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arXiv 1208.1209hep-thhep-ph
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QCD弦的散射振幅

Scattering Amplitudes of QCD String

Yuri Makeenko

摘要:

本文回顾了在Regge区域中,应用长弦有效理论推导大N介子散射振幅的方法。特别注意的是重新参数化路径积分,它起着至关重要的作用,离壳振幅的一致性。我展示了如何在平均场近似下得到QCD弦的线性Reggeon轨线,这对Nambu-Goto弦是精确的,并讨论了与微扰QCD的相互关系。

英文摘要:

I review the derivation of large-N QCD meson scattering amplitudes in the Regge regime, where the effective theory of long strings applies in d=4. A special attention is payed to the reparametrization path integral which plays a crucial role in the consistency of off-shell amplitudes. I show how the linear Reggeon trajectory is obtained for QCD string in the mean-field approximation, which turns out to be exact for the Nambu-Goto string, and discuss the interrelation with perturbative QCD.

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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