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arXiv 1503.01464hep-phhep-ex
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在LHeC的两个Higgs双重模型III型中较轻和较重的希格斯玻色子的味道违反签名

Flavor violating signatures of lighter and heavier Higgs bosons within the Two Higgs Doublet Model Type-III at the LHeC

S. P. Das, J. Hernández-Sánchez, S. Moretti, A. Rosado, R. Xoxocotzi

摘要:

我们分析的前景观察CP-甚至中性希格斯玻色子玻色子(h和H)在他们的衰变到味道违反$b \bar s+ c.c.$通道在拟议的LHeC,与$\sqrt s \approx 1.3$ TeV,在2 HDM III型,假设在汤川矩阵和一般的希格斯势的四个零纹理。我们认为理论上一致的方案与当前的实验数据从风味和希格斯物理。我们调查的带电电流的生产过程$ν_e ϕq$的味道违反衰变的希格斯玻色子玻色子的存在下,导致3-喷气机+ $E\!\!\!\!/_T$签名。我们需要正好两个喷流,一个标记的$b$ -喷流和一个淡味喷流,都在中心快度区。剩余的喷流(起源于回复夸克$q$)被标记在前向或后向区域,这与中央喷流否决(不超过一个轻味喷流)一起是提高信号-背景比率的基本标准。我们考虑最相关的标准模型(SM)的背景下,治疗$c$ -喷流分别从光味和胶子的,同时允许错误的标签。我们发现,SM类希格斯玻色子,$h$,将在我们的模型中的几个参数配置在大约1-2 $σ$水平与100 fb $^{-1}$的数据。我们还发现,最重的中性希格斯玻色子,$H$,质量高达150 GeV,将有1 $σ$的意义相同的数据样本。在LHeC运行结束时,将有十倍的数据积累,并且对于所有的希格斯质量,显著性被增强,以便允许检测$h$和$H$状态。因此,一个最可行的扩展的2 HDM与FCNC的生成在树的水平,但由一个四零纹理的方法控制的汤川矩阵,而不是通过特设离散对称,可以在未来的LHeC进行审查。

英文摘要:

We analyze the prospects for observing the CP-even neutral Higgs bosons (h and H) in their decays into flavor violating $b \bar s+ c.c.$ channels at the proposed LHeC, with $\sqrt s \approx 1.3$ TeV, in the 2HDM Type-III, assuming a four-zero texture in the Yukawa matrices and a general Higgs potential. We consider theoretically consistent scenarios in agreement with current experimental data from flavor and Higgs physics. We investigate the charged current production process $ν_e ϕq$ in presence of flavor violating decays of the Higgs bosons, that lead to a 3-jets + $E\!\!\!\!/_T$ signature. We demand exactly two jets, one tagged $b$-jet and one light-flavor jet, all in the central rapidity region. The remaining jet (originated by the remanent quark $q$) is tagged in the forward or backward regions and this together with a central jet veto (not more than one light-flavor jet) are essential criterions to enhance the signal--to--background rates. We consider the most relevant Standard Model (SM) backgrounds, treating $c$-jets separately from light-flavor and gluon ones, while allowing for mis-tagging. We find that the SM-like Higgs boson, $h$, would be accessible within several parameter configurations of our model at approximately the 1-2$σ$ level with 100 fb$^{-1}$ of data. We also find that the heaviest neutral Higgs boson, $H$, with mass up to 150 GeV, would have a 1$σ$ significance for the same data sample. At the end of the LHeC running, one would have ten times data accumulation and for all the Higgs masses the significances are enhanced so as to allow for detection of both the $h$ and $H$ state. Hence, one of the most viable extensions of 2HDMs with FCNC's generated at tree level but controlled by a four-zero texture approach in the Yukawa matrices, as opposed to the adoption of ad hoc discrete symmetries, could be put under scrutiny at a future LHeC.

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