BSM PANDEMIC Seminars

DOUBLE FEATURE (11/13)

by Patrick Komiske (Massachusetts Institute of Technology) , Daniel Vagie (University of Oklahoma)

America/New_York
Description

14:00 Patrick Komiske

Title: The Hidden Geometry of Particle Collisions

Abstract:

I will discuss recent developments in collider physics towards identifying and utilizing a “hidden” geometry of particle collisions. Building off the recently introduced Energy Mover’s Distance (EMD), I will endow the space of events with a metric, which will enable more complicated geometric primitives, such as N-particle manifolds, to be described. Using these tools, I will show how numerous aspects of the modern theoretical and experimental collider program can be naturally understood in this geometric language, including infrared singularities, Sudakov safety, event and jet substructure observables, jet clustering, pileup mitigation, and more. I will conclude by discussing how these ideas can be bootstrapped to provide insight into the space of theories.

 

14:30 Daniel Vagie

Title: Phase Transitions and Gravitational Waves: Views from the Precision Calculation Frontier

Abstract: 

Stochastic gravitational waves originating from phase transitions can provide insight into the history of the early universe and open up new avenues to probe physics beyond the Standard Model. Future space based gravitational wave detectors will come online in the upcoming years alongside the upgrade of the HL-LHC. This wll allow for a unique complimentary approach to new physics that merges the physics of gravitational waves with collider and particle physics. Extracting the relevant particle physics from gravitational wave observations requires precise calculations of the phase transition dynamics in an expanding universe and the proper treatment of various subtle theoretical uncertainties. I will highlight some recent advances in modeling and estimating the gravitational wave spectrum. In particular, I will discuss our recent work where we found an important suppression factor for the gravitational wave amplitude that is a consequence of the finite lifetime of the source. I will compare the resulting signal with commonly used results in the literature.

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