First Measurement Of The Jet Cross Section In Polarized p+p Collisions At $\sqrt{s}=200 $ GeV

TL;DR

This paper reports the first measurement of the inclusive jet cross section in polarized proton-proton collisions at 200 GeV, demonstrating agreement with theoretical predictions and establishing a foundation for future high-statistics analyses.

Contribution

It provides the first experimental measurement of jet cross sections in polarized p+p collisions at this energy, validating NLO pQCD calculations in this context.

Findings

Jet cross section measured over 5-50 GeV/c range

Results agree with NLO pQCD predictions

Methodology sets stage for higher-statistics studies

Abstract

We present preliminary measurements of the inclusive jet cross section in the transverse momentum region 5<$p_{T}$<50 GeV/\textit{c} from 0.2 $pb^{-1}$ of polarized p+p data at $\sqrt{s}$=200 GeV. The data were corrected for detector inefficiency and resolution using PYTHIA events processed through a full GEANT simulation. The measured jet cross section agrees well with NLO pQCD calculations over seven orders of magnitude. These "proof of principal" measurements pave the way for ongoing analyses of the higher statistics ($\sim$ 3 $pb^{-1}$) data sample from the 2005 RHIC run.