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arXiv 0911.2146hep-ph
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纵向极化强子-强子碰撞中重夸克关联的次领先级QCD修正

Next-to-Leading Order QCD Corrections to Heavy Quark Correlations in Longitudinally Polarized Hadron-Hadron Collisions

Johann Riedl, Andreas Schafer, Marco Stratmann

摘要:

本文对BNL-RHIC纵向极化质子-质子碰撞中的重味分布和关联进行了全面的唯象研究。所有结果都是用一个灵活的部分子级蒙特卡罗程序在次领先的顺序精度,并包括重介子的分裂,其随后的半轻子衰变,和实验削减。次至首阶的QCD修正对于截面和双自旋不对称性都是显著的。本文评估了BNL-RHIC重味测量对核子胶子极化的敏感性。电子-μ子和μ子-μ子相关性被证明是最有希望的观测量。理论的不确定性估计不同的重整化和因式分解尺度,重夸克质量,和碎裂参数。

英文摘要:

We present a comprehensive phenomenological study of heavy flavor distributions and correlations in longitudinally polarized proton-proton collisions at BNL-RHIC. All results are obtained with a flexible parton-level Monte Carlo program at next-to-leading order accuracy and include the fragmentation into heavy mesons, their subsequent semi-leptonic decays, and experimental cuts. Next-to-leading order QCD corrections are found to be significant for both cross sections and double-spin asymmetries. The sensitivity of heavy flavor measurements at BNL-RHIC to the gluon polarization of the nucleon is assessed. Electron-muon and muon-muon correlations turn out to be the most promising observables. Theoretical uncertainties are estimated by varying renormalization and factorization scales, heavy quark masses, and fragmentation parameters.

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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