arXiv 1409.39832014-09-13hep-ph

单圈电弱手征拉格朗日量和$γγ\to Z_L Z_L,\, W_L^+ W_L^-$

Electroweak Chiral Lagrangians and $γγ\to Z_L Z_L,\, W_L^+ W_L^-$ at One Loop

R. L. Delgado, A. Dobado, M. J. Herrero, J. J. Sanz-Cillero

备注：: 6 pages. Proceedings of the Second Annual Conference on Large Hadron Collider Physics - LCHP 2014, Columbia University, New York, U.S.A (June 2-7, 2014)

摘要：

在这些程序中，我们讨论了我们最近的工作$γγ\to W^+_L W^-_L$和$γγ\to Z_L Z_L$的框架内的电弱手征拉格朗日与轻希格斯粒子。这些观测量是提供标准模型之外的物理指示的良好候选者，并且可以补充其他分析和全局拟合。利用等价定理，我们已经进行了计算，直到手征展开中的次前导阶，即，包括单回路校正和在低能有效场论中在该阶允许的可能的反项的完整集合。结果表明，单圈振幅具有非常简单的结构，并且是紫外有限的。因此，高阶手性偶联$c_γ^r$和$(a_1^r-a_2^r+a_3^r)$的相关组合不运行。我们还确定了一组额外的可观的，取决于这些相同的参数，它可以用来补充$γγ$分析通过一个全球性的适合。

英文摘要：

In these proceedings we discuss our recent work on $γγ\to W^+_L W^-_L$ and $γγ\to Z_L Z_L$ within the framework of Electroweak Chiral Lagrangians with a light Higgs. These observables are good candidates to provide indications of physics beyond the Standard Model and can complement other analyses and global fits. Making use of the equivalence theorem, we have performed the computation up to the next-to-leading order in the chiral expansion, i.e., including one-loop corrections and the full set of possible counterterms allowed at that order in the low-energy effective field theory. The one-loop amplitudes turn out to have a extremely simple structure and they are ultraviolet finite. Thus, the relevant combinations of higher order chiral couplings $c_γ^r$ and $(a_1^r-a_2^r+a_3^r)$ do not run. We also identify an additional set of observables that depend on these same parameters, which can be use to complement the $γγ$ analysis through a global fit.

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。

摘要：

英文摘要：

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