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