J/psi Production vs Transverse Momentum and Rapidity in p+p Collisions at sqrt(s) = 200 GeV

TL;DR

This paper reports detailed measurements of J/psi production in proton-proton collisions at 200 GeV, covering a wide rapidity and transverse momentum range, providing data to constrain theoretical production models.

Contribution

It presents comprehensive pT and rapidity distributions of J/psi production at RHIC energies, with precise cross section measurements to inform theoretical models.

Findings

Total cross section times branching ratio: 178 +/- 3(stat) +/- 53(syst) +/- 18(norm) nb

Wide rapidity and pT coverage enables detailed production analysis

Data constrains models of J/psi production in high-energy p+p collisions

Abstract

J/Psi production in p+p collisions at sqrt(s) = 200 GeV has been Measured in the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) over a rapidity range of -2.2 < y < 2.2 and a transverse momentum range of 0 < pT < 9 GeV/c. The statistics available allow a detailed measurement of both the pT and rapidity distributions and are sufficient to constrain production models. The total cross section times branching ratio determined for J/Psi production is B_{ll} sigma_pp^J/psi = 178 +/- 3(stat) +/- 53(syst) +/- 18(norm) nb.