Extracting the Gluon Piece of the Spin Puzzle: New Inclusive Jet Results from STAR

TL;DR

This paper reports new inclusive jet measurements from polarized proton collisions at RHIC, providing important constraints on the gluon helicity distribution to better understand the proton spin structure.

Contribution

It presents the most recent inclusive jet asymmetry results with increased precision and transverse momentum range, improving constraints on gluon polarization.

Findings

Inclusive jet asymmetry measurements constrain gluon helicity.

Results are consistent with existing QCD evaluations.

Enhanced data precision advances understanding of proton spin contributions.

Abstract

This contribution presents the most recent mid-rapidity inclusive jet results from 3 pb^-1 of data collected from longitudinally polarized proton collisions at sqrt(s)=200 GeV during the 2005 RHIC run. The inclusive jet asymmetry, a_LL, with it's increased transverse momentum range and precision, provides strong constraints on the gluon helicity distribution when compared with existing next-to-leading order perturbative QCD evaluations.