STAR identifed particle measurements at high transverse momentum in p+p $\sqrt{s}$ = 200 GeV

Details STAR identifed particle measurements at high transverse momentum in p+p $\sqrt{s}$ = 200 GeV STAR identifed particle measurements at high transverse momentum in p+p $\sqrt{s}$ = 200 GeV

2007-07-10

arxiv.org/abs/0707.1510v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, Proceedings for DIS 2007, Munich, Germany

Scientific paper

We present the STAR measurement of transverse momentum spectra at mid-rapidity for identified particles in p+p collisions at $\sqrt{s}$ = 200 GeV. These high statistics data are ideal for comparing to existing leading- and next-to-leading order (NLO) perturbative QCD calculations. Next-to-leading models have been successful in describing inclusive hadron production using parameterized fragmentation functions (FF) for quarks and gluons. However, in order to describe baryon spectra at NLO, knowledge of flavor separated FF is essential. Such FF have recently been parameterized using data by the OPAL experiment and allow for the first time to obtain good agreement between NLO and identified baryons from p+p collisions.

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