Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at √s=510 GeV
We report new STAR measurements of the single-spin asymmetries AL for W+ and W− bosons produced in polarized proton-proton collisions at √s=510 GeV as a function of the decay-positron and decay-electron pseudorapidity. The data were obtained in 2013 and correspond to an integrated luminosity of 250...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
14 March 2019
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| In: |
Physical review
Year: 2019, Jahrgang: 99, Heft: 5 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.99.051102 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1103/PhysRevD.99.051102 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.99.051102 
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| Verfasserangaben: | J. Adam, I.M. Deppner, N. Herrmann [und 351 weitere] (STAR Collaboration) |
MARC
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| 520 | |a We report new STAR measurements of the single-spin asymmetries AL for W+ and W− bosons produced in polarized proton-proton collisions at √s=510 GeV as a function of the decay-positron and decay-electron pseudorapidity. The data were obtained in 2013 and correspond to an integrated luminosity of 250 pb−1. The results are combined with previous results obtained with 86 pb−1. A comparison with theoretical expectations based on polarized lepton-nucleon deep-inelastic scattering and prior polarized proton-proton data suggests a difference between the ¯u and ¯d quark helicity distributions for 0.05<x<0.25. In addition, we report new results for the double-spin asymmetries ALL for W±, as well as AL for Z/γ∗ production and subsequent decay into electron-positron pairs. | ||
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