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arXiv 1012.1173hep-ex
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在\sqrt{s} =200 GeV at STAR的极化质子-质子碰撞中的双喷射截面和纵向双自旋不对称性测量

Dijet Cross Section and Longitudinal Double Spin Asymmetry Measurements in Polarized Proton-proton Collisions at \sqrt{s}=200 GeV at STAR

Tai Sakuma, Matthew Walker, the STAR Collaboration

摘要:

本文给出了在\sqrt{s} = 200 GeV、中快度|eta| < 0.8时极化质子-质子碰撞中双喷流截面和双喷流纵向双自旋不对称性A_LL的初步结果。在RHIC运行-6期间收集的5.39 pb^{-1}的积分亮度用于测量。初步结果作为双喷流不变质量M_jj的函数。双射截面与次-首阶pQCD预言一致。的A_LL进行了比较与理论预测的基础上的各种参数化的极化部分子分布的质子。显示了运行9至今分析数据的预计精密度。

英文摘要:

These proceedings show the preliminary results of the dijet cross sections and the dijet longitudinal double spin asymmetries A_LL in polarized proton-proton collisions at \sqrt{s} = 200 GeV at the mid-rapidity |eta| < 0.8. The integrated luminosity of 5.39 pb^{-1} collected during RHIC Run-6 was used in the measurements. The preliminary results are presented as functions of the dijet invariant mass M_jj. The dijet cross sections are in agreement with next-to-leading-order pQCD predictions. The A_LL is compared with theoretical predictions based on various parameterizations of polarized parton distributions of the proton. Projected precision of data analyzed to date from Run-9 are shown.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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