Recent results in high-energy longitudinal polarized proton-proton collisions at 200GeV at RHIC
Abstract
We report on recent results of the longitudinal double-spin asymmetry ALL 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.
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