Theory Colloquia
# The Hidden Geometry of Particle Collisions

##
by

→
Europe/Zurich

Zoom only (CERN)
### Zoom only

#### CERN

Description

In this colloquium, I explain how many concepts and techniques in quantum field theory and collider physics can be naturally translated into a new geometric language. Using the energy mover's distance, which quantifies the minimal amount of "work" required to rearrange one event into another, we can define a distance between pairs of collider events. This distance can then be used to triangulate the "space" of collider events and rigorously define various geometric objects. Many well-known collider observables, jet algorithms, and pileup mitigation schemes have a simple geometric interpretation, as does the important concept of infrared and collinear safety. Intriguingly, these ideas can be lifted from a distance between events into a distance between theories, with potential relevance for visualizing and interpreting data from the LHC.

*Zoom connection details:*

https://cern.zoom.us/j/92401905276?pwd=RGFZUjlPdmVxUEs1N1hmSys2bHRaQT09

Meeting ID: 924 0190 5276

Password: 033310

Connection by phone: see https://cern.zoom.us/u/acdHX3KPWQ