Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-09-24
JHEP 0909:091,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
49 latex pages, 1 figure, final version in journal publication
Scientific paper
10.1088/1126-6708/2009/09/091
We suggest a model which addresses both the fermion mass hierarchy problem and the family problem in two-layer warped extra dimensions. In this model, 3 family fermions in 4 dimensions (4D) generate from 1 family in two-layer warped 6D by two step Kluza-Klein decompositions. The mass hierarchies are produced by the exponential behavior of 4D fermion zero mode profiles. The mixings and masses of fermions are closely related to the family problem. By adjusting parameters in this model, the numerical results can be very close to the experimental data both in the quark sector and in the lepton sector. In the lepton sector, we suppose neutrinos to be Dirac ones. The neutrino masses of sub-$\mathrm{eV}$ scale are obtained, and also CP violation emerges in the lepton sector.
Guo Zhi-Qiang
Ma Bo-Qiang
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