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arXiv 1006.4589hep-ph
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在ILC左右孪生Higgs模型中与$Z$玻色子相关的希格斯玻色子对的产生

Pair production of Higgs bosons associated with $Z$ boson in the left-right twin Higgs model at the ILC

Yao-Bei Liu, Xue-Lei Wang

摘要:

左右孪生希格斯(LRTH)模型预测了另外三个希格斯玻色子玻色子的存在:一个中性的希格斯$ϕ^{0}$和一对带电的希格斯玻色子玻色子$ϕ^{\pm}$。本文研究了在ILC中与标准模型规范玻色子$Z$相关联的一对带电中性希格斯玻色子玻色子的产生,即,$e^{+}e^{-}\rightarrow Zϕ^{+}ϕ^{-}$和$e^{+}e^{-}\rightarrow Zϕ^{0}ϕ^{0}$。计算了末态$Z$玻色子和带电Higgs玻色子$ϕ^{-}$的能量和横动量分布,带电希格斯玻色子对不变质量的微分截面,荷电希格斯玻色子玻色子对之间的夹角分布和$Z$ -玻色子和带电的希格斯玻色子$ϕ^{-}$。数值结果表明,对于工艺$e^{+}e^{-}\rightarrow Zϕ^{+}ϕ^{-}$,在合理的参数取值下,生产率处于$10^{-1} fb$的水平.对于$e^{+}e^{-}\rightarrow Zϕ^{0}ϕ^{0}$过程,我们发现在大多数参数空间中,其产生截面都小于$6\times 10^{-3} fb$。然而,共振产生横截面可以显著增强。

英文摘要:

The left-right twin Higgs(LRTH) model predicts the existence of three additional Higgs bosons: one neutral Higgs $ϕ^{0}$ and a pair of charged Higgs bosons $ϕ^{\pm}$. In this paper, we studied the production of a pair of charged and neutral Higgs bosons associated with standard model gauge boson $Z$ at the ILC, i.e., $e^{+}e^{-}\rightarrow Zϕ^{+}ϕ^{-}$ and $e^{+}e^{-}\rightarrow Zϕ^{0}ϕ^{0}$. We calculate the production rate and present the distributions of the various observables, such as, the distributions of the energy and the transverse momenta of final $Z$-boson and charged Higgs boson $ϕ^{-}$, the differential cross section of the invariant mass of charged Higgs bosons pair, the distribution of the angle between charged Higgs bosons pair and the production angle distributions of $Z$-boson and charged Higgs boson $ϕ^{-}$. Our numerical results show that, for the process $e^{+}e^{-}\rightarrow Zϕ^{+}ϕ^{-}$, the production rates are at the level of $10^{-1} fb$ with reasonable parameter values. For the process of $e^{+}e^{-}\rightarrow Zϕ^{0}ϕ^{0}$, we find that the production cross section are smaller than $6\times 10^{-3} fb$ in most of parameter space. However, the resonance production cross section can be significantly enhanced.

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