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dc.contributor.authorPHENIX Collaboration
dc.date.accessioned2016-06-06T05:31:36Z
dc.date.available2016-06-06T05:31:36Z
dc.date.issued2016
dc.identifier.citationPHENIX Collaboration. (2016). Inclusive cross section and double-helicity asymmetry for π0 production at midrapidity in p+p collisions at √s = 510 GeV. <i>Physical Review D</i>, <i>93</i>(1), Article 011501. <a href="https://doi.org/10.1103/PhysRevD.93.011501" target="_blank">https://doi.org/10.1103/PhysRevD.93.011501</a>
dc.identifier.otherCONVID_25519759
dc.identifier.otherTUTKAID_69024
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50114
dc.description.abstractPHENIX measurements are presented for the cross section and double-helicity asymmetry (ALL) in inclusive π0 production at midrapidity from p þ p collisions at ffiffi s p ¼ 510 GeV from data taken in 2012 and 2013 at the Relativistic Heavy Ion Collider. The next-to-leading-order perturbative-quantumchromodynamics theory calculation is in excellent agreement with the presented cross section results. The calculation utilized parton-to-pion fragmentation functions from the recent DSS14 global analysis, which prefer a smaller gluon-to-pion fragmentation function. The π0ALL results follow an increasingly positive asymmetry trend with pT and ffiffi s p with respect to the predictions and are in excellent agreement with the latest global analysis results. This analysis incorporated earlier results on π0 and jet ALL and suggested a positive contribution of gluon polarization to the spin of the proton ΔG for the gluon momentum fraction range x > 0.05. The data presented here extend to a currently unexplored region, down to x ∼ 0.01, and thus provide additional constraints on the value of ΔG.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review D
dc.subject.otherp+p collisions
dc.subject.otherpions
dc.titleInclusive cross section and double-helicity asymmetry for π0 production at midrapidity in p+p collisions at √s = 510 GeV
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201606032868
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-06-03T12:15:03Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn1550-7998
dc.relation.numberinseries1
dc.relation.volume93
dc.type.versionpublishedVersion
dc.rights.copyright© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1103/PhysRevD.93.011501
dc.type.okmA1


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