Universality limits on bulk fermions

2000/08/31 by F. del Aguila, J. Santiago · 5 citations
Physics and Astronomy · #Ansatz #Dirac fermion #Electroweak interaction #Fermion #Flavour #Mixing (physics) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Universality (dynamical systems) #Yukawa potential #hep-ph

paper · pdf · doi:10.1016/s0370-2693(00)01110-2

published as Phys.Lett. B493 (2000) 175-181 · 12 pages, 1 figure, few typos corrected, reference added, version to appear in PLB

arxiv created 2000/10/03 · openalex publication_date 2000/11/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The Kaluza-Klein fermion excitations induce mixing between the Standard Model fermions and loss of universality. The flavour mixing not present in the Standard Model can be made to vanish aligning the Yukawa couplings and the Dirac masses of the heavy modes, but universality is only recovered when these masses go to infinity. This implies a bound on the lightest new heavy quark, M1 \~ 3-5 TeV, which together with the electroweak precision data limits will allow the Large Hadron Collider to provide a crucial test of the Randall-Sundrum ansatz for solving the gauge hierarchy.

Citations

• Quarks and leptons beyond the third generation
• Large Mass Hierarchy from a Small Extra Dimension
• The Hierarchy Problem and New Dimensions at a Millimeter

Cited by

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• Collider signals of top quark flavor violation from a warped extra dimension
• Light Higgs boson discovery from fermion mixing
• Particle-antiparticle mixing, CP violation and rare K and B decays in a minimal theory of fermion masses
• The impact of Kaluza-Klein fermions on Standard Model fermion couplings in a RS model with custodial protection