Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+p collisions at √s=62.4GeV

PHENIX Collaboration

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from p+p collisions at √s=62.4GeV are presented. The PHENIX measurement of the cross sections for 1.0<p T<4.5GeV/c are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, α s. Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05x gluon 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.

Original languageEnglish
Article number092006
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume86
Issue number9
DOIs
StatePublished - 8 Nov 2012
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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