Naslov
Forward rapidity J/ψ production as a function of charged-particle multiplicity in pp collisions at √s = 5.02 and 13 TeV

Autori
Acharya, S. ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Karatović, David ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Journal of High Energy Physics (1029-8479) 2022 (2022), 6; 15, 33

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Hadron-Hadron Scattering ; J/psi(3100): production ; charged particle: multiplicity ; p p: scattering ; yield: ratio ; multiplicity: density ; rapidity ; dimuon ; ALICE ; transverse momentum ; experimental results ; 5020: 13000 GeV-cms/nucleon

Sažetak
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 (dN_ch/dη) 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 (dN_ch/dη/〈dN_ch/dη〉), 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 (pT) of J/ψ in pp collisions exhibits an increasing trend as a function of (dN_ch /dη/〈dN_ch/dη〉) showing a saturation towards high charged-particle multiplicities.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA