Vacuum stability in inert higgs doublet model with right-handed neutrinos

被引：11

作者：

Jangid, Shilpa ^{[1
]}

Bandyopadhyay, Priyotosh ^{[1
]}

Dev, P. S. Bhupal ^{[2
,3
]}

Kumar, Arjun ^{[4
]}

机构：

[1] Indian Inst Technol Hyderabad, Sangareddy 502287, Telengana, India

[2] Washington Univ, Dept Phys, St Louis, MO 63130 USA

[3] Washington Univ, McDonnell Ctr Space Sci, St Louis, MO 63130 USA

[4] Indian Inst Technol Delhi, Delhi 110016, India

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 2020卷 / 08期

关键词：

Beyond Standard Model; Neutrino Physics; Higgs Physics; STANDARD MODEL; SYMMETRY-BREAKING; SPLIT SUPERSYMMETRY; BOSON MASS; MECHANISM; BOUNDS; SCALE; SUSY;

D O I：

10.1007/JHEP08(2020)154

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：

We analyze the vacuum stability in the inert Higgs doublet extension of the Standard Model (SM), augmented by right-handed neutrinos (RHNs) to explain neutrino masses at tree level by the seesaw mechanism. We make a comparative study of the high- and low-scale seesaw scenarios and the effect of the Dirac neutrino Yukawa couplings on the stability of the Higgs potential. Bounds on the scalar quartic couplings and Dirac Yukawa couplings are obtained from vacuum stability and perturbativity considerations. These bounds are found to be relevant only for low-scale seesaw scenarios with relatively large Yukawa couplings. The regions corresponding to stability, metastability and instability of the electroweak vacuum are identified. These theoretical constraints give a very predictive parameter space for the couplings and masses of the new scalars and RHNs which can be tested at the LHC and future colliders. The lightest non-SM neutral CP-even/odd scalar can be a good dark matter candidate and the corresponding collider signatures are also predicted for the model.

引用

页数：37

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