Gravitational waves from breaking of an extra U(1) in SO(10) grand unification

被引：18
作者：
Okada, Nobuchika [1 ]
Seto, Osamu [2 ,3 ]
Uchida, Hikaru [3 ]
机构：
[1] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[2] Hokkaido Univ, Inst Adv Higher Educ, Sapporo, Hokkaido 0600817, Japan
[3] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan
来源：
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS | 2021年 / 2021卷 / 03期
关键词：
B-L; RADIATION; SYMMETRY; MASS;
D O I：
10.1093/ptep/ptab003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In a class of gauged U(1) extended Standard Models (SMs), the breaking of the U(1) symmetry is not only a source for Majorana masses of right-handed (RH) neutrinos crucial for the seesaw mechanism, but also a source of stochastic gravitational wave (GW) background. Such U(1) extended models are well-motivated from the viewpoint of grand unification. In this paper, we discuss a successful ultraviolet completion of a U(1) extended SM by an SO(10) grand unified model through an intermediate step of SU(5) x U(1) unification. With a parameter set that is compatible with the SO(10) grand unification, we find that a first-order phase transition associated with the U(1) symmetry breaking can be strong enough to generate GWs with a detectable size of amplitude. We also find that the resultant GW amplitude reduces and its peak frequency becomes higher as the RH neutrino masses increase.
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页数：16
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