Paper Page - Longitudinal double-spin asymmetry for inclusive jet and dijet production at 200 GeV (2015 dataset)
Title: Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at √s = 200 GeV
PAs: Nick Lukow, Ernst Sichtermann, Bernd Surrow, Maria Żurek
Target Journal: Physical Review D Letters
Published in: https://doi.org/10.1103/PhysRevD.103.L091103
Draft:
- Version 1.0 - 09/14/2020
- Version 1.1 - 10/19/2020
- Version 1.2 - 11/05/2020
- Version 1.3 - 11/14/2020
- Version 1.4 - 12/14/2020 (version with marked changes)
- Version 1.5 - 01/05/2021 (version with marked changes)
- Version 1.6 - 01/12/2021 w/ author list and acknowledgments (sent to the collaboration)
- Version 1.7 - 01/19/2021 author list updated
- Version 1.8 - 02/04/2021 (version with marked changes)
- Version 1.9 - 02/12/2021 (version with marked changes w.r.t. v1.8 and w.r.t. v1.7)
- Version 2.0 - 02/25/2021 (version with marked changes)
- Version 2.1 + Supplemental Material - 04/19/2021 (version with marked changes)
Responses to comments
- Comments to Version 1.0 with responses - 10/19/2020
- Comments to Version 1.1 with responses - 11/05/2020
- Comments to Version 1.2 with responses - 11/14/2020
- Comments to Version 1.3 with responses - 12/14/2020
- Comments to Version 1.4 with responses - 01/05/2021
- Comments to version 1.6 with responses - 02/12/2021
- Comments to version 1.9 with responses - 02/25/2021
- Comments to version 2.0 from reviewers with responses - 04/19/2021
Documentation:
PWG Presentations:
Analysis Code: https://www.star.bnl.gov/cgi-bin/protected/viewvc.cgi/cvsroot/offline/paper/psn0756/
Abstract:
We report high-precision measurements of the longitudinal double-spin asymmetries, ALL, for midrapidity inclusive jet and dijet production in polarized pp collisions at a center-of-mass energy of √s = 200 GeV. The new inclusive jet data are sensitive to the gluon helicity distribution ∆g(x,Q2) for gluon momentum fractions in the range from x≃0.05 to x≃0.5, while the new dijet data provide further constraints on the x-dependence of ∆g(x,Q2). The results are in good agreement with previous measurements at √s = 200 GeV and with recent theoretical evaluations of prior world data. Our new results have better precision and thus strengthen the evidence that ∆g(x,Q2) is positive for x>0.05.
Plots:
Tables:
Conclusions:
In summary, we have presented ALL for midrapidity inclusive jet and dijet production based on data recorded by the STAR collaboration during RHIC operations with polarized proton beams at √s=200 GeV in 2015. The data provide sensitivity to the polarized gluon distribution ∆g(x,Q2) for gluon momentum fractions 0.05≲x≲0.5. Our new results are consistent with and have better precision than our previous data at √s=200 GeV. The results provide further evidence that ∆g(x,Q2) is positive for x>0.05.
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