2-3 symmetry: Flavor changing b, {tau} decays, and neutrino mixing

Journal Article · Thu Dec 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.113002· OSTI ID:20774418

Datta, Alakabha; O'Donnell, Patrick J ^[1]

---

1. Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON, M5S 1A7 (Canada)

The observed pattern of neutrino mixing may be the result of a 2-3({mu}-{tau}) 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 m{sub s}/m{sub b} and m{sub {mu}}/m{sub {tau}} in addition to the mass of the heavy Higgs boson of the second Higgs doublet. A Higgs boson mass of m{sub H}{approx}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 B{sub s}-B{sub s} mixing. The lepton flavor violating decays {tau}{yields}{mu}l(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 {approx}2 degrees.

• OSTI ID: 20774418
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
B QUARKS
CP INVARIANCE
FLAVOR MODEL
HIGGS BOSONS
HIGGS MODEL
LEPTONIC DECAY
MUONS
NEUTRAL CURRENTS
NEUTRINO OSCILLATION
NEUTRINOS
REST MASS
S QUARKS
STANDARD MODEL
SYMMETRY
SYMMETRY BREAKING
WEINBERG ANGLE