Observation of exotic $J/\psi \varphi$ resonant structure in diffractive processes in proton-proton collisions

Abstract

The first study of $J/\psi \varphi$ 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 $J/\psi \varphi$ production but are consistent with a resonant model including several resonant states observed previously only in $B^{+}\to J/\psi \varphi K^{+}$ decays. The ${\chi }_{c0}(4500)$ state is observed with a significance over $6\sigma$ and the ${\chi }_{c1}(4274)$ is confirmed with a significance of more than $4\sigma$.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/1799 (LHCb public pages)

References in corpus (23)

• LHCb Detector Performance
• The $XYZ$ states: experimental and theoretical status and perspectives
• Trial factors for the look elsewhere effect in high energy physics
• Measurement of the track reconstruction efficiency at LHCb
• Observation of $J/\psi \varphi$ structures consistent with exotic states from amplitude analysis of $B^{+}\to J/\psi \varphi K^{+}$ decays
• Precision luminosity measurements at LHCb
• Observation of new resonances decaying to $J/\psi K^{+}$ and $J/\psi \varphi$
• Amplitude analysis of $B^{+}\to J/\psi \varphi K^{+}$ decays
• Exclusive LHC physics with heavy ions: SuperChic 3
• Central exclusive production of $J/\psi$ and $\psi (2S)$ mesons in $pp$ collisions at $\sqrt{s}=13$TeV
• Measurement of $b$-hadron branching fractions for two-body decays into charmless charged hadrons
• Exclusive physics at the LHC with SuperChic 2
• A Mechanism for Hadron Molecule Production in p pbar(p) Collisions
• The QCD Dynamics of Tetraquark Production
• The HeRSCheL detector: high-rapidity shower counters for LHCb
• Hunting for tetraquarks in ultra-pheripheral heavy ion collisions
• Exclusive diffractive production of ${\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ via the intermediate $\sigma \sigma$ and $\rho \rho$ states in proton-proton collisions within tensor pomeron approach
• Production of exotic charmonium in $\gamma \gamma$ interactions at hadronic colliders
• Double vector meson production in photon - hadron interactions at hadronic colliders
• Exclusive production of double $J/\psi$ mesons in hadronic collisions
• On methods for correcting for the look-elsewhere effect in searches for new physics
• Probing the $X(4350)$ in $\gamma \gamma$ interactions at the LHC
• Photoproduction of the double $J/\psi$ (${\rm Y}$) at the LHC with forward proton tagging

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• Measurement of exclusive $J/\psi$ and $\psi (2S)$ production at $\sqrt{s}=13$ TeV
• Spectroscopy and Decay Properties of Excited Charmonium States