Name: Observation of exotic $J/\psi\phi$ resonances in diffractive processes in proton-proton collisions
Creator: LHCb Collaboration
Published: 2024

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^{+} \to J / ψ ϕ K^{+}

decays. The

χ_{c 0} (4500)

state is observed with a significance over

5 σ

and the

χ_{c 1} (4274)

is confirmed with a significance of more than

4 σ

Table 1

10.17182/hepdata.153613.v1/t1

Total $J / ψ (\to μ^{+} μ^{-}) ϕ (\to K^{+} K^{-})$ diffractive production cross-section, multiplied by $B (J / ψ \to μ^{+} μ^{-})$ and $B (ϕ \to K^{+} K^{-})$ ...
Table 2

10.17182/hepdata.153613.v1/t2

$χ_{c 1} (4140) \to J / ψ (\to μ^{+} μ^{-}) ϕ (\to K^{+} K^{-})$ diffractive production cross-section, multiplied by $B (J / ψ \to μ^{+} μ^{-})$ and $\mathcal{B}(\phi \to K^+...
Table 3

10.17182/hepdata.153613.v1/t3

$χ_{c 1} (4274) \to J / ψ (\to μ^{+} μ^{-}) ϕ (\to K^{+} K^{-})$ diffractive production cross-section, multiplied by $B (J / ψ \to μ^{+} μ^{-})$ and $\mathcal{B}(\phi \to K^+...
Table 4

10.17182/hepdata.153613.v1/t4

$χ_{c 0} (4500) \to J / ψ (\to μ^{+} μ^{-}) ϕ (\to K^{+} K^{-})$ diffractive production cross-section, multiplied by $B (J / ψ \to μ^{+} μ^{-})$ and $\mathcal{B}(\phi \to K^+...
Table 5

10.17182/hepdata.153613.v1/t5

$χ_{c 1} (4685) or χ_{c 0} (4700) \to J / ψ (\to μ^{+} μ^{-}) ϕ (\to K^{+} K^{-})$ diffractive production cross-section, multiplied by $B (J / ψ \to μ^{+} μ^{-})$ ...
Table 6

10.17182/hepdata.153613.v1/t6

Nonresonant $J / ψ (\to μ^{+} μ^{-}) ϕ (\to K^{+} K^{-})$ diffractive production cross-section, multiplied by $B (J / ψ \to μ^{+} μ^{-})$ and $B (ϕ \to K^{+} K^{-})$ ...

Table 1

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