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01783 am a22002773u 4500 |
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91224 |
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|a Balewski, Jan T.
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|a Massachusetts Institute of Technology. Laboratory for Nuclear Science
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|a Balewski, Jan T.
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|a Stevens, Justin
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|a van Nieuwenhuizen, Gerrit Jan
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|a Stevens, Justin
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|a van Nieuwenhuizen, Gerrit Jan
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|a Measurement of Longitudinal Spin Asymmetries for Weak Boson Production in Polarized Proton-Proton Collisions at RHIC
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|b American Physical Society,
|c 2014-10-29T16:18:58Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/91224
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|a We report measurements of single- and double-spin asymmetries for W[superscript ±] and Z/γ[superscript ∗] boson production in longitudinally polarized p + p collisions at √s = 510 GeV by the STAR experiment at RHIC. The asymmetries for W[superscript ±] were measured as a function of the decay lepton pseudorapidity, which provides a theoretically clean probe of the proton's polarized quark distributions at the scale of the W mass. The results are compared to theoretical predictions, constrained by polarized deep inelastic scattering measurements, and show a preference for a sizable, positive up antiquark polarization in the range 0.05 < x < 0.2.
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|a Brookhaven National Laboratory
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|a Lawrence Berkeley National Laboratory
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|a United States. Dept. of Energy. Office of Nuclear Physics
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|a United States. Dept. of Energy. Office of High Energy Physics
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|a National Science Foundation (U.S.)
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|a en_US
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|a Article
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|t Physical Review Letters
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