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arXiv 1202.4937hep-phhep-ex
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在LHC的电荷-中性子生产中的希格斯信号

Higgs signal in Chargino-Neutralino production at the LHC

Diptimoy Ghosh, Monoranjan Guchait, Dipan Sengupta

摘要:

分析了在基于mSUGRA/CMSSM的超对称(SUSY)模型中,通过产生电荷中性伴子($\CH_1\N0_2$)在8 TeV和14 TeV LHC上探测希格斯粒子的前景.在通道中研究信号,其中$\ell + b \bar b + \PMET$遵循衰减,即$\CH_1 \to W^\pm \N0_1$、$\N0_2 \to \N0_1 h$和$h \to b \bar b$。在这个分析中,从两个b喷注中重建希格斯质量在确定信号背景比中起着非常关键的作用。我们用两种方法重建希格斯质量:(A)用两个确定的b-喷注,(B)用喷注子结构技术。此外,施加一定的选择割集,我们观察到的意义是更好的后一种方法。我们发现,一个可行的信号可以获得希格斯质量$\sim$ 125 GeV的积分亮度100 $\lumi$为8和14 TeV的LHC能量。

英文摘要:

We have analyzed the prospect of detecting a higgs signal in mSUGRA/CMSSM based Supersymmetric(SUSY) model via chargino-neutralino($\CH_1\N0_2$) production at 8 TeV and 14 TeV LHC energy. The signal is studied in the channel with $\ell + b \bar b + \PMET$ following the decays, $\CH_1 \to W^\pm \N0_1$, $\N0_2 \to \N0_1 h$ and $h \to b \bar b$. In this analysis reconstruction of the higgs mass out of two b-jets plays a very crucial role in determining the signal to background ratio. We follow two techniques to reconstruct higgs mass: (A) using two identified b-jets, (B) using jet substructure technique. In addition, imposing a certain set of selection cuts we observe the significance is better for the latter method. We find that a viable signal can be obtained for the higgs mass $\sim$ 125 GeV with an integrated luminosity 100 $\lumi$ for both 8 and 14 TeV LHC energy.

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