Abstract
We report new STAR measurements of the single-spin asymmetries for and bosons produced in polarized proton-proton collisions at as a function of the decay-positron and decay-electron pseudorapidity. The data were obtained in 2013 and correspond to an integrated luminosity of . The results are combined with previous results obtained with . A comparison with theoretical expectations based on polarized lepton-nucleon deep-inelastic scattering and prior polarized proton-proton data suggests a difference between the and quark helicity distributions for . In addition, we report new results for the double-spin asymmetries for , as well as for production and subsequent decay into electron-positron pairs.
- Received 12 December 2018
DOI:https://doi.org/10.1103/PhysRevD.99.051102
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Published 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, and DOI. Funded by SCOAP3.
Published by the American Physical Society