Double Longitudinal Spin Asymmetry in Inclusive Jet Production in Polarized p+p Collisions at Sqrt(s) = 200 GeV

TL;DR

This paper reports measurements of the cross section and double longitudinal spin asymmetry in inclusive jet production in polarized proton-proton collisions at 200 GeV, providing insights into gluon polarization.

Contribution

It presents the first measurements of these asymmetries at this energy, comparing results with theoretical predictions and constraining gluon polarization models.

Findings

Cross section agrees with NLO pQCD calculations.

Spin asymmetries are consistent with existing DIS-based models.

Results disfavor large positive gluon polarization.

Abstract

We present preliminary measurements of the cross section and the double longitudinal spin asymmetry in inclusive jet production in polarized p+p collisions at Sqrt(s) = 200 GeV. The measured cross section agrees well with NLO pQCD calculations over seven orders of magnitude. The observed spin asymmetries are consistent with theoretical evaluations based on deeply inelastic scattering data and tend to disfavor a large positive gluon polarization.