Evidence for X(3872) in Pb-Pb Collisions and Studies of its Prompt Production at sNN =5.02 TeV
Articolo
Data di Pubblicazione:
2022
Abstract:
The first evidence for X(3872) production in relativistic heavy ion collisions is reported. The X(3872) production is studied in lead-lead (Pb-Pb) collisions at a center-of-mass energy of root s(NN) = 5.02 TeV per nucleon pair, using the decay chain X(3872) -> J/psi pi(+)pi(-) -> mu(+) mu(-) pi(+)pi(-). The data were recorded with the CMS detector in 2018 and correspond to an integrated luminosity of 1.7 nb(-1). The measurement is performed in the rapidity and transverse momentum ranges vertical bar y vertical bar < 1.6 and 15 < p(T) < 50 GeV/c. The significance of the inclusive X(3872) signal is 4.2 standard deviations. The prompt X(3872) to psi 2S yield ratio is found to be rho(Pb-Pb) = 1.08 +/- 0.49(stat) +/- 0.52(syst), to be compared with typical values of 0.1 for pp collisions. This result provides a unique experimental input to theoretical models of the X(3872) production mechanism, and of the nature of this exotic state.
Tipologia CRIS:
1.1 Articolo in rivista
Elenco autori:
Sirunyan, A M; Tumasyan, A; Adam, W; Ambrogi, F; Bergauer, T; Dragicevic, M; Erö, J; Escalante Del Valle, A; Flechl, M; Frühwirth, R; Jeitler, M; Krammer, N; Krätschmer, I; Liko, D; Madlener, T; Mikulec, I; Rad, N; Schieck, J; Schöfbeck, R; Spanring, M; Waltenberger, W; Wulz, C-E; Zarucki, M; Drugakov, V; Mossolov, V; Suarez Gonzalez, J; Darwish, M R; De Wolf, E A; Di Croce, D; Janssen, X; Kello, T; Lelek, A; Pieters, M; Rejeb Sfar, H; Van Haevermaet, H; Van Mechelen, P; Van Putte, S; Van Remortel, N; Blekman, F; Bols, E S; Chhibra, S S; D'Hondt, J; De Clercq, J; Lontkovskyi, D; Lowette, S; Marchesini, I; Moortgat, S; Python, Q; Tavernier, S; Van Doninck, W; Van Mulders, P; Beghin, D; Bilin, B; Clerbaux, B; De Lentdecker, G; Delannoy, H; Dorney, B; Favart, L; Grebenyuk, A; Kalsi, A K; Moureaux, L; Popov, A; Postiau, N; Starling, E; Thomas, L; Vander Velde, C; Vanlaer, P; Vannerom, D; Cornelis, T; Dobur, D; Khvastunov, I; Niedziela, M; Roskas, C; Skovpen, K; Tytgat, M; Verbeke, W; Vermassen, B; Vit, M; Bruno, G; Caputo, C; David, P; Delaere, C; Delcourt, M; Giammanco, A; Lemaitre, V; Prisciandaro, J; Saggio, A; Vischia, P; Zobec, J; Alves, G A; Correia Silva, G; Hensel, C; Moraes, A; Belchior Batista Das Chagas, E; Carvalho, W; Chinellato, J; Coelho, E; Da Costa, E M; Da Silveira, G G; De Jesus Damiao, D; De Oliveira Martins, C; Fonseca De Souza, S; Malbouisson, H; Martins, J; Matos Figueiredo, D; Medina Jaime, M; Melo De Almeida, M; Mora Herrera, C; Mundim, L; Nogima, H; Prado Da Silva, W L; Rebello Teles, P; Sanchez Rosas, L J; Santoro, A; Sznajder, A; Thiel, M; Tonelli Manganote, E J; Torres Da Silva De Araujo, F; Vilela Pereira, A; Bernardes, C A; Calligaris, L; Tomei, T R Fernandez Perez; Gregores, E M; Lemos, D S; Mercadante, P G; Novaes, S F; Padula, Sandra S; Aleksandrov, A; Antchev, G; Hadjiiska, R; Iaydjiev, P; Misheva, M; Rodozov, M; Shopova, M; Sultanov, G; Bonchev, M; Dimitrov, A; Ivanov, T; Litov, L; Pavlov, B; Petkov, P; Petrov, A; Fang, W; Gao, X; Yuan, L; Ahmad, M; Hu, Z; Wang, Y; Chen, G M; Chen, H S; Chen, M; Jiang, C H; Leggat, D; Liao, H; Liu, Z; Spiezia, A; Tao, J; Yazgan, E; Zhang, H; Zhang, S; Zhao, J; Agapitos, A; Ban, Y; Chen, G; Levin, A; Li, J; Li, L; Li, Q; Mao, Y; Qian, S J; Wang, D; Wang, Q; Xiao, M; Avila, C; Cabrera, A; Florez, C; González Hernández, C F; Segura Delgado, M A; Mejia Guisao, J; Ruiz Alvarez, J D; Salazar González, C A; Vanegas Arbelaez, N; Giljanović, D; Godinovic, N; Lelas, D; Puljak, I; Sculac, T; Antunovic, Z; Kovac, M; Brigljevic, V; Ferencek, D; Kadija, K; Mesic, B; Roguljic, M; Starodumov, A; Susa, T; Ather, M W; Attikis, A; Erodotou, E; Ioannou, A; Kolosova, M; Konstantinou, S; Mavromanolakis, G; Mousa, J; Nicolaou, C; Ptochos, F; Razis, P A; Rykaczewski, H; Saka, H; Tsiakkouri, D; Finger, M; Finger, M; Kveton, A; Tomsa, J; Ayala, E; Carrera Jarrin, E; Mahmoud, M A; Mohammed, Y; Bhowmik, S; Carvalho Antunes De Oliveira, A; Dewanjee, R K; Ehataht, K; Kadastik, M; Raidal, M; Veelken, C; Eerola, P; Forthomme, L; Kirschenmann, H; Osterberg, K; Voutilainen, M; Garcia, F; Havukainen, J; Heikkilä, J K; Karimäki, V; Kim, M S; Kinnunen, R; Lampén, T; Lassila-Perini, K; Laurila, S; Lehti, S; Lindén, T; Siikonen, H; Tuominen, E; Tuominiemi, J; Luukka, P; Tuuva, T; Besancon, M; Couderc, F; Dejardin, M; Denegri, D; Fabbro, B; Faure, J L; Ferri, F; Ganjour, S; Givernaud, A; Gras, P; Hamel de Monchenault, G; Jarry, P; Leloup, C; Lenzi, B; Locci, E; Malcles, J; Rander, J; Rosowsky, A; Sahin, M Ö; Savoy-Navarro, A; Titov, M; Yu, G B; Ahuja, S; Amendola, C; Beaudette, F; Bonanomi, M; Busson, P; Charlot, C; Diab, B; Falmagne, G; Granier de Cassagnac, R; Kucher, I; Lobanov, A; Martin Perez, C; Nguyen, M; Ochando, C; Paganini, P; Rembser, J; Salerno, R; Sauvan, J B; Sirois, Y; Zabi, A; Zghiche, A; Agram, J-L; Andrea, J; Bloch, D; Bourgatte, G; Brom, J-M; Chabert, E C; Collard, C; Conte, E; Fontaine, J-C; Gelé, D; Goerlach, U; Grimault, C; Le Bih
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