Probing the scale of grand unification with gravitational waves

被引：86

作者：

Buchmuller, Wilfried ^{[1
]}

Domcke, Valerie ^{[1
]}

Murayama, Hitoshi ^{[1
,2
,3
,4
]}

Schmitz, Kai ^{[5
]}

机构：

[1] DESY, D-22607 Hamburg, Germany

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[4] Univ Tokyo, Kavli IPMU WPI, Kashiwa, Chiba 2778583, Japan

[5] CERN, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland

来源：

PHYSICS LETTERS B | 2020年 / 809卷

基金：

欧盟地平线“2020”;

关键词：

INFLATION; LEPTOGENESIS; ORIGIN; MASS;

D O I：

10.1016/j.physletb.2020.135764

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The spontaneous breaking of U(1)(B-L) around the scale of grand unification can simultaneously account for hybrid inflation, leptogenesis, and neutralino dark matter, thus resolving three major puzzles of particle physics and cosmology in a single predictive framework. The B-L phase transition also results in a network of cosmic strings. If strong and electroweak interactions are unified in an S O (10) gauge group, containing U(1)(B-L) as a subgroup, these strings are metastable. In this case, they produce a stochastic background of gravitational waves that evades current pulsar timing bounds, but features a flat spectrum with amplitude h(2)Omega(GW) similar to 10(-8) at interferometer frequencies. Ongoing and future LIGO observations will hence probe the scale of B - L breaking. (C) 2020 The Author(s). Published by Elsevier B.V.

引用

页数：5

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