2017/06/08 by D. Espriu, Espriu, D., Alisa Katanaeva +2 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #FOS: Physical sciences #Geometry #Goldstone boson #Higgs boson #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Massless particle #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Scalar (mathematics) #Spontaneous symmetry breaking #Symmetry breaking #Theoretical physics #Vector boson #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.1706.02651
published in arXiv (Cornell University) (Cornell University) · 29 pages, 2 figures
openalex publication_date 2017/06/08 · openalex created_date 2017/06/15 · arxiv created 2017/10/09 · arxiv updated 2017/10/10 · openalex updated_date 2026/07/28
We study a 5D bottom-up holographic model that is expected to describe the dynamics of the minimal composite Higgs model characterized by a SO(5)→ SO(4) global symmetry breaking pattern. We assume that the fundamental degrees of freedom are scalars transforming under some representation of SO(5) and subject to some unspecified strong interactions. The holographic description presented here is inspired by previous studies performed in the context of QCD and it allows for the consideration of spin one and spin zero resonances. The resulting spectrum leads in a natural way to a variety of resonances. Namely, those transforming under the unbroken SO(4) subgroup exhibit an exact degeneracy between the two Regge trajectories of vector and scalar channels, while the resonances with quantum numbers in the SO(5)/ SO(4) coset lie on a trajectory of (heavier) spin one states and a non-degenerated one of scalar resonances where the four lowest lying ones are massless. These correspond to the four Goldstone bosons in 4D associated to the global symmetry breaking pattern. Restrictions derived from the experimental constraints (Higgs couplings, S parameter, etc.) are then implemented and we conclude that the model is able to accommodate vector and scalar resonances with masses in the range 1 TeV to 2 TeV without encountering phenomenological difficulties. Extension to generic models characterized by the breaking pattern SO(N)→ SO(N^′