2008/11/30 by Riccardo Barbieri, Gino Isidori, Duccio Pappadopulo · 2 citations
Mathematics · Physics and Astronomy · #Atomic and Subatomic Physics Research #Composite material #Composite number #Dark Matter and Cosmic Phenomena #Electroweak interaction #Fermion #Gauge boson #Gauge theory #Geometry #Materials science #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Symmetry (geometry) #Symmetry breaking #Technicolor #Theoretical physics #hep-ph
paper · pdf · doi:10.1088/1126-6708/2009/02/029
published as JHEP 0902:029,2009 · 18 pages, 2 figures (v2: minor modifications, published version)
openalex publication_date 2009/02/10 · arxiv created 2009/03/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
If the electroweak symmetry is broken by some unspecified strong dynamics, composite fermions may exist with definite transformation properties under SU(2)L x SU(2)R/SU(2)L+R and may play a role in giving masses by mixing to all the standard quarks and leptons. Assuming this to be the case, we analyze the role of Singlets, Doublets and Triplets in the ElectroWeak Precision Tests and in Flavour Physics. Doublets and Triplets are generically disfavoured. In the Singlet case, we specify the breaking patterns of the flavour group that allow to keep the CKM picture of flavour physics and we discuss the effects of the mixing between composite and elementary fermions. These mixings affect in particular the rather peculiar LHC phenomenology of the composite fermions.