论文标题
RHIC冷QCD的最新结果
Recent results on cold-QCD from RHIC
论文作者
论文摘要
相对论重离子对撞机（RHIC）的极化质子 - 蛋白碰撞提供了研究核子的自旋结构的独特机会。我们将重点介绍RHIC的恒星和苯金实验的核子自旋结构的最新结果：（1）质子中质子中相当大的Gluon极化是用喷射和强子产生的纵向双自旋不对称测量的； （2）W玻色子产生中的纵向单自旋不对称改善了对海夸克极化的限制。 W Boson的新自旋不对称结果证实了质子中光海夸克极化的SU（2）风味。 （3）HADRONIC系统中的横向自旋效应对共线和横向动量依赖性框架中的Parton分布功能产生了新的影响。我们还将在2021年以前的Star以前的几年来讨论Star Forward探测器升级和Proton-Proton和Proton-Ion Collisions的近期计划。
Polarized proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC) provide unique opportunities to study the spin structure of the nucleon. We will highlight recent results on the nucleon spin structure from the STAR and PHENIX experiments at RHIC: (1) A sizable gluon polarization in the proton is measured with longitudinal double spin asymmetries of jet and hadron production; (2) Longitudinal single spin asymmetries in W boson production improve constraints on the sea quark polarization. The new spin asymmetry results for W boson confirmed the SU(2) flavor asymmetry of the light sea quark polarization in the proton; (3) Transverse spin effects in hadronic systems offer new implications on parton distribution functions in the collinear and transverse momentum dependent frameworks. We will also discuss near term plans for the STAR forward detector upgrade and prospects for proton-proton and proton-ion collisions in the years beyond 2021 at STAR.
