Neutrino mixing: A4 variations
نویسندگان
چکیده
منابع مشابه
Neutrino Tribimaximal Mixing from A4 Alone
Neutrino tribimaximal mixing is obtained from the breaking of A4 to Z3 in the charged-lepton sector and to Z2 in the neutrino sector. To enforce this conflicting pattern, extra particles and symmetries are usually invoked, often accompanied by nonrenormalizable interactions and even extra dimensions. It is shown here in a specific renormalizable model how A4 alone will accomplish this, with onl...
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S. Morisi, ∗ D. V. Forero, † J. C. Romão, ‡ and J. W. F. Valle § Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074 Würzburg, Germany Departamento de F́ısica and CFTP, Instituto Superior Técnico Technical University of Lisbon,1049-001 Lisboa, Portugal AHEP Group, Institut de F́ısica Corpuscular – C.S.I.C./Universitat de València Edificio Institutos de Paterna, Apt 22085...
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I propose a model of radiative charged-lepton and neutrino masses with A4 symmetry. The soft breaking of A4 to Z3 lepton triality is accomplished by dimension-three terms. The breaking of Z3 by dimension-two terms allows cobimaximal neutrino mixing (θ13 6= 0, θ23 = π/4, δCP = ±π/2) to be realized with only very small finite calculable deviations from the residual Z3 lepton triality. This constr...
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We formulate and discuss a 4-dimensional SUSY version of an A4 model for tribimaximal neutrino mixing which is completely natural. We also study the next-tothe-leading corrections and show that they are small, once the ratios of A4 breaking VEVs to the cutoff are fixed in a specified interval. We also point out an interesting way of presenting the A4 group starting from the modular group. In th...
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We present a see-saw A4 model for Tri-Bimaximal mixing which is based on a very economical flavour symmetry and field content and still possesses all the good features of A4 models. In particular the charged lepton mass hierarchies are determined by the A4 × Z4 flavour symmetry itself without invoking a Froggatt-Nielsen U(1) symmetry. Tri-Bimaximal mixing is exact in leading order while all the...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2016
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2015.11.049