J/psi production cross section and its dependence on charged-particle multiplicity in p plus p collisions at root s=200 GeV



Adam, J, Adamczyk, L, Adams, JR, Adkins, JK, Agakishiev, G, Aggarwal, MM, Ahammed, Z, Ajitanand, NN, Alekseev, I, Anderson, DM
et al (show 340 more authors) (2018) J/psi production cross section and its dependence on charged-particle multiplicity in p plus p collisions at root s=200 GeV. PHYSICS LETTERS B, 786. pp. 87-93.

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Abstract

We present a measurement of inclusive $J/\psi$ production at mid-rapidity ($|y|<1$) in $p+p$ collisions at a center-of-mass energy of $\sqrt{s}$ = 200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The differential production cross section for $J/\psi$ as a function of transverse momentum ($p_T$) for $0<p_T<14$ GeV/$c$ and the total cross section are reported and compared to calculations from the color evaporation model and the non-relativistic Quantum Chromodynamics model. The dependence of $J/\psi$ relative yields in three $p_T$ intervals on charged-particle multiplicity at mid-rapidity is measured for the first time in $p+p$ collisions at $\sqrt{s}$ = 200 GeV and compared with that measured at $\sqrt{s}$ = 7 TeV, PYTHIA8 and EPOS3 Monte Carlo generators, and the Percolation model prediction.

Item Type: Article
Additional Information: 10 pages, 4 figures
Uncontrolled Keywords: Quarkonium, p plus p collisions, Multiple parton interactions, Charged-particle multiplicity
Depositing User: Symplectic Admin
Date Deposited: 07 May 2019 10:00
Last Modified: 19 Jan 2023 00:50
DOI: 10.1016/j.physletb.2018.09.029
Open Access URL: https://doi.org/10.1016/j.physletb.2018.09.029
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3040041