May 31, 2023 to June 2, 2023
Europe/Zurich timezone

Cosmological history of the HEFT

Jun 2, 2023, 12:20 PM
500/1-001 - Main Auditorium (CERN)

500/1-001 - Main Auditorium


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gravitational waves Gravitational Waves




Effective Field Theories (EFTs) are crucial for new physics searches in the electroweak sector. They are a model-independent framework which can be used to classify the low-energy effects of heavy, new physics on experimental results which deviate from the standard model prediction. For this reason, the Standard Model Effective Field Theory (SMEFT), where the Higgs doublet transforms linearly under electroweak symmetry, has gained recent popularity. However, the SMEFT is not as general an EFT as the Higgs EFT (HEFT), where the Higgs doublet transforms non-linearly. The universe, as always, is reluctant to reveal it's secrets: is it SMEFT or HEFT/SMEFT? Particle colliders will certainly shed some light on this dichotomy, yet they can only probe near the vacuum. We turn instead to cosmology, specifically the gravitational waves that may have been produced in an early universe phase transition, and could provide us with a lens with which to resolve the SMEFT or HEFT/SMEFT dichotomy, and the nature of electroweak symmetry breaking.

Primary author


Juan Carlos Criado Álamo (University of Granada) RACHEL HOUTZ (IPPP Durham) Rodrigo Alonso De Pablo (University of Durham (GB))

Presentation materials