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Generation of neutrino mass textures from concrete realizations of and apos; and apos;Randall-Sundrum and apos; and apos; scenarios (based on the existence of an extra dimension and solving the gauge

Objective

The recent renewed interest for physics of extra dimensions, providing new types of solutions to the gauge-hierarchy problem, has also lead to new approaches of the Standard Model fermion mass hierarchy problem. Hence, we plan to study, from a theoretical poi nt of view, constraints on fermion mass matrices, with special emphasis on interesting variations of the ''Randall-Sundrum'' model (based on a non-factorisable metric) which can solve both the gauge and fermion mass hierarchy problems. In those versions of the Randall-Sundrum scenario, either certain or all(except the Higgs boson) of the Standard Model particles reside inside the five-dimensional bulk. Moreover, we plan to construct all the possible concrete realizations of such Randall-Sundrum models, using the present experimental data on quark/lepton masses and mixing angles (including the last results from neutrino oscillation observations). Finally, based on the obtained realizations of Randall-Sundrum models, we plan to discuss quantitatively the fine-tuning of fundamental parameters, and to determine the predictions on neutrino mass spectrum and leptonic mixing angletheta_13 (which is weakly constrained by the present experimental data).

Call for proposal

FP6-2002-MOBILITY-5
See other projects for this call

Coordinator

INSTITUTO SUPERIOR TECNICO
Address
Av. Rovisco Pais
Lisboa
Portugal