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arXiv 1201.2898hep-phhep-ex
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$E_6$ SSM中的规范动力学混合

Gauge Kinetic Mixing in the $E_6$SSM

Thomas G. Rizzo

摘要:

MSSM的$E_6$ SSM扩展允许解决在常规超对称性破坏场景中通常遇到的许多困难,例如,$μ$问题,“手工”施加R宇称,产生轻中微子质量,并获得质量高达$\sim$ 125 GeV的轻希格斯玻色子,正如最近的LHC测量所建议的那样。在解决这些问题时,这种情况预测存在额外的单重和矢量超场超出MSSM中的那些,以及可能的两个新的中性规范玻色子附近的TeV尺度。本文探讨了在$E_6$ SSM方案中,通常的标准模型(SM)超荷规范场和这两种新的中性规范场之间同时发生规范动力学混合的唯象意义。为此,一大类实现这种类型的动力学混合的具体玩具模型进行检查。特别是,我们证明了一个显着的抑制(或增强)的预期事件发生率$Z'$生产的双轻子通道在大型强子对撞机是不太可能发生在这种情况下,由于规范动力学混合。

英文摘要:

The $E_6$SSM extension of the MSSM allows for the solution of many of the difficulties that are usually encountered within conventional SUSY breaking scenarios, e.g., the $μ$ problem, the imposition of R-parity 'by hand', the generation of light neutrino masses and obtaining a light Higgs boson with a mass as large as $\sim$ 125 GeV as suggested by recent LHC measurements. In addressing these problems, such a scenario predicts the existence of additional singlet and vector-like superfields beyond those in the MSSM as well as possibly two new neutral gauge bosons near the TeV scale. In this paper the phenomenological implications of simultaneous gauge kinetic mixing between the usual Standard Model (SM) hypercharge gauge field and both these new neutral gauge fields present in the $E_6$SSM scenario is explored. To this end a large class of specific toy models realizing this type of kinetic mixing is examined. In particular, we demonstrate that a significant suppression (or enhancement) of the expected event rate for $Z'$ production in the dilepton channel at the LHC is not likely to occur in this scenario due to gauge kinetic mixing.

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