The ALICE Collaboration reports three measurements in ultraperipheral proton-lead collisions at forward rapidity. The exclusive two-photon process γγ → μþμ− and the exclusive photoproduction of J=ψ are studied. J=ψ photoproduction with proton dissociation is measured for the first time at a hadron collider. The cross section for the two-photon process of dimuons in the invariant mass range from 1 to 2.5 GeV=c2 agrees with leading-order quantum electrodynamics calculations. The exclusive and dissociative cross sections for J=ψ photoproductions are measured for photon-proton center-of-mass energies from 27 to 57 GeV. They are in good agreement with HERA results.
Exclusive and dissociative J/ψ photoproduction, and exclusive dimuon production, in p-Pb collisions at √sNN=8.16 TeV
Barile, F.Membro del Collaboration Group
;Colella, D.Membro del Collaboration Group
;Mazzilli, M.Membro del Collaboration Group
;Volpe, G.Membro del Collaboration Group
;
2023-01-01
Abstract
The ALICE Collaboration reports three measurements in ultraperipheral proton-lead collisions at forward rapidity. The exclusive two-photon process γγ → μþμ− and the exclusive photoproduction of J=ψ are studied. J=ψ photoproduction with proton dissociation is measured for the first time at a hadron collider. The cross section for the two-photon process of dimuons in the invariant mass range from 1 to 2.5 GeV=c2 agrees with leading-order quantum electrodynamics calculations. The exclusive and dissociative cross sections for J=ψ photoproductions are measured for photon-proton center-of-mass energies from 27 to 57 GeV. They are in good agreement with HERA results.| File | Dimensione | Formato | |
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PhysRevD.108.112004.pdf
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