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

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 consis...

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Bibliographic Details
Authors: Aaij, R., Vazquez Gomez, R., Mauricio, J., Marin Benito, Carla, Manera Escalero, Rafel, López Huertas, Albert, Lobo Salvia, Aniol, Graugés Pous, Eugeni, Gomez Fernandez, S., Gioventù, Alessandra, Gironella Gironell, Pere, Garrido Beltran, Lluís, Garcia Moreno, Paula, Comerma-Montells, Albert, Calefice, Lukas, LHCb Collaboration
Format: article
Status:Published version
Publication Date:2025
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/220922
Online Access:https://hdl.handle.net/2445/220922
Access Level:Open access
Keyword:Cromodinàmica quàntica
Col·lisions (Física)
Mesons (Física nuclear)
Quantum chromodynamics
Collisions (Physics)
Mesons (Nuclear physics)
Description
Summary: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 Bþ → J=ψϕKþ decays. The χc0ð4500Þ state is observed with a significance over 6σ and the χc1ð4274Þ is confirmed with a significance of more than 4σ

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