Title: | Probing small Bjorken-x nuclear gluonic structure via coherent J/ψ photoproduction in ultraperipheral PbPb collisions at √<i>s</i><sub>NN</sub> = 5.02 TeV |
Other Titles: | Probing small Bjorken-$x$ nuclear gluonic structure via coherent J/$ψ$ photoproduction in ultraperipheral PbPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV |
Authors: | Tumasyan, A Adam, W Andrejkovic, JW Bergauer, T Chatterjee, S Damanakis, K Dragicevic, M Escalante Del Valle, A Hussain, PS Jeitler, M Krammer, N Sen, S Chinellato, J Ellis, KV Lawhorn, JM Harder, K Meijers, F Harper, S Pradhan, R Antonello, M Dodonova, A Dorigo, T Dutta, S Kar, C Band, R Kole, G Campana, M Ivanov, Y Holmberg, M-L Nunez Ornelas, M Luo, S Zuolo, D Jain, S Urda Gómez, L Linacre, J Kasieczka, G Manolopoulos, K Lee, Y Falmagne, G Cavallari, F Newbold, DM Uslan, E Setti, F Ille, B Wassmer, M Mao, J Olaiya, E Tonjes, MB Ravera, F Liao, H Eich, N Buontempo, S Cunqueiro Mendez, L Malhotra, S Petyt, D Presilla, M Kachanov, V Pérez-Calero Yzquierdo, A Chen, Z Varelas, N Benecke, A Reis, T Susa, T Salvi, G Schuh, T Del Re, D Bayatmakou, M Reinsvold Hall, A Mersi, S Shepherd-Themistocleous, CH Ecklund, KM Lanev, A Tomalin, IR Cagnotta, A Sarkar, S Diotalevi, T Newman, HB Dickinson, J Nam, K Scham, M Williams, T Sahin, MÖ Van Doninck, W Wang, X Merlin, JA Kim, D Petkov, P Bainbridge, R Dos Santos Sousa, V Bloch, P Li, YY Pujahari, PR Bylsma, B Bein, S Meschi, E Ye, Z Ristic, B Borg, J Liu, Z-A Wieland, S Kaminskiy, A Cutts, D Bucci, R Brown, CE Ristori, L Brzhechko, D Wichmann, K Heredia-De La Cruz, I Buchmuller, O Nguyen, TQ Lo Meo, S Hiltbrand, J Eliseev, D Cacchio, V Baden, A Kardapoltsev, L Carrillo Montoya, CA Carnevali, F Kumar, S Schmidt, A Cepaitis, V Haller, J Bouchamaoui, H Citron, M Chahal, GS Lu, R-S Mueller, R Sexton-Kennedy, E Silva Do Amaral, SM Krücker, D Aarup Petersen, H Palencia Cortezon, E Blancon, B Beni, N Di Marco, E Saha, NR Colling, D Dancu, JS Dauncey, P Cremonesi, M Novak, A Mcgrady, C Erdmann, M Ambrozas, M Valuev, V Dube, S Strobbe, N Zucchetta, A Di Croce, D Davies, G Smith, N Li, Q Moortgat, F Cristella, L Milosevic, V Wolf, R Davies, J Paganis, E Leutgeb, E Della Negra, M Fayer, S Pena, C Karjavine, V Fedi, G Piedra Gomez, J Rodríguez Bouza, V Yang, UK Hall, G Osherson, M Padula, SS Demiragli, Z Park, IC Fackeldey, P Psallidas, A Diemoz, M Hassanshahi, MH Pervan, N Aydilek, O Nguyen, V Mulders, M Spiropulu, M Howard, A Bloch, D Das, A Cavallo, N Nayak, A Iles, G Beauceron, S Wunsch, S Soha, A Tavernier, S Karneyeu, A Langford, J Lyons, L Yoo, J Schöfbeck, R Monti, F Sharma, A Overton, D Popova, E Kukral, O Vischia, P Orfanelli, S de Barbaro, P Magnan, A-M Virdi, AK Simkina, P Menasce, D Nowack, A Rossi, B Baron, O Nowotny, F Malik, S Vlimant, JR Kveton, A Martelli, A Roh, Y Mieskolainen, M Molnar, J Goldouzian, R Khein, L Quinnan, M Benato, L Thomas-Wilsker, J Nash, J Rathjens, D Pesaresi, M Liyanage, K Radburn-Smith, BC Sanz Becerra, DA Petrucciani, G De Iorio, A Vetens, W Zuo, X Orsini, L Ujvari, B Mukherjee, S Richards, A Sikdar, AK Bevilacqua, T Bonanomi, M Tropea, P Rose, A Stamerra, A Klima, B Jessop, C Townsend, A Seez, C Xiao, R Varghese, S Fernandez, M Safonov, A Bhatnagar, V Sharma, R Mokhtar, F Perera, N Treille, D Laurila, S Shukla, R Connor, P Tapper, A Saumya, S Song, D Verwilligen, P 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Keywords: | photon production;relativistic heavy-ion collisions;gluons;hadron colliders;particles and fields;nuclear physics |
Issue Date: | 28-Dec-2023 |
Publisher: | American Physical Society (APS) |
Citation: | Tumasyan, A. et al for the benefit of the CMS Collaboration (2023) 'Probing small Bjorken-x nuclear gluonic structure via coherent J/ψ photoproduction in ultraperipheral PbPb collisions at √sNN = 5.02 TeV', Physical Review Letters, 131 (26). 262301, pp. 1 - 22. doi: 10.1103/physrevlett.131.262301. |
Abstract: | Quasireal photons exchanged in relativistic heavy ion interactions are powerful probes of the gluonic structure of nuclei. The coherent J/ψ photoproduction cross section in ultraperipheral lead-lead collisions is measured as a function of photon-nucleus center-of-mass energies per nucleon (W<sup>Pb</sup><sub>γN</sub>), over a wide range of 40 < W<sup>Pb</sup><sub>γN</sub> < 400 GeV. Results are obtained using data at the nucleon-nucleon center-of-mass energy of 5.02 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 1.52 nb^−1. The cross section is observed to rise rapidly at low WPbγN, and plateau above W<sup>Pb</sup><sub>γN</sub> ≈ 40 GeV, up to 400 GeV, a new regime of small Bjorken-x (≈ 6 × ^10−5) gluons being probed in a heavy nucleus. The observed energy dependence is not predicted by current quantum chromodynamic models. |
Description: | A pre-print version of this article is available at arXiv:2303.16984v2 [nucl-ex], https://arxiv.org/abs/2303.16984v2. Comments: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at this http URL (CMS Public Pages). Report number: CMS-HIN-22-002, CERN-EP-2023-031. |
URI: | https://bura.brunel.ac.uk/handle/2438/28853 |
DOI: | https://doi.org/10.1103/physrevlett.131.262301 |
ISSN: | 0031-9007 |
Other Identifiers: | ORCiD: A. Tumasyan https://orcid.org/0009-0000-0684-6742 ORCiD: Joanne E. Cole https://orcid.org/0000-0001-5638-7599 ORCiD: Akram Khan https://orcid.org/0000-0002-4597-4402 ORCiD: Paul Kyberd https://orcid.org/0000-0002-7353-7090 ORCiD: Ivan D. Reid https://orcid.org/0000-0002-9235-779X CMS-HIN-22-002 CERN-EP-2023-031 arXiv:2303.16984v2 [nucl-ex] 262301 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
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