Identified charged hadron production in p+p collisions at sqrt(s)=200 and 62.4 GeV

Details Identified charged hadron production in p+p collisions at sqrt(s)=200 and 62.4 GeV Identified charged hadron production in p+p collisions at sqrt(s)=200 and 62.4 GeV

2011-02-03

arxiv.org/abs/1102.0753v1

Phys.Rev.C83:064903,2011

Physics

Nuclear Physics

Nuclear Experiment

431 authors from 62 institutions, 32 pages, 23 figures, and 18 tables. Submitted to Physical Review C. Plain text data tables

Scientific paper

10.1103/PhysRevC.83.064903

Transverse momentum distributions and yields for $\pi^{\pm}$, $K^{\pm}$, $p$ and $\bar{p}$ in $p+p$ collisions at $\sqrt{s}$=200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). These data provide important baseline spectra for comparisons with identified particle spectra in heavy ion collisions at RHIC. We present the inverse slope parameter $T_{\rm inv}$, mean transverse momentum $$ and yield per unit rapidity $dN/dy$ at each energy, and compare them to other measurements at different $\sqrt{s}$ in $p+p$ and $p+\bar{p}$ collisions. We also present the scaling properties such as $m_T$ scaling, $x_T$ scaling on the $p_T$ spectra between different energies. To discuss the mechanism of the particle production in $p+p$ collisions, the measured spectra are compared to next-to-leading-order or next-to-leading-logarithmic perturbative quantum chromodynamics calculations.

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