Measurement of ψ(2S) to J/ψ cross-section ratio as function of multiplicity in pPb collisions at $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV

A bstract The production ratio of ψ (2 S ) to J/ψ charmonium states is presented as a function of multiplicity in proton-lead collisions at a centre-of-mass energy of $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>8.16</mml:mn> </mml:math> TeV, for both prompt and nonprompt sources. The total luminosity recorded by the LHCb experiment corresponds to 13.6 nb − 1 for p Pb collisions and 20.8 nb − 1 for Pb p collisions, where the first particle corresponds to the particle traveling towards the detector. Measurements are performed in the dimuon final state at forward (backward) centre-of-mass rapidity, with respect to the proton direction, 1 . 5 &lt; y * &lt; 4 . 0 (−5 . 0 &lt; y * &lt; −2 . 5) for p Pb (Pb p ) collisions. A multiplicity dependence of the prompt production ratio is observed in p Pb collisions, whereas no dependence is found in nonprompt production, nor in either prompt or nonprompt production in Pb p collisions. These results suggest that in the Pb-going direction additional suppression mechanisms beyond comover effects may be present, possibly related to the formation of quark-gluon plasma. This highlights a transition from small to large collision systems and provides important insight into the suppression of charmonia in proton-nucleus collisions.

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Journal
Journal of High Energy Physics
Published
2025-11-26
DOI
https://doi.org/10.1007/jhep11(2025)169
Primary Topic
High-Energy Particle Collisions Research
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article
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article

Measurement of ψ(2S) to J/ψ cross-section ratio as function of multiplicity in pPb collisions at $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV

L. De Paula, A. Seuthe, I. Corredoira, M. M. Duras et al.
Journal of High Energy Physics
High-Energy Particle Collisions Research
article

Measurement of ψ(2S) to J/ψ cross-section ratio as function of multiplicity in pPb collisions at $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV

L. De Paula, A. Seuthe, I. Corredoira, M. M. Duras, D. Martínez Santos, W. Liu, R. Fantechi, A. Lobo Salvia, M. Martinelli, S. Sheng, J. de Boer, H.-P. Dembinski, J. Yu, O. Leroy, S. Jakobsen, J. Heuel, B. Saitta, E. Spiridenkov, H. Tilquin, A. Kupść, Marie Bachmayer, W. Barter, Yuki Fujii, F. Ferrari, A. Padee, A. Bertolin, D. Karpenkov, K. Richardson, G. Punzi, H. V. Cliff, G. Sarpis, S. Borghi, F. Muheim, M. Guarise, J. Li, P. Ilten, N. Jurik, G. Tonani, Y. Wei, Ö. Özçelik, Vukan Jevtic, K. Yang, A. Beck, D. Marangotto, V. Matiunin, J. E. Blank, E. Jiang, D. Bacher, M. Stefaniak, A. Grecu, T. Li, C. Prouvé, T. Ketel, W. Baldini, E. Jans, J. Hammerich, P. Kravchenko, K. Fischer, H. Schindler, M. Fontana, M. Monk, A. Okhotnikov, B. Passalacqua, A. Ishteev, J. Novoa Fernandez, M. Pló Casasús, R. Matev, D. Saranin, A. Schopper, P. Garcia Moreno, V. Placinta, S. Ely, G. Mancinelli, F. Blanc, Rita Sadek, G. Lanfranchi, F. Pisani, D. S. Mitzel, L. Li, N. Polukhina, Ilya Segal, M. Charles, R. Williams, F. Ferreira Rodrigues, L. Kolk, R. Quagliani, S. Cali, S. Easo, H. Sazak, A. Rodriguez Alvarez, J. Baptista de Souza Leite, A. Konoplyannikov, L. Toscano, A. Mauri, S. Poslavskii, B. Couturier, Dorothea Vom Bruch, B. Dey, X. Vilasís-Cardona, K. Liu, S. J. Jaimes Elles, A.-K. Guseinov, D. Nicotra, P. Collins, A. Berezhnoy, Z. Chen, C. Zhang, W. Byczynski, Louis Henry, P. Baladrón Rodríguez, H. Pereira Da Costa, A. D. Dowling, V. Shevchenko, M. Zdybał, Zakariya Aliouche, R. Manera Escalero, J. J. Back, T. Miralles, Q. Li, D. Ilin, N. Valls Canudas, E. Kulikova, José Javier Saavedra-Arias, Miguel Ruiz Diaz, D. Miao, W. Krupa, F. Borgato, S. Barsuk, M. Schiller, Y. Zhao, L. Soares Lavra, U. Egede, S. Monteil, Q. Niu, J. T. Borsuk, Y. Li, P. Billoir, A. Obłąkowska-Mucha, Riccardo Nunzio Pilato, M. Merk, M. Pappagallo, M. Pizzichemi, A. Gioventù, N. Qin, I. R. Barbosa, L. Martinazzoli, Y. L. Liu, G. Meier, A. Biolchini, E. Rodriguez Fernandez, A. Rogovskiy, G. Benane, J. M. Otalora Goicochea, Z. Ghorbanimoghaddam, L. Congedo, Xutao Zheng, C. Betancourt, Ibrahim Chahrour, G. Martellotti, L. Garrido, A. Merli, T. Rong, M. Chefdeville, R. J. Hunter, E. Ben-Haim, W. Krzemień, A. Lampis, E. Golobardes, N. Kleijne, A. Usachov, T. Q. Gao, Tianyu Xing, J. Reich, S. Bachmann, J. W. Kautz, F. Polci, G. Gong, C. Y. Yu, E. Vilella Figueras, M. Becker, B. Sciascia, M. Poli Lener, O. Kot, J. D. Brandenburg, J. M. De Miranda, A. Leflat, I. Gorelov, S. Legotin, G. Manca, W. Morren, B. Fang, Lauren Grace Mackey, E. Rodrigues, R. McNulty, Justin Bartz, O. Boente García, P. Carniti, J. Dalseno, C. Fitzpatrick, N. Harnew, C. Landesa Gomez, F. M. Meng, S. Celani, X. Dai, R. Forty, D. Sundfeld, A. Zhelezov, H. Mu, P. Spradlin, T. Gershon, J. Wu, X. W. Wang, R. Song, G. Haefeli, F. L. Liu, A. Chubykin, P. Durante, M. Féo, Frédéric Hemmer, R. D. Moise, M. Kreps, N. Breer, A. Artamonov, D. L. Rolf, S. Malde, R. Ribatti, S. Cesare, X. Wu, V. Kudryavtsev, G. Corti, V. Yeroshenko, Mikhail Barnyakov, Arsenii Gavrikov, J. Bhom, E. Minucci, M. Richardson-Slipper, G. Khreich, C. Dong, Y. Liu, M. Ferrillo, Marion Lehuraux, E. Spadaro Norella, A. Bizzeti, P. Roloff, B. Mitreska, K. Świentek, X. Hu, T. Fiutowski, Gianluca Zunica, C. L. Da Silva, S. Belin, Z. Ren, R. Mountain, K. R. Mattioli, A. Brea Rodríguez, K. Belous, R. I. Rabadán Trejo, S. Perazzini, A. Boyer, T. H. McGrath, G. A. Vasquez, R. Aaij, M. Artuso, D. Brundu, K. Klimaszewski, C. S. Bolognani, T. Fulghesu, V. Balagura, J. M. Durham, P. A. Günther, O. Schneider, E. Spedicato, R. Ataíde Da Silva, Y. Amhis, Federico de Benedetti, A. Palano, O. Bezshyyko, J. He, A. Massafferri, S. López Soliño, S. Scherl, G. Cavallero, M. Whitehead, R. H. O’Neil, Y. Zhang, A. Gilman, D. M. Shangase, E. Graugés, M. Witek, A. Solovev, D. A. Friday, D. Y. Tou, T. Blake, I. Polyakov, C. Li, M. Vieites Diaz, M. D. Galati, L. A. Granado Cardoso, M. Olocco, A. Chernov, Francesco Sborzacchi, F. C. Glaser, M. 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Arguedas Cuendis, G. Martelli, Kunal Garg, P. Camargo Magalhaes, F. Gonçalves Abrantes, N. Neufeld, D. Zhang, Sam Michael Dekkers, A. Contu, N. Sagidova, M. Fernández Gómez, A. Scarabotto, A. Lopez Huertas, J. A. Ward, M. Calvo Gomez, E. Santovetti, Izaac Sanderswood, A. S. W. Abdelmotteleb, I. Belov, F. Martínez-Vidal, B. Meadows, C. Kar, Rashi Sharma, Juliette Authier, M. Faria, M. Gersabeck, F. Redi, K. Li, A. Venkateswaran, H. Jage, R. Van Laak, F. L. Souza De Almeida, Viktor Mytrochenko, A. Perrevoort, L. Felkowski, H. Pham, M. Korolev, Alexander Korchin, C. Patrignani, V. Cavallini, Paloma Laguarta Gonzalez, M. Winn, M. Hartmann, Xiaofan Pan, D. Wiedner, I. Shchemerov, R. Gao, M. Firlej, A. M. Marshall, R. A. Mohammed, V. Sriskaran, G. Tuci, K. Smith, N. Schulte, Mohamed Elashri, G. Pietrzyk, P. Naik, E. Graverini, Isadora Gonçales Vaz, J. Mazorra de Cos, M. Ramírez García, В.А. Кушнир, R. A. Fini, A. Gallas Torreira, Felicia Carolin Volle, C. Matteuzzi, A. Bitadze, A. 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De Simone, L. Sun, L. Martel, T. Boettcher, L. Carcedo Salgado, G. Galati, Esteban Currás Rivera, Y. Gao, J. H. Lopes, X. Tong, J. García Pardiñas, Chucheng Pan, S. Vecchi, N. V. Biesuz, L. Grillo, J. Daniel, Alexander Davidson, M. Borsato, Jike Wang, D. H. Cámpora Pérez, D. Torres Machado, N. Skidmore, Paula Herrero Gascon, P. Koppenburg, J. F. Marchand, R. A. Ruiz Fernandez, S. Klaver, B. Adeva, M. J. Williams, X. Zhou, S. De Capua, L. Shchutska, Vladimir Bocharnikov, S. Neubert, M. R. Kmiec, A. Lupato, M. Sarpis, U. Thoma, M. De Cian, I. Bediaga, U. Marconi, F. Lazzari, S. Cadeddu, L. Shekhtman, H. Bao, J. A. Gooding, C. Aidala, M. Kane, S. Gromov, Alex Fomin, F. C. R. Bishop, M. Rebollo De Miguel, B. Wang, S. Mariani, Graham Hallett, I. Kostiuk, J. J. Lane, C. Frei, K. De Bruyn, R. Bolzonella, L. Golinka-Bezshyyko, J. Nicolini, J. Deng, M. Saur, Vasyl Dobishuk, E. Aslanides, C. Vrahas, J. Marks, T. Poeschl, T. Gys, B. Pagare, Elizabeth Marie Kowalczyk, C. Gaspar, E. J. Walton, S. Joshi, Q. Zou, E. Muhammad, X. Han, F. Debernardis, V. Zhukov, J. Cottee Meldrum, D. Maisuzenko, C. Zeng, Igor Kyryllin, E. Polycarpo, W. Sutcliffe, Kate Lynch, F. Suljik, N. Sahoo, R. Bernet, C. D’Ambrosio, A. Golutvin, Lucas Dittmann, M. P. Morgenthaler, M. Mazurek, H. Gao, D. Foulds-Holt, G. Liu, P. Krokovny, M. Birch, A. Semennikov, C. U. Perez, K. Wyllie, M. McCann, F. Fleuret, A. B. Morris, P. Adlarson, P. Campana, S. Kandybei, V. Franco Lima, Elia Bottalico, Louis Lenard Gerken, S. Blusk, M. van Veghel, S. T’Jampens, Jonas Nathanael Eschle, A. R. Wiederhold, A. Wang, V. Obraztsov, R. D. L. Henderson, M. Barbetti, S. Esen, A. Poluektov, M. A. Giza, A. T. Burke, S. Chernyshenko, F. Oliva, Daniel Magdalinski, T. Li, N. Nikitin, S. Panebianco, E. Maurice, I. Diachkov, T. Ackernley, J. Moroń, R. Caspary, M. Ferro-Luzzi, J. Herd, X. Yang, C. Hadjivasiliou, R. Wang, Y. Tan, V. Zhovkovska, Elisabeth Maria Niel, T. Pajero, G. Casse, S. Qu, Y. Zhou, G. Nowak, L. M. Greeven, L. N. Falcao, G. Passaleva, C. Santamarina Ríos, M. Wang, J. A. Boelhauve, R. Nandakumar, S. Schael, M. W. Dudek, H. K. Giemza, M. Hushchyn, M. Schmelling, M. Andreotti, K. Rinnert, K. Farmer, F. Keizer, P. Gandini, J. J. Malczewski, К. Ившин, G. Morello, M. Goncerz, K. Habermann, H. Van Hecke, F. Betti, J. S. Butter, A. C. dos Reis, H. Miao, A. Jawahery, Shah Rukh Qasim, F. Abudinén, G. Darze, Peilian Li, T. Skwarnicki, F. Teubert, M. Franco Sevilla, D. C. Craik, Nikolai Voropaev, M. Rama, D. Lancierini, D. S. Fitzgerald, V. Pugatch, T. Hadavizadeh, L. Fantini, M. Wilkinson, J. Ruiz Vidal, D. Lucchesi, G. Wang, E. Shmanin, H. Cai, O. Lantwin, V. Coco, E. Lemos Cid, Ester Pino, S. Ding, J. Albrecht, L. Witola, A. Comerma-Montells, L. Cojocariu, F. Dettori, Z. Xiang, Rebecca Murta, R. Calabrese, S. Akar, L. Anderlini, J. Ellbracht, J. J. Saborido Silva, J. D. Shupperd, N. Serra, L. F. Foreman, A. Paul, A. Li, Victoria Valcarce Cadenas, M. S. Bieker, L. Capriotti, P. Cifra, J. Wendel, D. Kaminaris, M. Patel, J. Wang, A. Bohare, J. I. Cambon Bouzas, C. Cocha Toapaxi, A. D. Docheva, Pasquale Andreola, F. I. Giasemis, L. Grazette, Anni Kauniskangas, Bogdan Kutsenko, M. J. Madurai, F. Muñoz-Rojas, Piet Nogga, H. N. Nur, Daniele Passaro, J. Patoc, Gabriel Ricart, Gabriele Romolini, J. Bex, Francesca Swystun, Matteo Argenton, Pierre Paul Louis Mayencourt, Francesco Terzuoli, L. H. Uecker, Guillermo Hijano Mendizabal, Jacob Pfaller, Ozgur Durmus, J. Wagner, A. A. Adefisoye, Simone Libralon, M. Verdoglia, Bilal Ahmad Ganie, Oleksandr Kshyvanskyi, Pedro Nogarolli, Andrej Sarnatskiy, Eleanor Whiter, Xenofon Chiotopoulos, Juan Jose Juan Castella, Luca Balzani, Piera Battista, Donata Osthues, Noah Albin Behling, P. R. Li, Yuhao Wang, Ziyi Wang, Ming Zeng, Jianyu Zhang, M. Xu, N. Tuning, L. M. Garcia Martin, L. Xu, M. Cattaneo, R. Lefèvre, M. Shapkin, S. Li, M. S. Rudolph, R. Vazquez Gomez, Z. Xu, P. Di Nezza, F. Ratnikov, P. Vázquez Regueiro, D. Johnson, Y. Yang, Z. Zhang, W. Vetens, A. Carbone, A. McNab, M. Karacson, J. Peng, Z. Wu, Xiaoyue Yin, Yintong Song, Shu Xian, Ph. Charpentier, Federico Ronchetti, L. Hao, A. Rogachev, M. Giovannetti, B. A. Shi, Y. Wu, Z. Lian, L. Kravchuk, A. Loi, T. Colombo, W. Hu, D. A. Milanes, A. Xu, M. Salomoni, Shulei Zhang, D. Zuliani, Atanu Modak, S. Kotriakhova, J. Mauricio, Angel Morcillo Gomez, C. White, E. Rodríguez Rodríguez, D. J. D. Thompson, Y. X. Song, M. Williams, R. Marchevski, C. Burr, R. Silva Coutinho, D. Melnychuk, A. Correia, Peng Xu, D. Galli, M. Lucio Martínez, B. Delaney, S. Filippov, D. Strekalina, E. Franzoso, S. R. Roy, S. Ricciardi, G. Robertson, H. Li, A. Villa, C. Normand, X. Jiang, Q. Shi, Victoria Ramos de Oliveira, W. Duan, V. S. Kirsebom, Camilla de Angelis, Y. Kang, Y. J. Jiang, Y. J. Su, P. Kopciewicz, C. X. Lin, M. Feng, V. Chulikov, J. Zhuo, M. Ramos Pernas, L. Buonincontri, A. Ene, J. Brown, Y. T. Tang, J. Sun, Y. Zheng, H. Schmitz, T. H. Harris, T. Zhou, C. Lucarelli, Chanka Jayaweera, Katya Govorkova, S. Didenko, V. Romanovskiy, G. Schwering, Z. Ajaltouni, Chen Chen, W. S. Shi, Evgeniia Nekrasova, L. Xu, E. Ejopu, C. Marín Benito, Roman Litvinov, G. Frau, A. Romero Vidal, Lucas George Girardey, Yuman Cai, O. Okhrimenko, N. Néri, N. K. Watson, F. F. Wilson, C. Bozzi, T. Latham, M. Rotondo, O. Steinkamp, M. S. Soares, M. Veltri, A. G. Morris, S. E. Clark, P. Vincent, C. Wang, Y. Shang, Marcelo Bovill, J. G. Speer, N. W. Wang, L. L. Pappalardo, Saliha Bashir, J. A. de Vries, L. Tomassetti, V. Vagnoni, C. Parkes, P. Neustroev, X. R. Lyu, T. Szumlak, L. Eklund, K. Carvalho Akiba, Z. Yang, J. Van Eldik, R. Cardinale, L. Sestini, S. Chen, M. Andersson, J. Wang, Shunan Zhang, L. Zhang, Q. Han, D. Ao, T. Shears, P. Gardner, A. Szabelski, Pol Vidrier Villalba, Simon Ghizzo, L. Guerry, Francesco Zenesini, Aleksandar Bordelius, Michal Krzysztof Kazanecki, C. B. Van Hulse, A. Kozachuk, O. Deschamps, C. Pappenheimer, A. M. Hennequin, Carlos Abellán Beteta, Thomas Peter Jones, S. Gomez Fernandez, M. Santimaria, G. Panshin, S. Maccolini, Evridki Chatzianagnostou, R. Lindner, S. A. Bouchiba, A. Casais Vidal, V. Egorychev, R. J. Barlow, A. Sergi, A. Ukleja, S. Eisenhardt, Q. Lu, M. Idzik, E. Eckstein, Jou-An Chen, G. Simi, A. Ustyuzhanin, D. Hutchcroft, P. Álvarez Cartelle, T. Nanut, S. Collaviti, X. Cid Vidal, Y. Xie, T. Evans, A. Hicheur, B. Jost, R. Currie, M. Clemencic, S. Amato, P. Robbe, L. Del Buono, S. Hansmann-Menzemer, Yuanchang Zhu, G. Ciezarek, D. Décamp, G. Bencivenni, D. Websdale, F. Maciuc, E. Thomas, J. Cogan, D. Liu, F. Fabiano, U. Uwer, M. Palutan, A. Malinin, V. Gibson, T. Nakada, S. Stahl, R. Zhang, E. Buchanan, F. Machefert, C. Langenbruch, V. Zhukov, D. Popov, H. Yin, Mengran Li, J. H. Rademacker, W. Hulsbergen, M. Gandelman, K. Prasanth, C. Gu, D. Savrina, M. Frank, Daniele Manuzzi, D. Lacarrère, L. Carus, S. Koliiev, B. Khanji, Zirui Wang, C. Göbel, J. Closier, G. Valenti, Y. Ding, Y. Gao, A. Semennikov, Ho Sang Lee, P. Perret, P. K. Resmi, A. Papanestis, J. Langer, A. Pastore, Iaroslava Bezshyiko, F. Stagni, F. Reiss, M. Pepe Altarelli, A. Pellegrino, M. D. Sokoloff, Y. Luo, A. Kharisova, W. B. Qian, C. Nunez, A. Brossa Gonzalo, G. Wilkinson, M. Williams, V. Denysenko, R. Schwemmer, B. Pietrzyk, Lorenzo Malentacca, S. Dadabaev, E. Gushchin, J. Walsh, I. Bachiller, P. Owen, M. Tobin, S. Gambetta, Ezra Douglas Lesser, G. Graziani, S. Ponce, S. Z. Zheng, Sabin Hashmi, F. Alessio, C. Haen, Thomas Wolf, B. Pietrzyk, Hao Chang, A. S. Boldyrev, Guillermo Ordóñez, B. Schmidt, A. Upadhyay, Ned Francis Howarth, Qucheng Qian, Daniel Guillermo Martinez Gomez, David Vico Benet, Yuan Yuan, Esteban Felipe Molina Cardenas, Quentin Führing, Mrityunjoy Singha, Yingao Tang, Y. Jiang, Alois Caillet, A. Iniukhin, R. Hou, M.J. Peters, K. Müller, G. Wan, R. Henderson, A. Washbrook, S. Schmitt, Edoardo Mariani, Jonas Malte Roensch, J. Brodzicka, C. Mancuso, A. Oyanguren, T. Maltsev, L. Dai, I. Belyaev, W. Wiślicki, K. Choi, K. Petridis, M. J. Morello, J. Fu, D. Sahoo, I. Nasteva, U. De Freitas Carneiro Da Graca, C. Satriano, M. Cruz Torres, E. Cogneras, M. Kenzie, C. Vázquez Sierra, G. Raven, E. De Lucia, C. Lazzeroni, Benjamin Urbach, Riccardo Bonacci, Wojciech Gomułka, Henry James Linton, Federico Manganella, Alexia Martorell Granollers, Niclas Sommerfeld, C. Barbero Pretel, L. Moeser, X. Liang, L. Calefice, Y. Z. Zhang, N. Bondar, M. Colonna, C. Li, Beatriz Vivacqua, Christian Andres Coronel, Saba Faghih, Zaratsyan Areg, Borja Sevilla Sanjuan, D. J. D. Thompson, Marta Cobo Marcos, Daniele Provenzano, Francesco Paciolla, Yinghao Wang
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Abstract

A bstract The production ratio of ψ (2 S ) to J/ψ charmonium states is presented as a function of multiplicity in proton-lead collisions at a centre-of-mass energy of $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>8.16</mml:mn> </mml:math> TeV, for both prompt and nonprompt sources. The total luminosity recorded by the LHCb experiment corresponds to 13.6 nb − 1 for p Pb collisions and 20.8 nb − 1 for Pb p collisions, where the first particle corresponds to the particle traveling towards the detector. Measurements are performed in the dimuon final state at forward (backward) centre-of-mass rapidity, with respect to the proton direction, 1 . 5 &lt; y * &lt; 4 . 0 (−5 . 0 &lt; y * &lt; −2 . 5) for p Pb (Pb p ) collisions. A multiplicity dependence of the prompt production ratio is observed in p Pb collisions, whereas no dependence is found in nonprompt production, nor in either prompt or nonprompt production in Pb p collisions. These results suggest that in the Pb-going direction additional suppression mechanisms beyond comover effects may be present, possibly related to the formation of quark-gluon plasma. This highlights a transition from small to large collision systems and provides important insight into the suppression of charmonia in proton-nucleus collisions.

Journal of High Energy PhysicsVol. 2025(11)
University College Dublin (IE), University of Siena (IT), Eötvös Loránd University (HU), University of Pisa (IT), Universidade da Coruña (ES), University of Bergamo (IT), University of Rome Tor Vergata (IT), Universidade Federal do Rio de Janeiro (BR), University of Modena and Reggio Emilia (IT), Uppsala University (SE), Jagiellonian University (PL), Rutherford Appleton Laboratory (GB), Centre National de la Recherche Scientifique (FR), Los Alamos National Laboratory (US), University of Bonn (DE), University of Padua (IT), École Polytechnique (FR), University of Liverpool (GB), Scuola Normale Superiore (IT), Federal Center for Technological Education Celso Suckow da Fonseca (BR), Universitat de València (ES), University of Freiburg (DE), Hunan University (CN), National Autonomous University of Honduras (HN), Délégation Paris 7 (FR), University of Groningen (NL), University of Cagliari (IT), Vilnius University (LT), South China Normal University (CN), University of Milan (IT), Taras Shevchenko National University of Kyiv (UA), Universidad de Alcalá (ES), University of Urbino (IT), Université Clermont Auvergne (FR), Universidade de Santiago de Compostela (ES), TU Dortmund University (DE), University of Ferrara (IT), Peking University (CN), University of Zurich (CH), University of Basilicata (IT), Université Paris Cité (FR), University of Victoria (CA), Aix-Marseille Université (FR), Heidelberg University (DE), University of Cambridge (GB), Cracow University of Technology (PL), Pontifícia Universidade Católica do Rio de Janeiro (BR), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), University of Perugia (IT), Université Paris-Saclay (FR), University of Michigan (US), Kharkiv Institute of Physics and Technology (UA), Australian Regenerative Medicine Institute (AU), CEA Paris-Saclay - Etablissement de Saclay (FR), Machine Intelligence Research Institute (US), University of Manchester (GB), Maastricht University (NL), University of Bristol (GB), Universidad Nacional de Colombia (CO), Wuhan University (CN), University of Warwick (GB), Sorbonne Université (FR), University of Oxford (GB), Central China Normal University (CN), Sorbonne Paris Cité (FR), Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering (RO), National Institute for Subatomic Physics (NL), National Centre for Nuclear Research (PL), Instituto de Física Corpuscular (ES), Laboratoire de Physique de Clermont Auvergne (FR), Laboratoire de Physique Nucléaire et de Hautes Énergies (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Padova (IT), Institute of Nuclear Physics, Polish Academy of Sciences (PL), Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Bari (IT), Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata (IT), FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ), Centro Brasileiro de Pesquisas Físicas (BR), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), CEA Paris-Saclay (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (IT), Institut National de Physique Nucléaire et de Physique des Particules (FR), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (IT), Institute of High Energy Physics (CN), Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca (IT), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Universidad de Ingeniería y Tecnología (PE), Institute for Nuclear Research (UA), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (IT), Laboratoire Leprince-Ringuet (FR), Max Planck Institute for Nuclear Physics (DE), Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT), LIP6 (FR), Istituto Nazionale di Fisica Nucleare, Sezione di Pisa (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (IT), University of Chinese Academy of Sciences (CN), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Lamarr Institute for Machine Learning and Artificial Intelligence, Consejo Nacional de Rectores, State Key Laboratory of Nuclear Physics and Technology, Imperial College London (GB), École Polytechnique Fédérale de Lausanne (CH), The Ohio State University (US), University of Bari Aldo Moro (IT), Universitat Ramon Llull (ES), Monash University (AU), University of Cincinnati (US), Massachusetts Institute of Technology (US), University of Milano-Bicocca (IT), University of Maryland, College Park (US), European Organization for Nuclear Research (CH), AGH University of Krakow (PL), Université Savoie Mont Blanc (FR), Syracuse University (US), Universitat de Barcelona (ES), Henan Normal University (CN), Lanzhou University (CN), University of Glasgow (GB), University of Birmingham (GB), University of Genoa (IT), RWTH Aachen University (DE), Ruhr University Bochum (DE), University of Bologna (IT), University College of Applied Science (PS), University of Edinburgh (GB), Tsinghua University (CN)
National Science Foundation, U.S. Department of Energy, CERN, UK Research and Innovation, Ministerul Cercetării, Inovării şi Digitalizării, Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei', Leverhulme Trust, European Commission, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, National Natural Science Foundation of China, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Bundesministerium für Bildung und Forschung, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Generalitat Valenciana, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Max-Planck-Gesellschaft, Ministerstwo Edukacji i Nauki, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, National Academy of Sciences of Ukraine, Centre National de la Recherche Scientifique, Financiadora de Estudos e Projetos, Région Auvergne-Rhône-Alpes, CAS Center for Excellence in Particle Physics, Australian Research Data Commons, Science and Technology Facilities Council, Deutsches Elektronen-Synchrotron, Agencia Estatal de Investigación, Institute of High Energy Physics, Fundamental Research Funds for the Central Universities, Institut National de Physique Nucléaire et de Physique des Particules, Nuclear Physics, H2020 Marie Skłodowska-Curie Actions
Openalex Percentile: Top 83%
High-Energy Particle Collisions Research
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