Skip to Content

Physics Colloquium Series

Date: Thursday, October 10, 2019

Speaker: Timothy Cohen, University of Oregon, Physics dept.

Title: Describing Nature Effectively

Abstract: The aim of this colloquium will be to provide some insight into a modern point of view on dimensional analysis known as Effective Field Theory.  This approach systematically distills a physical problem to the essential degrees of freedom that are relevant for modeling the dynamics of interest.  After discussing some intuitive examples, I will describe a situation where these techniques have recently been put to use by myself and collaborators:  heavy dark matter annihilations relevant for indirect detection.  I will expose an issue with the standard Feynman diagram perturbation theory that arises when attempting to predict the annihilation rate.  I will then sketch how Effective Field Theory techniques can be used to restore our ability to calculate in a controlled way, allowing us to produce a precision prediction that is relevant for current and future experiments.

Location: Room 100, Willamette hall

Host: Laura Jeanty

Please join us for a catered reception at 3:40pm in the Paul Olum, Willamette Hall Atrium.

Colloquium Preview

Colloquium Archive