Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at $\sqrt{s}=500\text{ }\text{ }\mathrm{GeV}$

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dc.citation.articleNumber032004 en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitlePhysical Review Den_US
dc.citation.volumeNumber97en_US
dc.contributor.authorSTAR Collaborationen_US
dc.date.accessioned2019-01-03T16:59:04Zen_US
dc.date.available2019-01-03T16:59:04Zen_US
dc.date.issued2018en_US
dc.description.abstractWe report the first measurements of transverse single-spin asymmetries for inclusive jet and jet+π± production at midrapidity from transversely polarized proton-proton collisions at √s=500 GeV. The data were collected in 2011 with the STAR detector sampled from 23 pb−1 integrated luminosity with an average beam polarization of 53%. Asymmetries are reported for jets with transverse momenta 6<pT<55 GeV/c and pseudorapidity |η|<1. Presented are measurements of the inclusive-jet azimuthal transverse single-spin asymmetry, sensitive to twist-3 initial-state quark-gluon correlators; the Collins asymmetry, sensitive to quark transversity coupled to the polarized Collins fragmentation function; and the first measurement of the “Collins-like” asymmetry, sensitive to linearly polarized gluons. Within the present statistical precision, inclusive-jet and Collins-like asymmetries are small, with the latter allowing the first experimental constraints on gluon linear polarization in a polarized proton. At higher values of jet transverse momenta, we observe the first nonzero Collins asymmetries in polarized-proton collisions, with a statistical significance of greater than 5σ. The results span a range of x similar to results from semi-inclusive deep-inelastic scattering but at much higher Q2. The Collins results enable tests of universality and factorization breaking in the transverse momentum-dependent formulation of perturbative quantum chromodynamics.en_US
dc.identifier.citationSTAR Collaboration. "Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at $\sqrt{s}=500\text{ }\text{ }\mathrm{GeV}$." <i>Physical Review D,</i> 97, no. 3 (2018) American Physical Society: https://doi.org/10.1103/PhysRevD.97.032004.en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.97.032004en_US
dc.identifier.urihttps://hdl.handle.net/1911/104953en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, anden_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleAzimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at $\sqrt{s}=500\text{ }\text{ }\mathrm{GeV}$en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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