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arXiv 1012.4840hep-ph
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类属MSSM中的有效Higgs顶点

Effective Higgs Vertices in the generic MSSM

Andreas Crivellin

摘要:

在这篇文章中,我们考虑在最一般的MSSM的手征增强的修改希格斯顶点。我们包括来自双线性项的贡献,从三线性A项和它们的非全纯类似物,A '项,耦合方的“错误的”希格斯场。我们执行一个一致的重整化的希格斯顶点超出解耦限制M_SUSY->无穷大,使用一个纯粹的图解方法。取消不同的贡献和超越的去耦限制进行了讨论和可能发生的去耦效应的大小,如果超对称粒子是不是比电弱尺度重得多的检查。在解耦极限下,我们恢复了有效场论方法得到的结果。对于非全纯A '项,我们发现下扇区中众所周知的$\tanβ$增强与与μ成比例的项类似。由于这些三线性项的先验通用风味结构,可以诱导大的风味变化中性希格斯耦合。我们还发现了新的tan(β)增强的贡献,涉及通常的全纯A-条款,这是以前没有讨论过的文献。这些修正只发生在对希格斯耦合的味对角非全纯修正存在的情况下。这反映了这样一个事实,即A项以及手征变化的自能是物理量,不能被吸收到重整化常数中。

英文摘要:

In this article we consider chirally enhanced corrections to Higgs vertices in the most general MSSM. We include the contributions stemming from bilinear-terms, from the trilinear A-terms and their non-holomorphic analogues, the A'-terms, which couple squarks to the "wrong" Higgs field. We perform a consistent renormalization of the Higgs vertices beyond the decoupling limit M_SUSY->infinity, using a purely diagrammatic approach. The cancellation of the different contributions in and beyond the decoupling limit is discussed and the possible size of decoupling effects which occur if the SUSY particles are not much heavier than the electroweak-scale are examined. In the decoupling limit we recover the results obtained in the effective-field-theory approach. For the non-holomorphic A'-terms we find the well known $\tanβ$ enhancement in the down-sector similar to the one for terms proportional to mu. Due to the a priori generic flavor structure of these trilinear terms large flavour-changing neutral Higgs couplings can be induced. We also discover new tan(beta) enhanced contributions involving the usual holomorphic A-terms, which were not discussed before in the literature. These corrections occur only if also flavor-diagonal non-holomorphic corrections to the Higgs couplings are present. This reflects the fact that the A-terms, and also the chirality-changing self-energies, are physical quantities and cannot be absorbed into renormalization constants.

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