J/psi production from proton-proton collisions at sqrt(s) = 200 GeV

TL;DR

This paper reports measurements of J/psi production in proton-proton collisions at 200 GeV, including rapidity and transverse momentum distributions, total cross section, and comparisons with theoretical models.

Contribution

First measurement of J/psi production at 200 GeV in proton-proton collisions with detailed kinematic distributions and cross section analysis.

Findings

Total J/psi cross section: 3.99 micro barns

Mean transverse momentum: 1.80 GeV/c

Distributions compared to theoretical calculations

Abstract

J/psi production has been measured in proton-proton collisions at sqrt(s)= 200 GeV over a wide rapidity and transverse momentum range by the PHENIX experiment at RHIC. Distributions of the rapidity and transverse momentum, along with measurements of the mean transverse momentum and total production cross section are presented and compared to available theoretical calculations. The total J/psi cross section is 3.99 +/- 0.61(stat) +/- 0.58(sys) +/- 0.40(abs) micro barns. The mean transverse momentum is 1.80 +/- 0.23(stat) +/- 0.16(sys) GeV/c.