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dc.contributor.authorAdare, A.
dc.contributor.authorAidala, C.
dc.contributor.authorAjitanand, N. N.
dc.contributor.authorAkiba, Y.
dc.contributor.authorAkimoto, R.
dc.contributor.authorAl-Ta'ani, H.
dc.contributor.authorAlexander, J.
dc.contributor.authorAndrews, K. R.
dc.contributor.authorAngerami, A.
dc.contributor.authorAoki, K.
dc.contributor.authorKim, Dong Jo
dc.contributor.authorRak, Jan
dc.date.accessioned2014-09-01T10:15:24Z
dc.date.available2014-09-01T10:15:24Z
dc.date.issued2014fi
dc.identifier.citationAdare, A., Aidala, C., Ajitanand, N., Akiba, Y., Akimoto, R., Al-Ta'ani, H., . . . Rak, J. (2014). Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p⃗ +p⃗ collisions at s√=200  GeV. Physical Review D, 90 (1), 012007. doi:10.1103/PhysRevD.90.012007 Retrieved from http://arxiv.org/abs/1402.6296fi
dc.identifier.otherTUTKAID_62421
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/44163
dc.description.abstractAbstract: Results are presented from data recorded in 2009 by the PHENIX experiment at the Relativistic Heavy Ion Collider for the double-longitudinal spin asymmetry, A LL , for π 0 and η production in ffiffiffi s p ¼ 200 GeV polarized p þ p collisions. Comparison of the π 0 results with different theory expectations based on fits of other published data showed a preference for small positive values of gluon polarization, Δ G , in the proton in the probed Bjorken x range. The effect of adding the new 2009 π 0 data to a recent global analysis of polarized scattering data is also shown, resulting in a best fit value Δ G ½ 0 . 05 ; 0 . 2 DSSV ¼ 0 . 06 þ 0 . 11 − 0 . 15 in the range 0 . 05 <x< 0 . 2 , with the uncertainty at Δ χ 2 ¼ 9 when considering only statistical experimental uncertainties. Shifting the PHENIX data points by their systematic uncertainty leads to a variation of the best-fit value of Δ G ½ 0 . 05 ; 0 . 2 DSSV between 0.02 and 0.12, demonstrating the need for full treatment of the experimental systematic uncertainties in future global analyses.fi
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review D
dc.relation.urihttp://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.012007
dc.subject.otherRelativistic Heavy Ion Colliderfi
dc.subject.otherdouble-longitudinal spin asymmetryfi
dc.titleInclusive double-helicity asymmetries in neutral-pion and eta-meson production in p⃗ +p⃗ collisions at s√=200  GeVfi
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201408302689
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineFysiikka
dc.type.urihttp://purl.org/eprint/type/SubmittedJournalArticle
dc.date.updated2014-08-30T03:30:03Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn1550-7998
dc.relation.numberinseries1
dc.relation.volume90
dc.type.versionpublishedVersion
dc.rights.copyright© 2014 American Physical Society. This is an article whose final and definitive form has been published by American Physical Society.
dc.rights.accesslevelopenAccessfi
dc.rights.urlhttp://creativecommons.org/licenses/by/3.0/
dc.relation.doi10.1103/PhysRevD.90.012007


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© 2014 American Physical Society. This is an article whose final and definitive form has been published by American Physical Society.
Except where otherwise noted, this item's license is described as © 2014 American Physical Society. This is an article whose final and definitive form has been published by American Physical Society.