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Two-particle angular correlations probe particle production mechanisms and the underlying event-wide phenomena present in hadronic collisions. The correlations are examined as a function of rapidity and azimuthal-angle differences (Δy,Δφ) for pairs of like- and unlike-sign pions, kaons, and (anti-)protons produced in pp collisions at s = 13 TeV, measured by the ALICE experiment. Two-particle correlation functions are provided together with Δy and Δφ projections and compared to Monte Carlo (MC) model predictions. For the first time, the measurement is performed as a function of the event’s charged-particle density. Previous studies conducted for pp collisions at s = 7 TeV at ALICE revealed a near-side anticorrelation for baryon–baryon and antibaryon–antibaryon pairs, whose origin remains unresolved. Here, an additional approach is introduced to study the multiplicity dependence and the expected inverse multiplicity scaling of the correlation function. This method highlights qualitative differences in the underlying sources of correlations, such as quantum-statistics effects, final-state interactions, and resonance decays. The puzzling near-side anticorrelation in baryon baryon measurements is observed across all multiplicity classes and continues to challenge current particle-production models. Furthermore, the multiplicity dependence of the correlations between mesons provides an independent probe of the sensitivity of current MC models to soft-QCD effects and hadronization dynamics. The presented measurements, together with the baryon results, enrich the experimental picture of two-particle correlations in pp collisions and serve as valuable input for ongoing theoretical developments.
Multiplicity dependence of two-particle angular correlations of identified particles in pp collisions at $$\mathbf {\sqrt{s} = 13}$$ TeV / Null, N., Abualrob, I.J., Acharya, S., Rinella, G.A., Aglietta, L., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z.U.L., Akindinov, A., Akishina, V., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, B., Alici, A., Alkin, A., Alme, J., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 86:7(2026). [10.1140/epjc/s10052-026-15447-z]
Multiplicity dependence of two-particle angular correlations of identified particles in pp collisions at $$\mathbf {\sqrt{s} = 13}$$ TeV
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A. D.;Castillo Castellanos, J.;Castoldi, M.;Catalano, F.;Cattaruzzi, S.;Cerri, R.;Chakaberia, I.;Chakraborty, P.;Chan, J. W. O.;Chandra, S.;Chapeland, S.;Chartier, M.;Chattopadhay, S.;Chen, M.;Cheng, T.;Cheshkov, C.;Chiappara, D.;Barroso, V. Chibante;Chinellato, D. D.;Chinu, F.;Chizzali, E. S.;Cho, J.;Cho, S.;Chochula, P.;Chochulska, Z. A.;Christakoglou, P.;Christensen, C. H.;Christiansen, P.;Chujo, T.;Chytla, B.;Ciacco, M.;Cicalo, C.;Cimador, G.;Cindolo, F.;Colamaria, F.;Colella, D.;Colelli, A.;Colocci, M.;Concas, M.;Balbastre, G. Conesa;del Valle, Z. Conesa;Contin, G.;Contreras, J. G.;Coquet, M. L.;Cortese, P.;Cosentino, M. R.;Costa, F.;Costanza, S.;Crochet, P.;Czarnynoga, M. M.;Dainese, A.;Dange, G.;Danisch, M. C.;Danu, A.;Daribayeva, A.;Das, P.;Das, S.;Dash, A. R.;Dash, S.;De Caro, A.;de Cataldo, G.;de Cuveland, J.;De Falco, A.;De Gruttola, D.;De Marco, N.;De Martin, C.;De Pasquale, S.;Deb, R.;Del Grande, R.;Stritto, L. Dello;de Souza, G. G. 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A.;Giacalone, M.;Gioachin, G.;Giri, S. K.;Giubellino, P.;Giubilato, P.;Glässel, P.;Glimos, E.;Gonella, L.;Gonzalez, V.;Gorgon, M.;Goswami, K.;Gotovac, S.;Grabski, V.;Graczykowski, L. K.;Grecka, E.;Grelli, A.;Grigoras, C.;Grigoriev, V.;Grigoryan, S.;Groettvik, O. S.;Grosa, F.;Gross-Bölting, S.;Grosse-Oetringhaus, J. F.;Grosso, R.;Grund, D.;Grunwald, N. A.;Guernane, R.;Guilbaud, M.;Gulbrandsen, K.;Gumprecht, J. K.;Gündem, T.;Gunji, T.;Guo, J.;Guo, W.;Gupta, A.;Gupta, R.;Gupta, R.;Gwizdziel, K.;Gyulai, L.;Hadjidakis, C.;Haider, F. U.;Haidlova, S.;Haldar, M.;Hamagaki, H.;Han, Y.;Hanley, B. G.;Hannigan, R.;Hansen, J.;Harris, J. W.;Harton, A.;Hartung, M. V.;Hasan, A.;Hassan, H.;Hatzifotiadou, D.;Hauer, P.;Havener, L. B.;Hellbär, E.;Helstrup, H.;Hemmer, M.;Herman, T.;Hernandez, S. G.;Corral, G. Herrera;Hetland, K. F.;Heybeck, B.;Hillemanns, H.;Hippolyte, B.;Hobus, I. P. M.;Hoffmann, F. W.;Hofman, B.;Horst, M.;Horzyk, A.;Hou, Y.;Hristov, P.;Huhn, P.;Huhta, L. M.;Humanic, T. J.;Humlova, V.;Husar, M.;Hutson, A.;Hutter, D.;Hwang, M. C.;Ilkaev, R.;Inaba, M.;Ippolitov, M.;Isakov, A.;Isidori, T.;Islam, M. S.;Ivanov, M.;Ivanov, M.;Iversen, K. E.;Kim, J. G.;Jablonski, M.;Jacak, B.;Jacazio, N.;Jacobs, P. M.;Jadlovska, A.;Jadlovska, S.;Jaelani, S.;Jahnke, C.;Jakubowska, M. J.;Jamro, E. P.;Janik, D. M.;Janik, M. A.;Ji, S.;Ji, Y.;Jia, S.;Jiang, T.;Jimenez, A. A. P.;Jin, S.;Johnson, M. A. T.;Jonas, F.;Jones, D. M.;Jowett, J. M.;Jung, J.;Jung, M.;Junique, A.;Juracka, J.;Jusko, A.;Kashyap, V. K. S.;Kaewjai, J.;Kalinak, P.;Kalweit, A.;Karasu Uysal, A.;Karatzenis, N.;Karavichev, O.;Karavicheva, T.;Karwowska, M. J.;Keil, M.;Ketzer, B.;Keul, J.;Khade, S. S.;Khan, A. M.;Khanzadeev, A.;Kharlov, Y.;Khatun, A.;Khuntia, A.;Khuranova, Z.;Kileng, B.;Kim, B.;Kim, D. J.;Kim, D.;Kim, E. J.;Kim, G.;Kim, H.;Kim, J.;Kim, J.;Kim, J.;Kim, M.;Kim, S.;Kim, T.;Kinner, J. T.;Kirsch, S.;Kisel, I.;Kiselev, S.;Kisiel, A.;Klay, J. L.;Klein, J.;Klein, S.;Klein-Bösing, C.;Kleiner, M.;Kluge, A.;Knuesel, M. B.;Kobdaj, C.;Kohara, R.;Kondratyev, A.;Kondratyeva, N.;Konig, J.;Konopka, P. J.;Kornakov, G.;Korwieser, M.;Koster, C.;Kotliarov, A.;Kovacic, N.;Kovalenko, V.;Kowalski, M.;Kozhuharov, V.;Kozlov, G.;Králik, I.;Kravčáková, A.;Krawczyk, M. A.;Krcal, L.;Krivda, M.;Krizek, F.;Gajdosova, K. Krizkova;Krug, C.;Krüger, M.;Kryshen, E.;Kučera, V.;Kuhn, C.;Kumar, D.;Kumar, L.;Kumar, N.;Kumar, S.;Kundu, S.;Kuo, M.;Kurashvili, P.;Kurepin, A. B.;Kurita, S.;Kuryakin, A.;Kushpil, S.;Kuznetsov, A.;Kweon, M. J.;Kwon, Y.;La Pointe, S. L.;La Rocca, P.;Lakrathok, A.;Lambert, S.;Landou, A. R.;Langoy, R.;Larionov, P.;Laudi, E.;Lautner, L.;Laveaga, R. A. N.;Lavicka, R.;Lea, R.;Lebert, J. B.;Lee, H.;Legrand, I.;Legras, G.;Lejeune, A. M.;Lelek, T. M.;León Monzón, I.;Lesch, M. M.;Lévai, P.;Li, M.;Li, P.;Li, X.;Liang-Gilman, B. E.;Lien, J.;Lietava, R.;Likmeta, I.;Lim, B.;Lim, H.;Lim, S. 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U.;Mikhaylov, K.;Millot, L.;Minafra, N.;Miśkowiec, D.;Modak, A.;Mohanty, B.;Mohisin Khan, M.;Molander, M. A.;Mondal, M. M.;Monira, S.;Moreira De Godoy, D. A.;Morsch, A.;Mrnjavac, T.;Mrozinski, S.;Muccifora, V.;Muhuri, S.;Mulliri, A.;Munhoz, M. G.;Munzer, R. H.;Musa, L.;Musinsky, J.;Myrcha, J. W.;Naik, B.;Nambrath, A. I.;Nandi, B. K.;Nania, R.;Nappi, E.;Nassirpour, A. F.;Nastase, V.;Nath, A.;Nathanson, N. F.;Naumov, K.;Neagu, A.;Nellen, L.;Nepeivoda, R.;Nese, S.;Nicassio, N.;Nielsen, B. S.;Nielsen, E. G.;Nikolaev, S.;Nikulin, V.;Noferini, F.;Noh, S.;Nomokonov, P.;Norman, J.;Novitzky, N.;Nyanin, A.;Nystrand, J.;Ockleton, M. R.;Ogino, M.;Oh, J.;Oh, S.;Ohlson, A.;Oida, M.;Okorokov, V. A.;Oppedisano, C.;Ortiz Velasquez, A.;Osanai, H.;Otwinowski, J.;Oya, M.;Oyama, K.;Padhan, S.;Pagano, D.;Paić, G.;Paisano-Guzmán, S.;Palasciano, A.;Panasenko, I.;Panigrahi, P.;Pantouvakis, C.;Park, H.;Park, J.;Park, S.;Park, T. Y.;Parkkila, J. E.;Pati, P. B.;Patley, Y.;Patra, R. N.;Paudel, P.;Paul, B.;Pazdic, F.;Pei, H.;Peitzmann, T.;Peng, X.;Perciballi, S.;Peresunko, D.;Perez, G. M.;Pestov, Y.;Petrovici, M.;Piano, S.;Pikna, M.;Pillot, P.;Pinazza, O.;Pinto, C.;Pisano, S.;Płoskoń, M.;Plachta, A.;Planinic, M.;Plociennik, D. K.;Poghosyan, M. G.;Polichtchouk, B.;Politano, S.;Poljak, N.;Pop, A.;Porteboeuf-Houssais, S.;Potgieter, J. S.;Pozos, I. Y.;Pradhan, K. K.;Prasad, S. K.;Prasad, S.;Preghenella, R.;Prino, F.;Pruneau, C. A.;Pshenichnov, I.;Puccio, M.;Pucillo, S.;Pulawski, S.;Quaglia, L.;Radhakrishnan, A. M. K.;Ragoni, S.;Rai, A.;Rakotozafindrabe, A.;Ramasubramanian, N.;Ramello, L.;Ramírez-Álvarez, C. O.;Rasa, M.;Räsänen, S. S.;Rath, R.;Rauch, M. P.;Ravasenga, I.;Read, K. F.;Reckziegel, C.;Redelbach, A. R.;Redlich, K.;Reetz, C. A.;Regules-Medel, H. D.;Rehman, A.;Reidt, F.;Reme-Ness, H. A.;Reygers, K.;Ricci, R.;Richter, M.;Riedel, A. A.;Riegler, W.;Riffero, A. G.;Rignanese, M.;Ripoli, C.;Ristea, C.;Rodriguez, M. 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A.;Volpe, G.;von Haller, B.;Vorobyev, I.;Vozniuk, N.;Vrláková, J.;Wan, J.;Wang, C.;Wang, D.;Wang, Y.;Wang, Y.;Wang, Z.;Weiglhofer, F.;Wenzel, S. C.;Wessels, J. P.;Wiacek, P. K.;Wiechula, J.;Wikne, J.;Wilk, G.;Wilkinson, J.;Willems, G. A.;Windelband, B.;Witte, J.;Wojnar, M.;Wright, J. R.;Wu, C. -T.;Wu, W.;Wu, Y.;Xiong, K.;Xiong, Z.;Xu, L.;Xu, R.;Yadav, A.;Yadav, A. K.;Yamaguchi, Y.;Yang, S.;Yang, S.;Yano, S.;Ye, Z.;Yeats, E. R.;Yi, J.;Yin, R.;Yin, Z.;Yoo, I. -K.;Yoon, J. H.;Yu, H.;Yuan, S.;Yuncu, A.;Zaccolo, V.;Zampolli, C.;Zanone, F.;Zardoshti, N.;Závada, P.;Zhang, B.;Zhang, C.;Zhang, L.;Zhang, M.;Zhang, M.;Zhang, S.;Zhang, X.;Zhang, Y.;Zhang, Y.;Zhang, Z.;Zherebchevskii, V.;Zhi, Y.;Zhou, D.;Zhou, Y.;Zhu, J.;Zhu, S.;Zhu, Y.;Zingaretti, A.;Zugravel, S. C.;Zurlo, N.
2026
Abstract
Two-particle angular correlations probe particle production mechanisms and the underlying event-wide phenomena present in hadronic collisions. The correlations are examined as a function of rapidity and azimuthal-angle differences (Δy,Δφ) for pairs of like- and unlike-sign pions, kaons, and (anti-)protons produced in pp collisions at s = 13 TeV, measured by the ALICE experiment. Two-particle correlation functions are provided together with Δy and Δφ projections and compared to Monte Carlo (MC) model predictions. For the first time, the measurement is performed as a function of the event’s charged-particle density. Previous studies conducted for pp collisions at s = 7 TeV at ALICE revealed a near-side anticorrelation for baryon–baryon and antibaryon–antibaryon pairs, whose origin remains unresolved. Here, an additional approach is introduced to study the multiplicity dependence and the expected inverse multiplicity scaling of the correlation function. This method highlights qualitative differences in the underlying sources of correlations, such as quantum-statistics effects, final-state interactions, and resonance decays. The puzzling near-side anticorrelation in baryon baryon measurements is observed across all multiplicity classes and continues to challenge current particle-production models. Furthermore, the multiplicity dependence of the correlations between mesons provides an independent probe of the sensitivity of current MC models to soft-QCD effects and hadronization dynamics. The presented measurements, together with the baryon results, enrich the experimental picture of two-particle correlations in pp collisions and serve as valuable input for ongoing theoretical developments.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/3016074
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.
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