Cross Sections and Transverse Single-Spin Asymmetries in Forward Neutral-Pion Production from Proton Collisions at \sqrt{s} = 200 GeV

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dc.creatorSTAR Collaboration
dc.creatorAdams, J.
dc.date2003-10-29
dc.date2004-04-29
dc.date.accessioned2026-07-07T11:30:18Z
dc.date.available2026-07-07T11:30:18Z
dc.descriptionMeasurements of the production of forward high-energy pi0 mesons from transversely polarized proton collisions at \sqrt{s}=200 GeV are reported. The cross section is generally consistent with next-to-leading order perturbative QCD calculations. The analyzing power is small at x_F below about 0.3, and becomes positive and large at higher x_F, similar to the trend in data at \sqrt{s}<=20 GeV. The analyzing power is in qualitative agreement with perturbative QCD model expectations. This is the first significant spin result seen for particles produced with p_T>1 GeV/c at a polarized proton collider.
dc.description6 pages, 3 figures. v2 with minor formatting and text changes as requested by Phys. Rev. Lett. Plain text table of data in these figures and other STAR publications may be found at http://www.star.bnl.gov/central/publications/
dc.identifierhttps://arxiv.org/abs/hep-ex/0310058
dc.identifierhttp://arxiv.org/abs/hep-ex/0310058
dc.identifierPhys.Rev.Lett.92:171801,2004
dc.identifierdoi:10.1103/PhysRevLett.92.171801
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196973
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Experiment
dc.titleCross Sections and Transverse Single-Spin Asymmetries in Forward Neutral-Pion Production from Proton Collisions at \sqrt{s} = 200 GeV
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