Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-05-24
Phys. Rev. D82: 075006,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 2 figures; v2: discussion on sparticle mass spectrum included, 27 pages, 2 figures
Scientific paper
We propose a non-universal U(1)'_F symmetry combined with the Minimal Supersymmetric Standard Model. All anomaly cancellation conditions are satisfied without exotic fields other than three right-handed neutrinos. Because our model allows all three generations of chiral superfields to have different U(1)'_F charges, upon the breaking of the U(1)'_F symmetry at a low scale, realistic masses and mixing angles in both the quark and lepton sectors are obtained. In our model, neutrinos are predicted to be Dirac fermions and their mass ordering is of the inverted hierarchy type. The U(1)'_F charges of the chiral super-fields also naturally suppress the mu term and automatically forbid baryon number and lepton number violating operators. While all flavor-changing neutral current constraints in the down quark and charged lepton sectors can be satisfied, we find that constraint from D0-D0bar turns out to be much more stringent than the constraints from the precision electroweak data.
Chen Mu-Chun
Huang Jinrui
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