Nearly bimaximal neutrino mixing, muon g{minus}2 anomaly, and lepton-flavor-violating processes
We interpret the newly observed muon g{minus}2 anomaly in the framework of a leptonic Higgs doublet model with nearly degenerate neutrino masses and nearly bimaximal neutrino mixing. Useful constraints are obtained on the rates of lepton-flavor-violating rare decays {tau}{r_arrow}{mu}{gamma}, {mu}{r_arrow}e{gamma} and {tau}{r_arrow}e{gamma} as well as the {mu}-e conversion ratio R{sub {mu}e}. We find that {Gamma}({mu}{r_arrow}e{gamma}), {Gamma}({tau}{r_arrow}e{gamma}) and R{sub {mu}e} depend crucially on possible nonzero but small values of the neutrino mixing matrix element V{sub e3}, and they are also sensitive to the Dirac-type CP-violating phase. In particular, we show that {Gamma}({tau}{r_arrow}{mu}{gamma})/m{sub {tau}}{sup 5}, {Gamma}({mu}{r_arrow}e{gamma})/m{sub {mu}}{sup 5} and {Gamma}({tau}{r_arrow}e{gamma})/m{sub {tau}}{sup 5} are approximately in the ratio 1:2{vert_bar}V{sub e3}{vert_bar}{sup 2}:2{vert_bar}V{sub e3}{vert_bar}{sup 2} if {vert_bar}V{sub e3}{vert_bar} is much larger than O(10{sup {minus}2}), and in the ratio 2({Delta}m{sub atm}{sup 2}){sup 2}:({Delta}m{sub sun}{sup 2}){sup 2}:({Delta}m{sub sun}{sup 2}){sup 2} if {vert_bar}V{sub e3}{vert_bar} is much lower than O(10{sup {minus}3}), where {Delta}m{sub atm}{sup 2} and {Delta}m{sub sun}{sup 2} are the corresponding mass-squared differences of atmospheric and solar neutrino oscillations.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204502
- Journal Information:
- Physical Review D, Vol. 64, Issue 1; Other Information: DOI: 10.1103/PhysRevD.64.017304; Othernumber: PRVDAQ000064000001017304000001; 008115PRD; PBD: 1 Jul 2001; ISSN 0556-2821
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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