Determining the heavy seesaw neutrino mass matrix from low-energy parameters
Xiao-Gang He, Sandy SC Law, Raymond R Volkas
PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2008
We explore how the seesaw sector in neutrino mass models may be constrained through symmetries to be completely determined in terms of low-energy mass, mixing angle and CP-violating phase observables. The key ingredients are intrafamily symmetries to determine the neutrino Dirac mass matrix in terms of the charged-lepton or quark mass matrices, together with interfamily or flavor symmetries to determine diagonalization matrices. Implications for leptogenesis and collider detection of heavy neutral leptons are discussed. We show that leptogenesis can succeed in small regions of parameter space for the case where the neutrino Dirac mass matrix equals the up-quark mass matrix. The model where t..View full abstract
S. S. C. L. and R. R. V. thank Nicole Bell for discussions. X. G. H. would like to thank KITPC for hospitality where part of this work was done. This work was supported in part by the Australian Research Council, the Commonwealth of Australia, the NSC, and NCTS.