HET seminar

"Making massive spin-2 particles from gravity during inflation"

Presented by Andrew Long, Rice University

Thursday, September 14, 2023, 11:00 am — Small Seminar Room, Bldg. 510

In person in small seminar room. (Start time possibly delayed ~15m for all hands meeting.) Abstract: The phenomenon of cosmological gravitational particle production (CGPP) occurs during and after inflation as light fields "feel" the cosmological expansion and their mode functions evolve non-adiabatically. CGPP is a compelling and minimal explanation for the origin of dark matter, which might only interact gravitationally, as well as other cosmological relics. Various studies have explored CGPP for massive particles with spin up to 3/2, and by doing so, identified interesting and unexpected features such as quantum interference effects and "catastrophic" production of high-momentum modes. In this presentation, I will describe how CGPP arises for massive spin-2 particles in the context of bigravity. I'll discuss the implications for massive spin-2 particles as a dark matter candidate and related issues including the avoidance of ghost instabilities (FRW-generalized Higuchi bound).

Hosted by: Peter Denton

Join Videoconference More Information

19284  |  INT/EXT  |  Events Calendar

 

Not all computers/devices will add this event to your calendar automatically.

A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.

Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.