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arXiv 1306.1670hep-ph
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e+ e碰撞中弱规范玻色子熔合过程的带电Higgs和中性Higgs对产生

Charged Higgs and Neutral Higgs pair production of weak gauge bosons fusion process in e+ e- collision

Takuya Morozumi, Kotaro Tamai

摘要:

本文研究了在亲中微子Higgs双二重态模型中Higgs粒子的对产生及其衰变。对的产生是通过W和Z规范玻色子的融合过程进行的。在亲中微子模型中,第二个希格斯偶线的真空期望值(VEV)很小,与中微子质量成正比。VEV的小与近似的整体U(1)对称性略有破缺有关。因此,存在用于U(1)电荷断裂过程的抑制因子。第二个希格斯二重态带有U(1)电荷,它从规范玻色子融合中的单一产生违反了U(1)电荷守恒,并被强烈抑制发生。为了寻找对撞机实验中的成对产生,我们研究了一对带电Higgs和中性希格斯玻色子玻色子截面的产生,能量中心为600(GeV)~ 2000(GeV).对于简并(200 GeV)带电和中性Higgses质量的情况,总截面在10^{-4}(fb)到10^{-3}(fb)之间变化。信号的背景过程是规范玻色子对W + Z的产生和衰变。结合截面比和支化分数比,我们发现信号背景比约为2% ~ 3%。

英文摘要:

In this paper, we study the pair production and their decays of the Higges in the neutrinophilic Higgs two doublet model. The pair production occurs through W and Z gauge bosons fusion process. In the neutrinophilic model, the vacuum expectation value (VEV) of the second Higgs doublet is small and is proportional to the neutrino mass. The smallness of VEV is associated with the approximate global U(1) symmetry which is slightly broken. Therefore, there is a suppression factor for the U(1) charge breaking process. The second Higgs doublet has U(1) charge and its single production from the gauge boson fusion violates the U(1) charge conservation and is suppressed strongly to occur. In contrast to the single production, the pair production of the Higgses conserves U(1) charge and the approximate symmetry does not forbid it. To search for the pair productions in collider experiment,we study the production cross section of a pair of the charged Higgs and neutral Higgs bosons in e+ e- collision with center of energy from 600 (GeV) to 2000 (GeV). The total cross section varies from 10^{-4}(fb) to 10^{-3}(fb) for degenerate (200 GeV) charged and neutral Higgses mass case. The background process to the signal is gauge bosons pair W + Z production and their decays. We show the signal over background ratio is about 2% ~ 3% by combining the cross section ratio with ratios of branching fractions.

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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