Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p↑ + p collisions at s=500 GeV

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dc.citation.firstpage332en_US
dc.citation.journalTitlePhysics Letters Ben_US
dc.citation.lastpage339en_US
dc.citation.volumeNumber780en_US
dc.contributor.authorBrandenburg, J.D.en_US
dc.contributor.authorButterworth, J.en_US
dc.contributor.authorEppley, G.en_US
dc.contributor.authorGeurts, F.en_US
dc.contributor.authorRoberts, J.B.en_US
dc.contributor.authorTlusty, D.en_US
dc.date.accessioned2018-11-30T19:42:12Zen_US
dc.date.available2018-11-30T19:42:12Zen_US
dc.date.issued2018en_US
dc.description.abstractThe transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing semi-inclusive deep inelastic scattering (SIDIS) data. In transversely polarized p↑+p collisions it can be accessed using transverse polarization dependent fragmentation functions which give rise to azimuthal correlations between the polarization of the struck parton and the final state scalar mesons. This letter reports on spin dependent di-hadron correlations measured by the STAR experiment. The new dataset corresponds to 25 pb−1 integrated luminosity of p↑+p collisions at s=500 GeV, an increase of more than a factor of ten compared to our previous measurement at s=200 GeV. Non-zero asymmetries sensitive to transversity are observed at a Q2 of several hundred GeV and are found to be consistent with the former measurement and a model calculation. We expect that these data will enable an extraction of transversity with comparable precision to current SIDIS datasets but at much higher momentum transfers where subleading effects are suppressed.en_US
dc.identifier.citationBrandenburg, J.D., Butterworth, J., Eppley, G., et al.. "Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p↑ + p collisions at s=500 GeV." <i>Physics Letters B,</i> 780, (2018) Elsevier: 332-339. https://doi.org/10.1016/j.physletb.2018.02.069.en_US
dc.identifier.doihttps://doi.org/10.1016/j.physletb.2018.02.069en_US
dc.identifier.urihttps://hdl.handle.net/1911/103505en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordTransversityen_US
dc.subject.keywordDi-hadron correlationsen_US
dc.subject.keywordInterference fragmentation functionen_US
dc.titleTransverse spin-dependent azimuthal correlations of charged pion pairs measured in p↑ + p collisions at s=500 GeVen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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