Northwestern Events Calendar

Jan
25
2021

HEP Seminar: Vedran Brdar: Gravitational waves and new physics

When: Monday, January 25, 2021
4:00 PM - 5:00 PM Central

Where: Online

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

Contact: Yas Shemirani   (847) 491-3644

Group: Physics and Astronomy High Energy Physics Seminars

Category: Academic

Description:

Abstract:

In the first part of the talk I will discuss gravitational wave signature arising from first order phase transition in two different models featuring neutrino mass generation through type-I seesaw mechanism. The expected gravitational wave spectra from these models will be confronted with sensitivities of ground-based detectors such as LIGO as well as several future space-based observatories. I will show that in case current and future gravitational wave observatories find stochastic gravitational wave component that is not of astrophysical origin, such beyond the Standard Model signature would hint scale-invariant dynamics.

In the second part of the talk I will discuss recent work on the gravitational wave production from topological defects. The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has recently reported strong evidence for a stochastic common-spectrum process affecting the pulsar timing residuals in its 12.5-year data set.

I will  show that this process admits an interpretation in terms of a stochastic gravitational-wave background emitted by a cosmic-string network in the early Universe.

Seminar Speaker: Vedran Brdar, Northwestern University

Host: André de Gouvea

 

Meeting Details:
Monday, January 25, 2021 at 4:00pm (Central Time)

Zoom info:
Please email yassaman.shemirani@northwestern.edu to get the Zoom meeting link. 

Keywords: Physics, Astronomy, HEP

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