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arXiv 2102.02800hep-ph
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S3-symmetry下3-Higgs双重态模型的标量和规范扇区

Scalar and gauge sectors in the 3-Higgs Doublet Model under the S3-symmetry

M. Gómez-Bock, M. Mondragón, A. Pérez-Martínez

摘要:

我们分析了具有三个Higgs二重态且无CP破坏的$S_3$模型的Higgs扇区。弱电破缺后有9个物理希格斯玻色子,其中一个对应于标准模型。我们研究了该模型的标量和规范部门,考虑到由潜在的最小化和稳定性所设定的条件。我们计算的质量,三线性和四次希格斯-希格斯,希格斯规范耦合。我们考虑两种可能的对齐方案,只有一个三个中性标量耦合到规范玻色子,并对应于SM希格斯,其三线性和四次耦合减少正好SM的。我们还获得数值上的标量质量在每个对齐的情况下允许的参数空间。我们使用计算的三线性和四次耦合找到的分析结构的单圈中性标量质量矩阵,没有费米子的贡献。我们表明,它是可能有一个紧凑的质谱的倾斜参数的贡献可能是小的。我们探讨了一些情况下的环路贡献的中性标量质量。

英文摘要:

We analyse the Higgs sector of an $S_3$ model with three Higgs doublets and no CP violation. After electroweak breaking there are nine physical Higgs bosons, one of which corresponds to the Standard Model one. We study the scalar and gauge sectors of this model, taking into account the conditions set by the minimisation and stability of the potential. We calculate the masses, trilinear and quartic Higgs-Higgs, and Higgs-gauge couplings. We consider two possible alignment scenarios, where only one of the three neutral scalars has couplings to the gauge bosons and corresponds to the SM Higgs, and whose trilinear and quartic couplings reduce exactly to the SM ones. We also obtain numerically the allowed parameter space for the scalar masses in each of the alignment scenarios. We use the calculated trilinear and quartic couplings to find the analytical structure of the one-loop neutral scalar mass matrix, without fermionic contributions. We show that it is possible to have a compact mass spectrum where the contribution to the oblique parameters might be small. We explore some scenarios for the loop contributions to the neutral scalar masses.

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