High Energy Physics - Phenomenology
[Submitted on 11 Mar 2015]
Title:Achievements and open issues in the determination of polarized parton distribution functions
View PDFAbstract:I review the current status of the determination of helicity-dependent, or polarized, parton distribution functions from a comprehensive analysis of experimental data in perturbative quantum chromodynamics. I illustrate the latest achievements driven by new measurements in polarized proton-proton collisions at the Relativistic Heavy Ion Collider, namely the first evidence of a sizable polarized light sea quark asymmetry and of a positive polarized gluon distribution in the proton. I discuss which are the open issues in the determination of polarized distributions, and how these may be addressed in the future by ongoing, planned and proposed experimental programs.
Submission history
From: Emanuele Roberto Nocera [view email][v1] Wed, 11 Mar 2015 22:09:52 UTC (87 KB)
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