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(Seminar) Gravitational Waves in the Axion-Like Particle Model
2019-07-05     Text Size:  A

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

Seminar

Title

题目

Gravitational Waves in the Axion-Like Particle Model

Speaker

报告人

Yongchao Zhang (张永超)

Affiliation

所在单位

Washington University in St. Louis (圣路易斯华盛顿大学)

Date

日期

2019年7 月 5 日(周五)下午 4:30

Venue

地点

ITP South Building 6420

Abstract

摘要

Once there is a global U(1) symmetry broken at a high-energy scale f_a, we will have a light axion-like particle (ALP) from the spontaneous symmetry breaking. In a large parameter space, the global U(1) symmetry breaking induces a strongly first order phase transition, thereby producing stochastic gravitational waves (GWs). A broad range of the U(1) breaking scale f_a can be probed in the GW experiments, i.e. from 10^3 GeV to 10^8 GeV. All the ALP couplings to the Standard Model particles are proportional to inverse powers of the energy scale f_a, and the GW prospects are largely complementary to the current low-energy laboratory, astrophysical and cosmological probes of ALPs.

Contact Person

所内联系人

杨金民  舒菁  李田军

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