%0 Journal Article
%T Study of exclusive photoproduction of charmonium in ultra-peripheral lead-lead collisions
%A LHCb Collaboration (Aaij, R. et al
%A Jaimes Elles, S. J.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Rebollo De Miguel, M.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%A Sanderswood, I.
%J Journal of High Energy Physics
%D 2023
%V 06
%N 6
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2023
%O WOS:001035231500001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5661), last updated on Wed, 10 Apr 2024 12:40:14 +0000
%X The cross-sections of exclusive (coherent) photoproduction J/psi and (2S) mesons in ultra-peripheral PbPb collisions at a nucleon-nucleon centre-of-mass energy of 5.02TeV are measured using a data sample corresponding to an integrated luminosity of 228 +/- 10 μb(-1), collected by the LHCb experiment in 2018. The differential cross-sections are measured separately as a function of transverse momentum and rapidity in the nucleus-nucleus centre-of-mass frame for J/psi and psi(2S) mesons. The integrated cross-sections are measured to be sigma(coh)(J/psi) = 5.965 +/- 0.059 +/- 0.232 +/- 0.262mb and sigma(coh)(psi(2S)) = 0.923 +/- 0.086 +/- 0.028 +/- 0.040mb, where the first listed uncertainty is statistical, the second systematic and the third due to the luminosity determination. The cross-section ratio is measured to be sigma(coh)(psi(2S)) /sigma(coh)(J/psi) = 0.155 +/- 0.014 +/- 0.003, where the first uncertainty is statistical and the second is systematic. These results are compatible with theoretical predictions.
%K Heavy Ion Experiments
%K Heavy-Ion Collision
%K Photon Production
%K Quarkonium
%R 10.1007/JHEP06(2023)146
%U https://arxiv.org/abs/2206.08221
%U https://doi.org/10.1007/JHEP06(2023)146
%P 146-25pp