2016/08/03 by Ramachandran, Suvarna
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.1608.01332
openalex publication_date 2016/08/03 · openalex created_date 2022/10/04 · openalex updated_date 2026/07/28
The production of jets in polarized proton collisions at STAR is dominated by\nquark-gluon and gluon-gluon scattering processes. The dijet longitudinal\ndouble-spin asymmetry (ALL) is sensitive to the helicity distributions and\nmay be used to extract information about the gluon helicity contribution\n\Δg(x,Q2) to the spin of the proton. Previous STAR jet measurements at\n\√ s = 200 GeV show evidence of polarized gluons for gluon momentum\nfractions above 0.05. The measurement of dijet ALL at \√ s = 510 GeV\nwill extend the current constraints on \Δg(x,Q2) to lower gluon\nmomentum fractions and allow for the reconstruction of the partonic kinematics\nat leading order. These proceedings present preliminary results from the dijet\nALL measurement from \∼50 pb-1 of \∼50 % polarized proton data\ntaken during the 2012 RHIC run.\n