Dark, cold, and noisy: constraining secluded hidden sectors with gravitational waves

被引：168

作者：

Breitbach, Moritz ^{[1
,2
]}

Kopp, Joachim ^{[1
,2
,3
]}

Madge, Eric ^{[1
,2
]}

Opferkuch, Toby ^{[1
,2
]}

Schwaller, Pedro ^{[1
,2
]}

机构：

[1] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55099 Mainz, Germany

[2] Johannes Gutenberg Univ Mainz, Mainz Inst Theoret Phys, D-55099 Mainz, Germany

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

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2019年 / 07期

基金：

欧洲研究理事会;

关键词：

cosmological phase transitions; cosmology of theories beyond the SM; gravitational waves / sources; cosmological neutrinos; FINITE-TEMPERATURE; NUCLEATION; RADIATION; NUMBER; LIMITS;

D O I：

10.1088/1475-7516/2019/07/007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore gravitational wave signals arising from first-order phase transitions occurring in a secluded hidden sector, allowing for the possibility that the hidden sector may have a different temperature than the Standard Model sector. We present the sensitivity to such scenarios for both current and future gravitational wave detectors in a model-independent fashion. Since secluded hidden sectors are of particular interest for dark matter models at the MeV scale or below, we pay special attention to the reach of pulsar timing arrays. Cosmological constraints on light degrees of freedom restrict the number of sub-MeV particles in a hidden sector, as well as the hidden sector temperature. Nevertheless, we find that observable first-order phase transitions can occur. To illustrate our results, we consider two minimal benchmark models: a model with two gauge singlet scalars and a model with a spontaneously broken U(1) gauge symmetry in the hidden sector.

引用

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