27–30 Sept 2022
DESY Hamburg
Europe/Berlin timezone

To Profile or To Marginalize – A SMEFT Case Study

29 Sept 2022, 17:00
15m
Main Auditorium, DESY Hamburg

Main Auditorium, DESY Hamburg

Particle Phenomenology Parallel Session Thursday

Speaker

Nina Elmer

Description

Global SMEFT analyses have become a key interpretation framework for LHC physics, quantifying how well a large set of kinematic measurements agrees with the Standard Model. This agreement is encoded in measured Wilson coefficients and their uncertain- ties. A technical challenge of global analyses are correlations. We compare, for the first time, results from a profile likelihood and a Bayesian marginalization for a given data set with a comprehensive uncertainty treatment. Using the validated Bayesian framework we analyse a series of new kinematic measurements. For the updated dataset we find and explain differences between the marginalization and profile likelihood treatments.

Primary authors

Emma Geoffray Ilaria Brivio Nina Elmer Michel Luchman Sebastian Bruggisser Tilman Plehn

Presentation materials