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arXiv 1012.5762hep-phhep-ex
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在LHC上R宇称违反非最小超对称模型中的异常希格斯玻色子信号

Unusual Higgs boson signal in R-parity violating nonminimal supersymmetric models at the LHC

Priyotosh Bandyopadhyay, Pradipta Ghosh, Sourov Roy

摘要:

在大型强子对撞机(LHC)上,我们预测了$R$ -宇称违反非最小超对称模型中希格斯玻色子的非常规背景自由信号。信号包括双轻子加上四个强子喷流和两个大的位移顶点。位移的轻子和喷流来自最轻的超对称粒子(LSP)的衰变,它主要是规范单态中微子。一对这样的LSP可以耦合到通过胶子融合产生的希格斯玻色子。我们分析了两种情况-一种对应于树级希格斯玻色子玻色子质量,另一种对应于希格斯玻色子玻色子的单圈校正质量。利用这个信号进行可靠的希格斯质量重建,可以在大型强子对撞机上发现具有质心能量$\sqrt{s}=14~\rm{TeV}$和5 fb积分亮度$(\mathcal{L})$的$^{-1}$。即使在$\sqrt{s}=7~\rm{TeV}$和$\mathcal{L}$ = 5 fb $^{-1}$时,也预期有合理数量的事件。此外,规范单重态LSP的质量重建可以提供一个估计的跷跷板规模。

英文摘要:

We predict an unconventional background free signal of the Higgs boson in $R$-parity violating nonminimal supersymmetric models at the Large Hadron Collider (LHC). The signal comprises dilepton plus four hadronic jets and two large displaced vertices. The displaced leptons and jets are coming from the decay of the lightest supersymmetric particle (LSP), which is predominantly a gauge-singlet neutrino. A pair of such LSPs can couple to a Higgs boson, created via gluon fusion. We have analyzed two cases - one corresponding to the tree-level Higgs boson mass and another with the one-loop corrected mass of the Higgs boson. A reliable Higgs mass reconstruction using this signal can lead to discovery at the LHC with center-of-mass energy $\sqrt{s}=14~\rm{TeV}$ and 5 fb$^{-1}$ of integrated luminosity $(\mathcal{L})$. Even at $\sqrt{s}=7~\rm{TeV}$ and $\mathcal{L}$ = 5 fb$^{-1}$, a reasonable number of events are expected. Besides, mass reconstruction of a gauge-singlet LSP can provide an estimate of the seesaw scale.

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