Phenomenological study of lepton mass matrix textures
نویسندگان
چکیده
منابع مشابه
A Phenomenological Study on Lepton Mass Matrix Textures
The three active light neutrinos are used to explain the neutrino oscillations. The inherently bi-large mixing neutrino mass matrix and the Fritzsch type, bi-small mixing charged lepton mass matrix are assumed. By requiring the maximal νμ − ντ mixing for the atmospheric neutrino problem and the masssquared difference approperiate for the almost maximal mixing solution to the solar neutrino prob...
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We propose simple phenomenological lepton mass matrices which describe the three neutrinos almost degenerate in mass, leading to a very large mixing angle between νμ and ντ , as consistent with a recent report on atmospheric neutrino oscillation from the Superkamiokande collaboration. Our matrix model also gives νe − νμ mixing in agreement with the value required for neutrino oscillation to exp...
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We review ideas for explaining the pattern of fermion masses and mixing angles based on a spontaneously broken family symmetry. 1 The form of the quark mass matrices. The fundamental parameters of the Standard Model or its supersymmetric extension that are responsible for fermion masses and mixings are the Yukawa couplings or,equivalently, the fermion mass matrix. Unfortunately we do not have s...
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In theories with three light neutrinos, certain simplicity assumptions allow the construction of a complete list of leading order lepton mass matrices. These matrices are consistent with m τ = 0, ∆m 2 12 ≪ ∆m 2 23 , θ 23 ∼ O(1) and θ 13 = 0, as suggested by measurements of atmospheric and solar neutrino fluxes. The list contains twelve generic cases: two have three degenerate neutrinos, eight h...
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The smallness and hierarchy in fermion parameters could be the result of selection rules due to an Abelian horizontal symmetry broken by a small parameter. When applied to the lepton sector, then for a large class of models, a number of interesting order of magnitude relations arise: with i < j, m(ν i)/m(ν j) ∼ sin 2 θ ij ; m(ℓ − i)/m(ℓ − j) < ∼ sin θ ij ; m(ν i)/m(ν j) > ∼ m 2 (ℓ − i)/m 2 (ℓ −...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2002
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.65.057303