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$J/\psi$ Photoproduction Results from ALICE

Diffractive photoproduction of J/ψ vector mesons is studied at the LHC with the ALICE detector in p–Pb and Pb–Pb ultra-peripheral collisions (UPCs), where the Pb ions act as powerful sources of quasi-real photons. In this contribution, the first measurement at the LHC of dissociative photoproduction...

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Autor principal: Herman, T
Lenguaje:eng
Publicado: 2023
Materias:
Acceso en línea:https://dx.doi.org/10.5506/APhysPolBSupp.16.1-A98
http://cds.cern.ch/record/2869536
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author Herman, T
author_facet Herman, T
author_sort Herman, T
collection CERN
description Diffractive photoproduction of J/ψ vector mesons is studied at the LHC with the ALICE detector in p–Pb and Pb–Pb ultra-peripheral collisions (UPCs), where the Pb ions act as powerful sources of quasi-real photons. In this contribution, the first measurement at the LHC of dissociative photoproduction of J/ψ off protons is presented; this process is sensitive to quantum fluctuations of the structure of the target at the subnucleon level. In addition, cross sections for the exclusive channel and for continuum dimuon production at small masses were obtained in the same kinematic region. This latter process probes our simultaneous understanding, in a new kinematic region, of the photon flux emitted by protons and by lead ions. The transverse momentum dependence of J/ψ photoproduction on lead targets in Pb–Pb collisions at midrapidity, which is sensitive to the gluonic structure of Pb in the impact-parameter plane, is also presented. The measurement of J/ψ photoproduction off hadrons sheds light onto the initial state of QCD targets and provides important constraints on the initial conditions used in hydrodynamical models of heavy-ion collisions.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2023
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spelling cern-28695362023-10-04T17:33:17Zdoi:10.5506/APhysPolBSupp.16.1-A98http://cds.cern.ch/record/2869536engHerman, T$J/\psi$ Photoproduction Results from ALICENuclear Physics - ExperimentParticle Physics - ExperimentDiffractive photoproduction of J/ψ vector mesons is studied at the LHC with the ALICE detector in p–Pb and Pb–Pb ultra-peripheral collisions (UPCs), where the Pb ions act as powerful sources of quasi-real photons. In this contribution, the first measurement at the LHC of dissociative photoproduction of J/ψ off protons is presented; this process is sensitive to quantum fluctuations of the structure of the target at the subnucleon level. In addition, cross sections for the exclusive channel and for continuum dimuon production at small masses were obtained in the same kinematic region. This latter process probes our simultaneous understanding, in a new kinematic region, of the photon flux emitted by protons and by lead ions. The transverse momentum dependence of J/ψ photoproduction on lead targets in Pb–Pb collisions at midrapidity, which is sensitive to the gluonic structure of Pb in the impact-parameter plane, is also presented. The measurement of J/ψ photoproduction off hadrons sheds light onto the initial state of QCD targets and provides important constraints on the initial conditions used in hydrodynamical models of heavy-ion collisions.oai:cds.cern.ch:28695362023
spellingShingle Nuclear Physics - Experiment
Particle Physics - Experiment
Herman, T
$J/\psi$ Photoproduction Results from ALICE
title $J/\psi$ Photoproduction Results from ALICE
title_full $J/\psi$ Photoproduction Results from ALICE
title_fullStr $J/\psi$ Photoproduction Results from ALICE
title_full_unstemmed $J/\psi$ Photoproduction Results from ALICE
title_short $J/\psi$ Photoproduction Results from ALICE
title_sort $j/\psi$ photoproduction results from alice
topic Nuclear Physics - Experiment
Particle Physics - Experiment
url https://dx.doi.org/10.5506/APhysPolBSupp.16.1-A98
http://cds.cern.ch/record/2869536
work_keys_str_mv AT hermant jpsiphotoproductionresultsfromalice