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arXiv 1802.02524hep-thhep-ph
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软反常维数的次引导Regge极限

Subleading Regge limit from a soft anomalous dimension

Robin Brüser, Simon Caron-Huot, Johannes M. Henn

摘要:

威尔逊线捕捉散射振幅的重要特征,例如与红外发散相关的软效应和Regge极限。除了超前幂近似外,还必须考虑程函图像的修正。在本文中,我们研究了在N = 4的超级杨米尔斯的大质量散射振幅模型中的这种修正,在平面极限,其中的质量是通过希格斯机制产生的。利用已知的散射振幅的三环解析表达式,我们发现第一次幂抑制项具有非常简单的形式,等于一个单一的幂律。我们建议,它的指数是由一个威尔逊圈与标量插入在尖点的异常尺寸,我们提供了微扰的证据。我们还分析了振幅的其他限制,并推测了高能量下总截面的精确公式。

英文摘要:

Wilson lines capture important features of scattering amplitudes, for example soft effects relevant for infrared divergences, and the Regge limit. Beyond the leading power approximation, corrections to the eikonal picture have to be taken into account. In this paper, we study such corrections in a model of massive scattering amplitudes in N = 4 super Yang-Mills, in the planar limit, where the mass is generated through a Higgs mechanism. Using known three-loop analytic expressions for the scattering amplitude, we find that the first power suppressed term has a very simple form, equal to a single power law. We propose that its exponent is governed by the anomalous dimension of a Wilson loop with a scalar inserted at the cusp, and we provide perturbative evidence for this proposal. We also analyze other limits of the amplitude and conjecture an exact formula for a total cross-section at high energies.

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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