Two-Loop Electroweak Logarithms in Four-Fermion Processes at High Energy
Two-Loop Electroweak Logarithms in Four-Fermion Processes at High Energy
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DOI：
10.1016/j.nuclphysb.2005.10.010
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发表时间：
2005-09
期刊：
影响因子：
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通讯作者：
B. Jantzen;J. Kuhn;A. Penin;V. Smirnov
中科院分区：
文献类型：
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作者：
B. Jantzen;J. Kuhn;A. Penin;V. Smirnov
我们提出了在自发破断 SU(2) 规范模型中对向量形状因子和四费米子截面的高能渐近行为的二环对数增强贡献的完整分析结果。在此结果的基础上，我们得出了对高能中性电流四费米子过程的主要二环电弱校正。之前被忽视的规范玻色子质量差的影响通过次对数近似包含在内。
We present the complete analytical result for the two-loop logarithmically enhanced contributions to the high energy asymptotic behavior of the vector form factor and the four-fermion cross section in a spontaneously broken SU(2) gauge model. On the basis of this result we derive the dominant two-loop electroweak corrections to the neutral current four-fermion processes at high energies. Previously neglected effects of the gauge boson mass difference are included through the next-to-next-to-leading logarithmic approximation.