Constraints on Delta G through Longitudinal Double Spin Asymmetry Measurements of Inclusive Jet Production in Polarized p+p Collisions at 200 GeV

TL;DR

This paper reports measurements of double spin asymmetry in inclusive jet production in polarized proton collisions at 200 GeV, providing new constraints on the polarized gluon distribution and presenting the first transverse single-spin asymmetry measurement at mid-rapidity.

Contribution

It presents the first measurements of both longitudinal double spin and transverse single-spin asymmetries for inclusive jets at RHIC, constraining gluon polarization in the proton.

Findings

Constraints on polarized gluon distribution over 0.02 < x < 0.3

First measurement of transverse single-spin asymmetry at mid-rapidity

Results improve understanding of proton spin structure

Abstract

We report measurements of the longitudinal double spin asymmetry for inclusive jet production using polarized p+p collisions at sqrt{s} = 200 GeV at RHIC. Results from the 2005 and 2006 runs are presented. These results set substantial new constraints on the polarized gluon distribution in the proton over the kinematic range 0.02 < x< 0.3, when compared to next-to-leading order global analyses of DIS data. The first measurement of the transverse single-spin asymmetry for inclusive jets at mid-rapidity is also presented.