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arXiv 1407.8539hep-ph
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TeV标度右手中微子标准模型U(1)-素数扩展的真空稳定性

Vacuum Stability in U(1)-Prime Extensions of the Standard Model with TeV Scale Right Handed Neutrinos

Claudio Coriano, Luigi Delle Rose, Carlo Marzo

摘要:

我们研究了标准模型的一个最小的$U(1)'$扩展与一个额外的复杂的标量和一般的规范电荷分配。我们使用一个I型跷跷板机制与三个沉重的右手中微子来说明的约束的电荷,对他们的质量和混合角的两个标量,通过要求的真空稳定性的标量势。我们把我们的研究集中在一个方案,可以在大型强子对撞机访问,通过选择真空期望值的额外的希格斯粒子在TeV范围内,并确定出现在参数空间中的约束。为了说明该方法的通用性,分别分析了对应于$U(1)_{B-L}, U(1)_R$和$U(1)_χ$的特定量规选择。我们的结果是基于一个修改后的表达式的$β$功能的四次耦合的标量势相比,以前的文献。这是由于右手中微子的汤川项系数的变化。与以前的分析不同,我们表明这种耦合可能会使真空不稳定。

英文摘要:

We investigate a minimal $U(1)'$ extension of the Standard Model with one extra complex scalar and generic gauge charge assignments. We use a type-I seesaw mechanism with three heavy right handed neutrinos to illustrate the constraints on the charges, on their mass and on the mixing angle of the two scalars, derived by requiring the vacuum stability of the scalar potential. We focus our study on a scenario which could be accessible at the LHC, by selecting a vacuum expectation value of the extra Higgs in the TeV range and determining the constraints that emerge in the parameter space. To illustrate the generality of the approach, specific gauge choices corresponding to $U(1)_{B-L}, U(1)_R$ and $U(1)_χ$ are separately analyzed. Our results are based on a modified expression of one of the $β$ functions of the quartic couplings of the scalar potential compared to the previous literature. This is due to a change in the coefficient of the Yukawa term of the right handed neutrinos. Differently from previous analysis, we show that this coupling may destabilize the vacuum.

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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