Volume 129, Number 4, February 2020
|Number of page(s)||5|
|Published online||30 March 2020|
Coherent J/ψ photoproduction in peripheral heavy-ion collisions
SUBATECH, IMT Atlantique, Université de Nantes, CNRS-IN2P3 - Nantes, France
Received: 23 October 2019
Accepted: 4 March 2020
In 2015, the ALICE Collaboration reported the first measurement of an excess in the yield of at very low transverse momentum () in the forward rapidity region (2.5 < y < 4) in peripheral lead-lead (Pb-Pb) collisions at at the CERN LHC. The coherent photoproduction was proposed as the potential underlying physics mechanism. This is known to be the main production mechanism for low- production in ultra-peripheral collisions, which are dominated by electromagnetic interactions. However, the observation of a large effect in more central collisions that are dominated by the hadronic interactions was quite surprising. This article represents a proceeding contribution on the preliminary results from Pb-Pb collisions at shown in a poster during the National Congress of the French Physics Society in July 2019.
PACS: 25.20.Lj – Photoproduction reactions / 14.40.Pq – Heavy quarkonia / 24.85.+p – Quarks, gluons, and QCD in nuclear reactions
© CERN for the benefit of the ALICE Collaboration
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