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dc.contributor.authorPHENIX Collaboration
dc.date.accessioned2016-06-13T05:23:58Z
dc.date.available2016-06-13T05:23:58Z
dc.date.issued2016
dc.identifier.citationPHENIX Collaboration. (2016). Measurement of parity-violating spin asymmetries in W± production at midrapidity in longitudinally polarized p+p collisions. <i>Physical Review D</i>, <i>93</i>(5), Article 051103(R). <a href="https://doi.org/10.1103/PhysRevD.93.051103" target="_blank">https://doi.org/10.1103/PhysRevD.93.051103</a>
dc.identifier.otherCONVID_25666125
dc.identifier.otherTUTKAID_69821
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50268
dc.description.abstractWe present midrapidity measurements from the PHENIX experiment of large parity-violating singlespin asymmetries of high transverse momentum electrons and positrons from W =Z decays, produced in longitudinally polarized p þ p collisions at center of mass energies of ffiffi s p ¼ 500 and 510 GeV. These asymmetries allow direct access to the antiquark polarized parton distribution functions due to the parityviolating nature of the W-boson coupling to quarks and antiquarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb−1, which exceeds previous PHENIX published results by a factor of more than 27. These high Q2 data probe the parton structure of the proton at W mass scale and provide an important addition to our understanding of the antiquark parton helicity distribution functions at an intermediate Bjorken x value of roughly MW= ffiffi s p ¼ 0.16.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review D
dc.subject.otherp+p collisions
dc.subject.otherweak bosons
dc.subject.otherW bosons
dc.subject.otherspin asymmetry
dc.subject.otherparity violation
dc.titleMeasurement of parity-violating spin asymmetries in W± production at midrapidity in longitudinally polarized p+p collisions
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201606093008
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-06-09T15:15:12Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn1550-7998
dc.relation.numberinseries5
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.93.051103


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