Electroweak phase transition in the real triplet extension of the SM: Dimensional reduction

被引：48

作者：

Niemi, Lauri ^{[1
,2
]}

Patel, Hiren H. ^{[3
]}

Ramsey-Musolf, Michael J. ^{[3
]}

Tenkanen, Tuomas V., I ^{[1
,2
]}

Weir, David J. ^{[1
,2
]}

机构：

[1] Univ Helsinki, Dept Phys, PL 64, FI-00014 Helsinki, Finland

[2] Univ Helsinki, Helsinki Inst Phys, PL 64, FI-00014 Helsinki, Finland

[3] Univ Massachusetts, Dept Phys, Amherst Ctr Fundamental Interact, Amherst, MA 01003 USA

来源：

PHYSICAL REVIEW D | 2019年 / 100卷 / 03期

基金：

芬兰科学院; 欧洲研究理事会;

关键词：

STANDARD MODEL;

D O I：

10.1103/PhysRevD.100.035002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a series of two papers, we make a comparative analysis of the performance of conventional perturbation theory to analyze electroweak phase transition in the real triplet extension of the Standard Model (Sigma SM). In Part I (this paper), we derive and present the high-T dimensionally reduced effective theory that is suitable for numerical simulation on the lattice. In Part II, we will present results of the numerical simulation and benchmark the performance of conventional perturbation theory. Under the assumption that Sigma is heavy, the resulting effective theory takes the same form as that derived from the minimal Standard Model. By recasting the existing nonperturbative results, we map out the phase diagram of the model in the plane of triplet mass M-Sigma and Higgs portal coupling a(2). Contrary to conventional perturbation theory, we find regions of parameter space in which the phase transition may be first order, second order, or crossover. We comment on prospects for prospective future colliders to probe the region where the electroweak phase transition is first order by a precise measurement of the h -> gamma gamma partial width.

引用

页数：16

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