Global electroweak symmetric vacuum

被引：9

作者：

Bai, Yang ^{[1
]}

Lee, Seung J. ^{[2
]}

Son, Minho ^{[3
]}

Ye, Fang ^{[3
]}

机构：

[1] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA

[2] Korea Univ, Dept Phys, Anam Dong 5, Seoul 136713, South Korea

[3] Korea Adv Inst Sci & Technol, Dept Phys, 291 Daehak Ro, Daejeon 34141, South Korea

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 2021卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

Beyond Standard Model; Cosmology of Theories beyond the SM; Higgs Physics; Thermal Field Theory; FALSE VACUUM; TEMPERATURE; FATE;

D O I：

10.1007/JHEP07(2021)225

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：

Although the Higgs potential in the Standard Model (SM) contains only a simple electroweak symmetry breaking vacuum in the small field region, additional metastable or global vacua could exist in models beyond the SM. In this paper, we study one intriguing scenario with an additional electroweak symmetric vacuum that could be the global one. For the thermal universe ending at the current metastable vacuum, the electroweak symmetry should stay non-restored at high temperatures. We realize the scenario in a model with Higgs-portal couplings to SM singlet scalars with approximately global O(N) symmetries with a large N. For a large portion of model parameter space, both the quantum and thermal tunneling rates are suppressed such that our current metastable vacuum is long-lived enough. Our scenario predicts order-one changes for the Higgs self-couplings and a large contribution to the signal of the off-shell Higgs invisible decay. It can be partly probed at the LHC Run 3 and well tested at the high luminosity LHC. We also discuss the subcritical (anti-de Sitter) bubbles from the thermal tunneling that could have a large population and interesting cosmological implications.

引用

页数：36

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