Dark matter at the LHC: EFTs and gauge invariance

28 Aug 2015, 16:50
20m
Bay ()

Bay

Particle Cosmology Theory and Experiment Particle Cosmology

Speaker

Rebecca Leane (University of Melbourne)

Description

Effective field theory (EFT) formulations of dark matter interactions are a convenient and popular way to quantify LHC bounds on dark matter. However, some EFT operators considered do not respect the weak gauge symmetries of the Standard Model. These operators break down at the electroweak scale, rather than the energy scale of new physics, and are invalid at LHC energies. We carefully discuss the circumstances in which such operators can arise, and use the mono-$W$ process to illustrate potential issues in their interpretation and application. We also discuss a simple UV complete model that avoids such difficulties.

Primary authors

James Dent (University of Louisiana at Lafayette) Nicole Bell (University of Melbourne) Rebecca Leane (University of Melbourne) Tom Weiler (Vanderbilt University) Yi Cai (University of Melbourne)

Presentation Materials