Unitarity bounds on extensions of Higgs sector

被引：1
作者：
Lu, Bo-Qiang [1 ]
Huang, Da [2 ,3 ,4 ]
机构：
[1] Huzhou Univ, Sch Sci, Huzhou 313000, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
[3] UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China
[4] Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Higgs Properties; Multi-Higgs Models; Anomalous Higgs Couplings; ANOMALOUS MAGNETIC-MOMENT; TREE-LEVEL UNITARITY; NEUTRINO MASSES; BOSON MASSES; WEAK-INTERACTIONS; HIGH-ENERGIES; II SEESAW; MODEL; MUON; NONCONSERVATION;
D O I：
10.1007/JHEP06(2023)209
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
It is widely believed that extensions of the minimal Higgs sector is one of the promising directions for resolving many puzzles beyond the Standard Model (SM). In this work, we study the unitarity bounds on the models by extending the two-Higgs-doublet model with an additional real or complex Higgs triplet scalar. By noting that the SM gauge symmetries SU(2)(L) x U(1)(Y) are recovered at high energies, we can classify the two-body scattering states by decomposing the direct product of two scalar multiplets into their direct sum of irreducible representations of electroweak gauge groups. In such state bases, the s-wave amplitudes of two-body scalar scatterings can be written in the form of block-diagonalized scattering matrices. Then the application of the perturbative unitarity conditions on the eigenvalues of scattering matrices leads to the analytic constraints on the model parameters. Finally, we numerically investigate the complex triplet scalar extension of the two-Higgs-doublet model, finding that the perturbative unitarity places useful stringent bounds on the model parameter space.
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页数：29
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