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Akbar, Z.; Al-Turany, M.; Alam, S. N.; Aleksandrov, D.; Alici, A.; Baek, Y. W.; Bala, R.; Bazo Alba, J. L.; Beole, S.; Berdnikova, A.; Betev, L.; Blume, C.; Boca, G.; Bond, P. M.; Braun-Munzinger, P.; Caliva, A.; Caron, R.; Ceballos Sanchez, C.; Chandra, S.; Ciupek, M. R.; Conesa Balbastre, G.; Contreras, J. G.; Dainese, A.; Danu, A.; Das, P.; Das, P.; Degenhardt, H. F.; Eikeland, V. N.; Erazmus, B.; Erokhin, A.; Ersdal, M. R.; Fecchio, P.; Fiorenza, G.; Fuchs, U.; Galvan, C. D.; Garcia, J. R. A.; Gianotti, P.; González-Trueba, L. H.; Görlich, L.; Grosa, F.; Gunji, T.; Harris, J. W.; Hong, G. H.; Hornung, S.; Jaelani, S.; Kim, J.; Klemenz, T.; Konopka, P. J.; Koryciak, S. D.; Kweon, M. J.; Lemmon, R. C.; Lien, J.; Luparello, G.; Mager, M.; Malinina, L.; Martin, N. A.; Mazzaschi, F.; Melikyan, Y.; Mhlanga, S.; Murray, S.; Nattrass, C.; Nellen, L.; Nomokonov, P.; Oliver, M. H.; Pereira, L. G.; Pisano, S.; Quishpe, R. E.; Raniwala, R.; Rath, R.; Read, K. F.; Redelbach, A. R.; Riabov, A.; Rogoschinski, T. S.; Rossi, A.; Roy, A.; Roy, S.; Rui, R.; Ryabinkin, E.; Sahu, D.; Sarti, V. M.; Scheid, H. S.; Schmidt, M.; Scioli, G.; Skaali, T. B.; Soncco, C.; Stocco, D.; Sultanov, R.; Tejeda Muñoz, G.; Thakur, D.; Trzaska, W. H.; Trzcinski, T. P.; Urioni, M.; Vasileiou, M.; Vergara Limón, S.; Virgili, T.; Winn, M.; Wu, W.; Yin, Z.; Zhang, X.; Zhang, Y.
The journal of high energy physics, 06/2022, Letnik: 2022, Številka: 6Journal Article
A bstract The production of J/ ψ is measured as a function of charged-particle multiplicity at forward rapidity in proton-proton (pp) collisions at center-of-mass energies s = 5.02 and 13 TeV. The J/ ψ mesons are reconstructed via their decay into dimuons in the rapidity interval (2.5 < y < 4.0), whereas the charged-particle multiplicity density (d N ch / d η ) is measured at midrapidity ( |η| < 1). The production rate as a function of multiplicity is reported as the ratio of the yield in a given multiplicity interval to the multiplicity-integrated one. This observable shows a linear increase with charged-particle multiplicity normalized to the corresponding average value for inelastic events (d N ch /d η /〈d N ch /d η 〉), at both the colliding energies. Measurements are compared with available ALICE results at midrapidity and theoretical model calculations. First measurement of the mean transverse momentum (〈 p T 〉) of J/ ψ in pp collisions exhibits an increasing trend as a function of d N ch /d η /〈d N ch /d η 〉 showing a saturation towards high charged-particle multiplicities.
