Radiative Symmetry Breaking and Higgs Mass Bound in the NMSSM
Radiative Symmetry Breaking and Higgs Mass Bound in the NMSSM
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NMSSM 中的辐射对称破缺和希格斯质量束缚
DOI：
10.1143/ptp.104.827
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
D. Suematsu
中科院分区：
文献类型：
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作者：
Y. Daikoku;D. Suematsu
利用RGE方法研究了次极小超对称标准模型（NMSSM）中最轻中性Higgs标量的质量上界。我们要求电弱辐射对称性破缺，以限制参数空间。结果，与不施加该条件的情况下计算的质量上限相比，质量上限mh 0受到严重限制。指出了mh 0与ht初值有关的一些特征，并讨论了为什么SU（5）的额外物质场5 +<$较多的模型会产生较大的mh 0最大值.相当轻的CP偶中性希格斯标量的存在是标准模型超对称扩展的一个共同特征。1）、2）这一预测性质的实验验证将为这些模型的有效性提供重要证据。比较这些模型中该粒子的质量上界以判断它们的一致性将是有用的。次最小超对称标准模型（NMSSM）是最小超对称标准模型（MSSM）的最简单扩展。3)在这个模型中，引入了单重手征超多重态S，MSSM中的μ项被Yukawa耦合λ SH 1H 2所取代，其中H1和H2是通常的二重Higgs手征超场。在这个模型中希格斯扇区的超势表示为：
We study the mass upper bound of the lightest neutral Higgs scalar in the next to minimal supersymmetric standard model (NMSSM) using RGE analysis. We require electroweak radiative symmetry breaking in order to restrict the parameter space. As a result, the mass upper bound mh0 is severely constrained compared with that calculated without imposing this condition. We point out some features of mh0 related to the initial value of ht and discuss why models with more extra matter fields 5 + ¯ of SU(5) yield larger maximum value of mh0 . The existence of a rather light CP-even neutral Higgs scalar is a common feature of supersymmetric extensions of the standard model. 1),2) Experimental confirmation of this predicted property would provide important evidence for the validity of these models. It would be useful to compare the mass upper bounds for this particle in these models to judge their consistency. The next to minimal supersymmetric standard model (NMSSM) is the simplest extension of the minimal supersymmetric standard model (MSSM). 3) In this model, a singlet chiral supermultiplet S is introduced, and the µ term in the MSSM is replaced by the Yukawa coupling λSH1H2, where H1 and H2 are the usual doublet Higgs chiral superfields. The superpotential of the Higgs sector in this model is expressed as