Coherent J/Ψ and ψ' photoproduction at midrapidity in ultra-peripheral Pb-Pb collisions at √sNN=5.02 TeV
The coherent photoproduction of J/Ψ and ψ' mesons was measured in ultra-peripheral Pb-Pb collisions at a center-of-mass energy √sNN = 5.02 TeV with the ALICE detector. Charmonia are detected in the central rapidity region for events where the hadronic interactions are strongly suppressed. The...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
9 August 2021
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| In: |
The European physical journal. C, Particles and fields
Year: 2021, Volume: 81, Issue: 8, Pages: 1-21 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-021-09437-6 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-021-09437-6 Verlag, lizenzpflichtig, Volltext: https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-021-09437-6 
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| Author Notes: | ALICE Collaboration* |
MARC
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| 245 | 1 | 0 | |a Coherent J/Ψ and ψ' photoproduction at midrapidity in ultra-peripheral Pb-Pb collisions at √sNN=5.02 TeV |c ALICE Collaboration* |
| 246 | 3 | 3 | |a Coherent J / psi and psi ' photoproduction at midrapidity in ultra-peripheral Pb-Pb collisions at square root s NN = 5.02 TeV |
| 264 | 1 | |c 9 August 2021 | |
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| 500 | |a ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, A. Berdnikova, L. Bergmann, M.C. Danisch, V.J.G. Feuillard, P. Glässel, J. Kim, M. Kim, M. Kroesen, J.A. Lopez, N.A. Martin, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, M.O. Schmidt, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, B. Windelband, A. Yuncu [und viele weitere] | ||
| 500 | |a Gesehen am 29.11.2021 | ||
| 500 | |a Im Titel ist "NN" nach s tiefgestellt, der ganze Ausdruck "s NN" steht unter dem Wurzelsymbol | ||
| 520 | |a The coherent photoproduction of J/Ψ and ψ' mesons was measured in ultra-peripheral Pb-Pb collisions at a center-of-mass energy √sNN = 5.02 TeV with the ALICE detector. Charmonia are detected in the central rapidity region for events where the hadronic interactions are strongly suppressed. The J/Ψ is reconstructed using the dilepton (l+l-) and proton-antiproton decay channels, while for the ψ' the dilepton and the l+l- π+π- decay channels are studied. The analysis is based on an event sample corresponding to an integrated luminosity of about 233 μb-1. The results are compared with theoretical models for coherent of J/Ψ and ψ' photoproduction. The coherent cross section is found to be in a good agreement with models incorporating moderate nuclear gluon shadowing of about 0.64 at a Bjorken-x of around 6x10−4, such as the EPS09 parametrization, however none of the models is able to fully describe the rapidity dependence of the coherent J/Ψ cross section including ALICE measurements at forward rapidity. The ratio of ψ' to J/Ψ coherent photoproduction cross sections was also measured and found to be consistent with the one for photoproduction off protons. | ||
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