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arXiv 0710.0575hep-ex
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LEP的强子光子-光子散射

Hadronic photon-photon scattering at LEP

Thorsten Wengler

摘要:

在LEP 1和LEP 2数据采集期间,两个准实光子的强子相互作用已经得到了广泛的研究。在LEP 2的更高的能量,特别是相空间的开放区域,强子过程可以可靠地预测微扰QCD计算,通常可用于次领先的强耦合常数的过程有关的顺序。在广泛的可观测量和相空间之间的测量和理论之间观察到良好的协议,但是,也有一些例外。L3合作发现理论和实验之间的高动量粒子和喷流产生存在很大差异,DELPHI,L3和OPAL对开b夸克产生的测量一直超过理论值。三个新的测量,现在已经成为可用的,并将在本文中讨论:喷流和强子生产的OPAL和开放美丽的生产ALEPH。

英文摘要:

Hadronic interactions of two quasi-real photons have been studied extensively both during the LEP1 and the LEP2 data taking periods. The higher energies available at LEP2 in particular opened regions of phase space where hadronic processes can be predicted reliably by perturbative QCD calculations, usually available to next-to-leading order in the strong coupling constant for the process concerned. Over a wide range of observables and phase space good agreement is observed between measurements and theory, however, there are a few exceptions. The L3 collaboration has found large discrepancies for high momentum particle and jet production between theory and experiment, and measurements of open b-quark production by DELPHI, L3, and OPAL are consistently in excess of the theoretical values. Three new measurements have now become available and will be discussed in this paper: on jet and hadron production by OPAL and open beauty production by ALEPH.

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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