Recent results in high-energy longitudinal polarized proton-proton collisions at 200GeV at RHIC

TL;DR

This paper reports recent measurements of the longitudinal double-spin asymmetry in polarized proton-proton collisions at 200 GeV, providing new insights into the polarized gluon distribution function g(x) within a specific x range.

Contribution

It presents new experimental results that constrain the polarized gluon distribution function g(x) in proton collisions at RHIC, emphasizing the importance of probing small x regions.

Findings

New constraints on g(x) in the x range 0.02 to 0.3

Results highlight the significance of small x in polarized gluon studies

Data from STAR and PHENIX experiments support ongoing gluon polarization research.

Abstract

We report on recent results of the longitudinal double-spin asymmetry A_LL from the STAR and PHENIX experiments. Data were collected in longitudinally polarized proton-proton collisions at a center-of-mass energy of 200 GeV. The results added new constraints to the polarized gluon distribution function g(x) with the probed x range of 0:02 < x < 0:3. The results lead to the importance of probing small x.