Photoproduction of low-pT J/[psi] from peripheral to central Pb-Pb collisions at 5.02 TeV
An excess of J/ψ yield at very low transverse momentum (pT<0.3 GeV/c), originating from coherent photoproduction, is observed in peripheral and semicentral hadronic Pb-Pb collisions at a center-of-mass energy per nucleon pair of sNN=5.02 TeV. The measurement is performed with the ALICE detector v...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
10 November 2023
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| In: |
Physics letters
Year: 2023, Jahrgang: 846, Pages: 1-14 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2022.137467 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.physletb.2022.137467 Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269322006013 
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| Verfasserangaben: | ALICE collaboration* |
MARC
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| 245 | 1 | 0 | |a Photoproduction of low-pT J/[psi] from peripheral to central Pb-Pb collisions at 5.02 TeV |c ALICE collaboration* |
| 246 | 3 | 0 | |a ψ |
| 264 | 1 | |c 10 November 2023 | |
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| 500 | |a *ALICE collaboration: S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, M.C. Danisch, V.J.G. Feuillard, I. Fokin, P. Glässel, J. Kim, M. Kim, M. Kroesen, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, C.A. Van Veen, M. Völkl, B. Windelbrand, A. Yuncu, F. Zanone [und 1009 weitere Personen] | ||
| 500 | |a Gesehen am 04.07.2025 | ||
| 520 | |a An excess of J/ψ yield at very low transverse momentum (pT<0.3 GeV/c), originating from coherent photoproduction, is observed in peripheral and semicentral hadronic Pb-Pb collisions at a center-of-mass energy per nucleon pair of sNN=5.02 TeV. The measurement is performed with the ALICE detector via the dimuon decay channel at forward rapidity (2.5<y<4). The nuclear modification factor at very low pT and the coherent photoproduction cross section are measured as a function of centrality down to the 10% most central collisions. These results extend the previous study at sNN=2.76 TeV, confirming the clear excess over hadronic production in the pT range 0−0.3 GeV/c and the centrality range 70-90%, and establishing an excess with a significance greater than 5σ also in the 50-70% and 30-50% centrality ranges. The results are compared with earlier measurements at sNN=2.76 TeV and with different theoretical predictions aiming at describing how coherent photoproduction occurs in hadronic interactions with nuclear overlap. | ||
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