Northwestern Events Calendar


HEP Seminar: Yongchao Zhang: Gravitational Waves in the Axion-Like Particle Model

When: Monday, September 30, 2019
4:00 PM - 5:00 PM Central

Where: Technological Institute, F160, 2145 Sheridan Road, Evanston, IL 60208 map it

Audience: Faculty/Staff - Student - Public - Post Docs/Docs - Graduate Students

Contact: Pamela Villalovoz   (847) 491-3644

Group: Physics and Astronomy High Energy Physics Seminars

Category: Academic


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 future GW experiments, i.e. from 10^ 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.


Seminar Speaker: Yongchao Zhang, Washington University


Keywords: Physics, Astronomy, HEP

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