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arXiv 0907.1234hep-ph
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强子碰撞中双强子产生的阈值恢复

Threshold Resummation for Di-hadron Production in Hadronic Collisions

Leandro G. Almeida, George Sterman, Werner Vogelsang

摘要:

本文研究了强子碰撞中双强子产生的部分子截面的大对数微扰修正的重新计算,H1 H2 -> h1 h2 X,在产生的强子对具有高不变质量时.这些修正出现在部分子反应的阈值附近,并与软胶子发射有关。我们执行的重申,以下一个领先的对数精度,并显示如何将一贯削减所观察到的粒子的速度和横向动量。我们给出了固定目标和ISR区域的数值结果,并发现了次领先阶截面的增强,这显着提高了理论预测与数据之间的一致性。

英文摘要:

We study the resummation of large logarithmic perturbative corrections to the partonic cross sections relevant for di-hadron production in hadronic collisions, H1 H2 -> h1 h2 X, at high invariant mass of the produced hadron pair. These corrections arise near the threshold for the partonic reaction and are associated with soft-gluon emission. We perform the resummation to next-to-leading logarithmic accuracy, and show how to incorporate consistently cuts in rapidity and transverse momentum of the observed particles. We present numerical results for fixed-target and ISR regimes and find enhancements over the next-to-leading order cross section, which significantly improve the agreement between theoretical predictions and data.

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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