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arXiv 1006.4045hep-phhep-ex
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强子碰撞中大pT强子产生的高扭曲贡献

Higher-twist contributions to large pT hadron production in hadronic collisions

Francois Arleo, Stanley J. Brodsky, Dae Sung Hwang, Anne M. Sickles

摘要:

研究了强子碰撞中大pT强子产生的标度行为。与NLO QCD的预言有很大的偏差,特别是在xT = 2pT/sqrt(s)的高值下。与此相反,提示光子和喷气生产数据证明与领先扭转的预期。这些结果被解释为来自高扭曲过程的不可忽视的贡献,其中强子直接在硬子过程中产生。在RHIC标度指数的预测成功地比较PHENIX初步测量。我们建议触发孤立的大pT强子的生产,以提高更高的扭曲过程,并指出,使用孤立的强子作为一个信号,新的物理在对撞机可以受到直接强子生产过程的存在。

英文摘要:

The scaling behavior of large-pT hadron production in hadronic collisions is investigated. A significant deviation from the NLO QCD predictions is reported, especially at high values of xT=2pT/sqrt(s). In contrast, the prompt photon and jet production data prove in agreement with leading-twist expectations. These results are interpreted as coming from a non-negligible contribution of higher-twist processes, where the hadron is produced directly in the hard subprocess. Predictions for scaling exponents at RHIC are successfully compared to PHENIX preliminary measurements. We suggest to trigger on isolated large-pT hadron production to enhance higher-twist processes, and point that the use of isolated hadrons as a signal for new physics at colliders can be affected by the presence of direct hadron production processes.

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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