Exclusive production of double $J/\psi$ mesons in hadronic collisions

Abstract

We present the first calculation of exclusive double $J/\psi$ production in hadronic collisions. We analyse in detail the form of the Born-level $gg\to J/\psi J/\psi$ amplitudes within the non-relativistic quarkonium approximation and discuss the implications of this for the central exclusive production channel, within the `Durham' perturbative model. In addition we show that this direct single parton scattering contribution is expected to be strongly dominant in the exclusive case. We present predictions for the LHC and show that the expected cross sections are in reasonable agreement with the LHCb Run-I measurement of exclusive double $J/\psi$ production, with the measured invariant mass distribution described well by the theory. Motivated by this encouraging result we present predictions for observables that may be measured in LHC Run-II, and estimate the size of the expected cross sections in the $\psi (2S)$ and ${\chi }_c$ cases.

24 pages, 7 figures. Some discussion clarified and additional figure added. Version accepted for publication in J. Phys. G

References in corpus (7)

• Parton distributions for the LHC
• Dynamical parton distributions of the nucleon and very small-x physics
• Central Exclusive Particle Production at High Energy Hadron Colliders
• Improved determination of color-singlet nonrelativistic QCD matrix elements for S-wave charmonium
• Standard candle central exclusive processes at the Tevatron and LHC
• Soft processes at the LHC, II: Soft-hard factorization breaking and gap survival
• On radiative QCD backgrounds to exclusive H -> b bbar production at the LHC and a photon collider

Cited by in corpus (9)

• gamma-UPC: Automated generation of exclusive photon-photon processes in ultraperipheral proton and nuclear collisions with varying form factors
• Double parton scattering in pair-production of $J/\psi$ mesons at the LHC revisited
• Next-to-leading order QCD corrections to paired $B_c$ production in $e^{+}{e}^{-}$ annihilation
• Double vector meson production in photon - hadron interactions at hadronic colliders
• Unintegrated double parton distributions
• Exclusive and diffractive quarkonium -- pair production at the LHC and FCC
• Associative production of ${\rm Y}$ and open charm at LHC
• Results and Future Plans on Central Exclusive Production with the LHCb Detector
• Planar radiation zeros in five-parton QCD amplitudes