2005/08/31 by Alakabha Datta, Patrick J. O'Donnell, Patrick O’Donnell · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.72.113002
published as Phys.Rev. D72 (2005) 113002 · 21 pages, no figures. Reorganization and addition of text. Reference added and misprints corrected. Conclusions unchanged. Accepted for publication
arxiv created 2005/11/23 · openalex publication_date 2005/12/15 · arxiv updated 2009/12/01 · openalex created_date 2016/09/30 · openalex updated_date 2026/07/28
The observed pattern of neutrino mixing may be the result of a 2-3(\ensuremathμ\ensuremath-\ensuremathτ) symmetry in the leptonic sector. We consider a two Higgs doublet model with a 2-3 symmetry in the down-type quark and the charged lepton sector. The breaking of the 2-3 symmetry by the strange quark mass and the muon mass leads to flavor changing neutral currents in the quark sector and the charged lepton sector that are suppressed by ms/mb and m_\ensuremathμ/m_\ensuremathτ in addition to the mass of the heavy Higgs boson of the second Higgs doublet. A Higgs boson mass of mH\ensuremath∼600--900 GeV can explain the deviation from the standard model reported in several rare B decays. Predictions for other B decays are made, and a new CP phase is predicted in Bs\ensuremath-Bs mixing. The lepton flavor violating decays \ensuremathτ\ensuremath→\ensuremathμl(q)l(q) are below the experimental limits. The breaking of 2-3 symmetry in the lepton sector can lead to deviations of the atmospheric neutrino mixing angle from the maximal value by \ensuremath∼2 degrees.