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Physics & Astronomy Cosmology Seminar - Dr. Tomohiro Fujita, Waseda University

Title: "SU(N)-natural inflation"

Tuesday, February 28, 2023
1:30pm – 2:30pm
Wilder 202 and Zoom
Intended Audience(s): Public
Categories: Arts and Sciences, Lectures & Seminars

Abstract: The remaining problems in particle physics and cosmologysuggest the existence of new physics which would have played significantroles in the early universe. Primordial gravitational waves are a newway to probe unknown physics, and next-generation observations such asLiteBIRD satellite and CMB-S4 observatory are on-going. Axion inflationis a model well motivated by particle physics, and it is also known toproduce detectable gravitational waves, especially when the axion iscoupled to U(1) or SU(2) gauge fields. We have found general solutionsfor an extended class of models where the axion coupled to gauge fieldsof any symmetries (SU(5), SO(10), E_8, etc.), which also generate stronggravitational waves. This opens up the possibility of distinguishinggauge groups realized in the high-energy universe from primordialgravitational wave observations. In this seminar, I will present theinflationary models and related observational signatures without gettingtoo technical.

Hosted by Professor Robert Caldwell

Join Zoom Meeting
https://dartmouth.zoom.us/j/97035035123?pwd=cWVnelNUblRkelltMkRzS2xQQWp0QT09

Meeting ID: 970 3503 5123
Passcode: Cosmos

For more information, contact:
Tressena Manning
tressena.a.manning@dartmouth.edu
603-646-2854
Permanent URL to this event: https://physics.dartmouth.edu/events/event?event=69656

Events are free and open to the public unless otherwise noted.