BNL Nuclear Physics Seminar

Date: 06/23/2020

Title: Longitudinal double-spin asymmetries for inclusive jets produced in √s = 200 GeV proton-proton collisions at STAR

Abstract: STAR measures double-spin asymmetries ALL in longitudinally polarized proton-proton collisions to determine the gluon helicity distribution ∆G(x,Q2). Previously published inclusive jet results based on s = 200 GeV data collected in 2009 provided first evidence for positive gluon polarization for a momentum fraction x > 0.05 at a hard perturbative scale Q2 = 10 GeV2. This talk will present new preliminary results from 2015 data with an approximately twice larger figure of merit and correspondingly better precision.

Slides: 200623SeminarBNL-v3.pdf