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Adamová, D.; Agnello, M.; Akbar, Z.; Akindinov, A.; Alkin, A.; Andrei, C.; Andronic, A.; Antonioli, P.; Arcelli, S.; Bartels, C.; Baruffaldi, F.; Basu, S.; Bhasin, A.; Bielčík, J.; Bilandzic, A.; Bombara, M.; Borissov, A.; Camacho, J. M. M.; Chakraborty, P.; Cheng, T.; Chochula, P.; Collu, A.; Dainese, A.; de Cuveland, J.; De Falco, A.; Deng, W.; Durkac, M.; Dzalaiova, N.; Elia, D.; Fecchio, P.; Garcia, J. R. A.; Gargiulo, C.; Garibli, A.; Gautam, A.; Gorbunov, S.; Grosse-Oetringhaus, J. F.; Hellbär, E.; Hornung, S.; Iddon, J. P.; Kabus, M. J.; Karasu Uysal, A.; Karavichev, O.; Kazantsev, A.; Keidel, R.; Kim, C.; Kirsch, S.; Kisel, I.; Klay, J. L.; Kluge, A.; Knospe, A. G.; Kondratyeva, N.; Kotliarov, A.; Králik, I.; Kravčáková, A.; Kreis, L.; Kumar, N.; Kurashvili, P.; Langoy, R.; Lunardon, M.; Mallick, D.; Masera, M.; Mazzilli, M.; Menchaca-Rocha, A.; Miake, Y.; Modak, A.; Moravcova, Z.; Nesbo, S. V.; Nielsen, E. G.; Oliver, M. H.; Otwinowski, J.; Pachmayer, Y.; Peitzmann, T.; Perez, G. M.; Petrov, V.; Petrovici, M.; Pillot, P.; Politano, S.; Pop, A.; Preghenella, R.; Pruneau, C. A.; Ragoni, S.; Rami, F.; Rescakova, Z.; Richter, M.; Riegler, W.; Rogoschinski, T. S.; Skorodumovs, G.; Stiefelmaier, S. F.; Tapia Takaki, J. D.; Thomas, D.; Topilskaya, N.; Torales-Acosta, F.; Trubnikov, V.; Trzcinski, T. P.; Vallero, S.; Vickovic, L.; Wang, C.; Wilk, G.; Wright, J. R.; Zanone, F.
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 $$ \sqrt{s} $$ 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.
