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arXiv 0704.2628hep-phnucl-exnucl-th
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平均$p_t$作为高能QCD动力学探针

Average $p_t$ as a probe of high energy QCD dynamics

Jamal Jalilian-Marian

摘要:

本文提出用高能碰撞中产生的强子的平均横动量作为高密度(饱和)物理的诊断探针。通过在平均横动量的定义中引入和改变横动量截断,可以消除高能碰撞中主导级强子产生截面的整体大小的不确定性,并半定量地映射饱和物理所预测的不同动力学区域.我们讨论了这种方法在RHIC和LHC π介子产生中的应用,并对产生的π介子在适合RHIC和LHC实验的运动学中的平均横动量作了定量预测。

英文摘要:

Average transverse momentum of hadrons produced in high energy collisions is proposed as a diagnostic probe of high density (saturation) physics. We show that by introducing and varying a transverse momentum cutoff in the definition of the average transverse momentum, one can eliminate the uncertainty in the overall magnitude of the leading order hadron production cross section in high energy collisions, and semi-quantitatively map the different dynamical regions predicted by the saturation physics. We discuss the applications of this method to pion production at RHIC and LHC and make quantitative predictions for the average transverse momentum of produced pions in the kinematics appropriate for the RHIC and LHC experiments.

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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