψ ϕ Resonant Structure in Diffractive Processes in Proton-Proton Collisions. PHYSICAL REVIEW LETTERS, 134(3), 1-12 [10.1103/physrevlett.134.031902].

Observation of Exotic J/ψ ϕ Resonant Structure in Diffractive Processes in Proton-Proton Collisions

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
2025

Abstract

The first study of J/ψ ϕ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb^−1. The data disfavour a nonresonant J/ψ ϕ production but are consistent with a resonant model including several resonant states observed previously only in B+ → J/ψ ϕ K+ decays. The χc0(4500) state is observed with a significance over 5σ and the χc1(4274) is confirmed with a significance of more than 4σ.
2025
Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2025). Observation of Exotic J/ψ ϕ Resonant Structure in Diffractive Processes in Proton-Proton Collisions. PHYSICAL REVIEW LETTERS, 134(3), 1-12 [10.1103/physrevlett.134.031902].
Aaij, R.; Abdelmotteleb, A.  S.  W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A.  A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapop...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1006870
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