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arXiv 0712.0396hep-ph
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用有效场论研究高能过程的电弱修正

Electroweak Corrections in High Energy Processes using Effective Field Theory

Jui-yu Chiu, Frank Golf, Randall Kelley, Aneesh V. Manohar

摘要:

我们用有效的理论方法对高能量下的电弱Sudakov谱进行了求和,其形式为α/(sin^2 θ_W)^n log^m s/ M_{Z,W} ^2。在标准模型中计算了涉及两个外部粒子的过程的修正。结果包括非零粒子的质量,如t-夸克质量,电弱混合效应,导致不平等的W和Z的质量,和辐射希格斯修正成比例的汤川耦合。我们表明,在尺度M_{W,Z}的匹配有一个项,最多线性对数/μ ^2的所有订单。有效的理论形式主义相比,并扩展,以前的工作的基础上红外演化方程。

英文摘要:

Electroweak Sudakov logarithms at high energy, of the form alpha/(sin^2theta_W)^n log^m s/M_{Z,W}^2, are summed using effective theory methods. The corrections are computed to processes involving two external particles in the standard model. The results include non-zero particle masses, such as the t-quark mass, electroweak mixing effects which lead to unequal W and Z masses, and radiative Higgs corrections proportional to the Yukawa couplings. We show that the matching at the scale M_{W,Z} has a term at most linear in log s/mu^2 to all orders. The effective theory formalism is compared with, and extends, previous work based on infrared evolution equations.

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