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arXiv 1207.0802hep-phhep-ex
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125 GeV希格斯玻色子在非退耦MSSM方案中的性质

Properties of 125 GeV Higgs boson in non-decoupling MSSM scenarios

Kaoru Hagiwara, Jae Sik Lee, Junya Nakamura

摘要:

在大型强子对撞机上已经报道了质量在125 GeV左右的希格斯玻色子玻色子的诱人暗示。我们探索MSSM参数空间中,125 GeV的状态被确定为较重的CP甚至希格斯玻色子,并研究两种情况下,双光子产生率可以显着大于标准模型(SM)。在一种情况下,$Γ(H\to γγ)$通过光状态贡献而增强,而$WW^{\ast}$($ZZ^{\ast}$)速率保持在SM速率附近。在另一种情况下,$Γ(H\to b\bar{b})$被抑制,并且不仅$γγ$,而且$WW^{\ast}$($ZZ^{\ast}$)速率都应该提高。在两种情况下,$τ\barτ$速率可以显著大于或小于SM速率。其他共同的特征包括顶夸克衰变为带电的希格斯玻色子,在$\sqrt{s}\lesssim 300$ GeV的$e^+e^-$碰撞中产生单个和成对的希格斯玻色子。

英文摘要:

Tantalizing hints of the Higgs boson of mass around 125 GeV have been reported at the LHC. We explore the MSSM parameter space in which the 125 GeV state is identified as the heavier of the CP even Higgs bosons, and study two scenarios where the two photon production rate can be significantly larger than the standard model (SM). In one scenario, $Γ(H\to γγ)$ is enhanced by a light stau contribution, while the $WW^{\ast}$ ($ZZ^{\ast}$) rate stays around the SM rate. In the other scenario, $Γ(H\to b\bar{b})$ is suppressed and not only the $γγ$ but also the $WW^{\ast}$ ($ZZ^{\ast}$) rates should be enhanced. The $τ\barτ$ rate can be significantly larger or smaller than the SM rate in both scenarios. Other common features of the scenarios include top quark decays into charged Higgs boson, single and pair production of all Higgs bosons in $e^+e^-$ collisions at $\sqrt{s}\lesssim 300$ GeV.

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