1999/04/14 by B. Machet, Machet, B. · 3 citations
Physics and Astronomy · #Electroweak interaction #FOS: Physical sciences #Gauge (firearms) #Gauge boson #Gauge theory #Higgs boson #Higgs field #Higgs mechanism #High Energy Physics - Phenomenology (hep-ph) #Lepton #Meson #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quark #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9904327
published in arXiv (Cornell University) (Cornell University) · 22 pages LaTeX 2e (epsf) with 8 figures and 1 logo (postscript)
arxiv created 1999/04/14 · openalex publication_date 1999/04/14 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
I study phenomenological aspects of the SU(2)L x U(1) electroweak physics of a Higgs boson transforming like a quark-antiquark pair. A correspondence is established between its flavour content, the hierarchy of quark condensates, and the leptonic decay constants f of pseudoscalar mesons; the Higgs-mesons couplings coming from the symmetry-breaking scalar potential can then be expressed in terms of the f's, of the Cabibbo-Kobayashi-Maskawa mixing angles, and of the mass of the Higgs boson. Application is made to the decays of a Z boson into two leptons and two charged pseudoscalar mesons, more specially e+e- B+B-, e+e- Ds+Ds- and e+e- K^± π^∓; the last channel, involving new types of flavour changing neutral currents in the scalar sector, is characteristic of this approach. Unlike in the standard model for quarks, the detection of two outgoing charged B mesons is hopeless, like, unfortunately, that of K^± π^∓; the channel Ds+ Ds- could have been missed in present experiments for a Higgs mass lower than 65 GeV because of insufficient statistics. For higher masses this Higgs becomes undetectable from such channels. This shows that too drastic conclusions should not be drawn from an eventual negative outcome from searches for the standard Higgs boson, that simple variants of it are more elusive, may have escaped detection, and could still escape in the near future.