Heavy QCD axion model in light of pulsar timing arrays

被引：13

作者：

Ahmadvand, Moslem ^{[1
,2
]}

Bian, Ligong ^{[3
,4
,5
]}

Shakeri, Soroush ^{[6
,7
]}

机构：

[1] Inst Res Fundamental Sci IPM, Sch Particles & Accelerators, POB 19395-5531, Tehran, Iran

[2] Damghan Univ, Sch Phys, Damghan 3671645667, Iran

[3] Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China

[4] Chongqing Univ, Chongqing Key Lab Strongly Coupled Phys, Chongqing 401331, Peoples R China

[5] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

[6] Isfahan Univ Technol, Dept Phys, Esfahan 8415683111, Iran

[7] ICRANet, Piazza Repubbl 10, I-65122 Pescara, Italy

来源：

PHYSICAL REVIEW D | 2023年 / 108卷 / 11期

基金：

中国国家自然科学基金;

关键词：

STRONG-CP PROBLEM; GRAVITATIONAL-RADIATION; SEARCH; WORLD;

D O I：

10.1103/PhysRevD.108.115020

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, pulsar timing array experiments reported the observation of a stochastic gravitational wave background in the nanohertz range frequency band. We show that such a signal can be originated from a cosmological first-order phase transition (PT) within a well-motivated heavy (visible) QCD axion model. Considering the Peccei-Quinn symmetry breaking at the TeV scale in the scenario, we find a supercooled PT, in the parameter space of the model, prolonging the PT with the reheating temperature at the GeV scale.

引用

页数：9

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