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Measurements of Lambda and anti Lambda polarization in longitudinally polarized proton-proton collisions at Sqrt (nn) =200 GeV at Star

机译：在sqrt（nn）= 200 GeV处的星形极化质子 - 质子碰撞中的λ和反λ极化的测量

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Preliminary results for the longitudinal polarization of A and hyperons in longitudinally polarized proton-proton collisions at (radical)s = 200 GeV are presented. The (Lambda)((bar (Lambda))) candidates are reconstructed at mid-rapidity ((eta) < 1) with the time projection chamber of the STAR experiment at RHIC, using 0.5 pb(sup -1) collected in 2003 and 2004 with beam polarizations of up to 45%. Their mean longitudinal momentum fraction x(sub F) is about 8 x 10(sup -3) and their mean transverse momentum p(sub T) is about 1.5 GeV. The analysis uses asymmetries of counts for different spin states of the colliding proton beams and does not require detailed knowledge of the detector acceptance. The preliminary (Lambda)((Lambda)) polarization values are consistent with zero within their statistical uncertainties of 0.05.

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作者
Xu, Q.;
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年度 2005
页码 p.1-10
总页数 10
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Quantum mechanics; Physics; Elementary particles; Hyperons; Longitudinal momentum; Nuclei; Polarization; Proton beams; Spin; Stars; Time projection chambers; Transverse momentum;

机译：量子力学;物理学;基本粒子;超子;纵向动量;核;极化;质子束;自旋;恒星;时间投影室;横向动量;

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专利

1. Identified two-hadron correlations at STAR using Lambda, (Lambda)over-bar, and K-Short(0) triggers with charged hadrons in Au+Au collisions at root(NN)-N-S=200 GeV [J] . Gaillard L The European physical journal, C. Particles and fields . 2007,第1期

机译：使用Lambda，（Lambda）over-bar和K-Short（0）触发器在根（NN）-N-S = 200 GeV的Au + Au碰撞中使用带电强子在STAR处识别了两个强子相关性
2. Fluid dynamics study of the Lambda polarization for Au plus Au collisions at root S-NN=200 GeV [J] . Intelligence: A Multidisciplinary Journal . 2020,第期

机译：Root S-NN = 200 GEV的AU PLUS AU碰撞的Lambda极化的流体动力学研究
3. Global polarization of Lambda hyperons in Au plus Au collisions at root s(NN)=200 GeV [J] . Adam J., Adamczyk L., Adams J. R., Physical review, C . 2018,第1期

机译：在Root S（NN）= 200 GEV的AU PLUS AU碰撞中的Lambda超级化
4. Longitudinal Spin Transfer of Λ and ΛHyperons in Polarized Proton-Proton Collisions at = 200 GeV [C] . Ernst Sichtermann International Spin Physics Symposium . 2009

机译：λ和λ度突出的纵向旋转转移在偏光的质子 - 质子碰撞中= 200 gev
5. Longitudinal Spin Transfer to Lambda and Anti-Lambda Hyperons Produced in Polarized Proton-Proton Collisions at Center of Mass Energy = 200 GeV. [D] . Cendejas, Ramon. 2012

机译：在质量能中心= 200 GeV的极化质子-质子碰撞中产生的纵向自旋转移到Lambda和反Lambda超子。
6. Measurements of $\Lambda$ and $\bar \Lambda$ polarization in longitudinally polarized proton-proton collisions at $\sqrt s$ =200 GeV at STAR [O] . Xu, Qinghua, collaboration, for the STAR 2005

机译：测量$ \ Lambda $和$ \ bar \ Lambda $极化纵向极化质子 - 质子碰撞，$ \ sqrt s $ = 200 GeV at 星

Measurements of Lambda and anti Lambda polarization in longitudinally polarized proton-proton collisions at Sqrt (nn) =200 GeV at Star

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