Measurement of Transverse Single-Spin Asymmetries for Mid-rapidity Production of Neutral Pions and Charged Hadrons in Polarized p+p Collisions at sqrt(s) = 200 GeV

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dc.creatorPHENIX Collaboration
dc.creatorAdler, S. S.
dc.date2005-07-17
dc.date.accessioned2026-07-07T11:58:08Z
dc.date.available2026-07-07T11:58:08Z
dc.descriptionThe transverse single-spin asymmetries of neutral pions and non-identified charged hadrons have been measured at mid-rapidity in polarized proton-proton collisions at sqrt(s) = 200 GeV. The data cover a transverse momentum (p_T) range 0.5-5.0 GeV/c for charged hadrons and 1.0-5.0 GeV/c for neutral pions, at a Feynman-x (x_F) value of approximately zero. The asymmetries seen in this previously unexplored kinematic region are consistent with zero within statistical errors of a few percent. In addition, the inclusive charged hadron cross section at mid-rapidity from 0.5 < p_T < 7.0 GeV/c is presented and compared to NLO pQCD calculations. Successful description of the unpolarized cross section above ~2 GeV/c using NLO pQCD suggests that pQCD is applicable in the interpretation of the asymmetry results in the relevant kinematic range.
dc.description331 authors, 6 pages text, 2 figures, 3 tables. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
dc.identifierhttps://arxiv.org/abs/hep-ex/0507073
dc.identifierhttp://arxiv.org/abs/hep-ex/0507073
dc.identifierPhys.Rev.Lett.95:202001,2005
dc.identifierdoi:10.1103/PhysRevLett.95.202001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206122
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of Transverse Single-Spin Asymmetries for Mid-rapidity Production of Neutral Pions and Charged Hadrons in Polarized p+p Collisions at sqrt(s) = 200 GeV
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