nhancement of Higgs to diphoton decay width in non-perturbative Higgs mode
nhancement of Higgs to diphoton decay width in non-perturbative Higgs mode
复制标题
非微扰希格斯模式下希格斯对双光子衰变宽度的增强
DOI：
10.1016/j.physletb.2012.12.049
复制
发表时间：
2013
影响因子：
4.4
通讯作者：
R. Takahashi
中科院分区：
文献类型：
--
作者：
N. Haba;K. Kaneta;Y. Mimura;R. Takahashi
研究了在超对称模型中通过Higgsino环图来增加Higgs到双光子衰变宽度的可能性。首先分析了一个附加了Higgs场的不可重整化项的模型，其中高阶项可以引入Higgs耦合到Higgsinos和带电Higgs玻色子。我们指出，希格斯耦合的选择，以获得一个显着的大小的增强双光子衰变宽度减少希格斯质量和/或大小的非重整化项需要是大的和截止尺度是围绕弱规模。另一个模型中的Higgsino质量项产生的非微扰瞬子效应通过强动力学在超对称QCD的背景下。结果表明，由于分母中含有玻色子场的算符，Higgs与费米子耦合的符号与微扰模型相反，并且在这种模型中可以容易地得到对双光子衰变振幅的建设性贡献.
We investigate a possibility if a loop diagram via Higgsino can enhance the Higgs to diphoton decay width in supersymmetric models with an extension of Higgs sector. A model with an additional non-renormalizable term of Higgs fields is firstly analyzed where the higher order term can introduce the Higgs coupling to Higgsinos as well as charged Higgs bosons. We point out that a choice of the Higgs coupling to obtain a significant size of enhancement of diphoton decay width reduces the Higgs mass and/or a size of non-renormalizable term needs to be large and a cutoff scale is around the weak scale. Another model in which the Higgsino mass term is generated by a non-perturbative instanton effect via a strong dynamics in a context of SUSY QCD is also suggested. It is shown that the sign of the Higgs coupling to fermions is opposite from perturbative models due to an operator including bosonic fields in the denominator and a constructive contribution to the diphoton decay amplitude can be easily obtained in this kind of model.