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arXiv 1107.4634hep-ph
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使中微子成为具有$U(1)_R$轻子数的希格斯粒子

Making the Sneutrino a Higgs with a $U(1)_R$ Lepton Number

Claudia Frugiuele, Thomas Gregoire

摘要:

我们提出了一个标准模型的超对称扩展,它具有连续的$ U(1)_R$对称性,它与三个轻子数之一相一致,其中超中微子vev给下型夸克和轻子质量。这个想法允许比标准模型(MRSSM)的最小$R$对称超对称扩展更小的粒子含量。我们探讨这个模型的界限来自电弱精密测量,中微子质量和引力衰变。从电弱精密测量的边界导致一个双边的约束$\tan β$,而引力子衰变部队低再加热温度。最后,从$R$对称性破坏产生的中微子质量给超对称破缺标度增加了一个上限。尽管如此,我们发现,允许的参数空间仍然很大,并会导致一个独特的现象在大型强子对撞机。

英文摘要:

We present a supersymmetric extension of the Standard Model that posseses a continuous $ U(1)_R$ symmetry, which is identified with one of three lepton numbers, and where a sneutrino vev gives mass to the down type quark and leptons. This idea allows for a smaller particle content than the minimal $R$-symmetric supersymmetry extension of the standard model (MRSSM). We explore bounds on this model coming from electroweak precision measurements, neutrino masses and gravitino decay. Bounds from electroweak precision measurements lead to a two-sided bound on $\tan β$ while gravitino decay forces a low reheating temperature. Finally, the generation of neutrino masses from $R$-symmetry violation put an upper bound on the SUSY breaking scale. Despite all of this, we find that the allowed parameter space is still large and would lead to a distinctive phenomenology at the LHC.

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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