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arXiv 0707.0877hep-ph
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未来对撞机上具有T宇称的最小希格斯模型中额外规范玻色子的签名

Signatures of Extra Gauge Bosons in the Littlest Higgs Model with T-parity at Future Colliders

Qing-Hong Cao, Chuan-Ren Chen

摘要:

本文研究了在大型强子对撞机(LHC)和线性对撞机(LC)上T宇称最小希格斯模型(LHT)中T奇规范玻色子$W_{H}$对产生的对撞机特征。在大型强子对撞机上,我们使用它的轻子衰变,即$pp\to W_{H}^{+}W_{H}^{-}\to A_{H}A_{H}\ell^{+}ν_{\ell}\ell^{\prime-}\barν_{\ell^{\prime}}$,寻找$W_{H}$玻色子,它产生了$\ell^{+}\ell^{\prime-}+\met$的对撞机签名。我们证明了LHC不仅具有发现该通道中$W_{H}$玻色子的巨大潜力,而且可以探测LHT的巨大参数空间。由于在最终状态下丢失了四个粒子,人们无法在大型强子对撞机上重建$W_{H}$的质量。但是这样的质量测量可以在$e^{+}e^{-}\to W_{H}^{+}W_{H}^{-}\to A_{H}A_{H}W^{+}W^{-}\to A_{H}A_{H}jjjj$过程中的LC处容易地实现。提出了一种在LC上测量$W_{H}$玻色子质量和自旋的算法。此外,我们还说明了$W$玻色子与其母粒子($W_{H}$)之间的自旋关联可以用来区分LHT与其他新物理模型。

英文摘要:

We study the collider signatures of a T-odd gauge boson $W_{H}$ pair production in the Littlest Higgs Model with T-parity (LHT) at Large Hadron Collider (LHC) and Linear Collider (LC). At the LHC, we search for the $W_{H}$ boson using its leptonic decay, i.e. $pp\to W_{H}^{+}W_{H}^{-}\to A_{H}A_{H}\ell^{+}ν_{\ell}\ell^{\prime-}\barν_{\ell^{\prime}}$, which gives rise to a collider signature of $\ell^{+}\ell^{\prime-}+\met$. We demonstrate that the LHC not only has a great potential of discovering the $W_{H}$ boson in this channel, but also can probe enormous parameter space of the LHT. Due to four missing particles in the final state, one cannot reconstruct the mass of $W_{H}$ at the LHC. But such a mass measurement can be easily achieved at the LC in the process of $e^{+}e^{-}\to W_{H}^{+}W_{H}^{-}\to A_{H}A_{H}W^{+}W^{-}\to A_{H}A_{H}jjjj$. We present an algorithm of measuring the mass and spin of the $W_{H}$ boson at the LC. Furthermore, we illustrate that the spin correlation between the $W$ boson and its mother particle ($W_{H}$) can be used to distinguish the LHT from other new physics models.

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。

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