Apr 18 – 22, 2011
Palais des Papes, Avignon
Europe/Paris timezone

Electroweak Baryogenesis from a Composite Higgs Sector

Apr 19, 2011, 2:50 PM
Chambre du Trésorier (Palais des Papes, Avignon)

Chambre du Trésorier

Palais des Papes, Avignon


Francesco Riva (IFAE)


One of the most appealing explanation of physics at the electroweak scale is given by composite Higgs models, where the Higgs boson is a bound state of a new strongly-interacting dynamics. While the minimal realization of compositeness differs only slightly from the Standard Model (SM), non-minimal realizations, based on larger coset structures, can have a much richer phenomenology and account for phenomena that can't be explained within the SM, such as electroweak baryogenesis (EWBG). In particular, in models based on the SO(6)/SO(5) coset structure (which describe five light degrees of freedom: four belonging to the Higgs and one belonging to a new light CP-odd scalar singlet) the existence of an extra gauge singlet in the Higgs sector influence the strength of the phase transition and its CP-odd couplings provide the extra source of CP violation. Furthermore, at low energy, this set up consisting of the Higgs plus a CP-odd singlet coupled to the fermions, provides the most minimal scenario capable of explaining the baryon asymmetry.

Primary author

Francesco Riva (IFAE)

Presentation materials