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On Non-Unitary Lepton Mixing and Neutrino Mass Observables
Werner Rodejohann
There are three observables related to neutrino mass, namely the kinematic mass in direct searches, the effective mass in neutrino-less double beta decay, and the sum of neutrino m…
Flavor Composition of UHE Neutrinos at Source and at Neutrino Telescopes
Sandhya Choubey, Werner Rodejohann
We parameterize the initial flux composition of high energy astrophysical neutrinos as (Phi_e^0 : Phi_mu^0 : Phi_tau^0) = (1 : n : 0), where n characterizes the source. All usually…
Large U_{e3} and Tri-bimaximal Mixing
Srubabati Goswami, Serguey Petcov, Shamayita Ray +1
We investigate in a model-independent way to what extent one can perturb tri-bimaximal mixing in order to generate a sizable value of |U_{e3}|, while at the same time keeping solar…
Minimal Textures in Seesaw Mass Matrices and their low and high Energy Phenomenology
Srubabati Goswami, Subrata Khan, Werner Rodejohann
In an attempt to find minimal scenarios we study the implications of Dirac and Majorana mass matrices with texture zeros within the type I seesaw mechanism. For the Dirac mass matr…
Scaling in the Neutrino Mass Matrix, mu-tau Symmetry and the See-Saw Mechanism
Anjan S. Joshipura, Werner Rodejohann
The scaling hypothesis postulates proportionality of two columns of the Majorana neutrino mass matrix in the flavor basis. This Ansatz was shown to lead to an inverted hierarchy an…
Non-Unitary Lepton Mixing Matrix, Leptogenesis and Low Energy CP Violation
Werner Rodejohann
It is well-known that for unflavored leptogenesis there is in general no connection between low and high energy CP violation. We stress that for a non-unitary lepton mixing matrix…
Golden Ratio Prediction for Solar Neutrino Mixing
Adisorn Adulpravitchai, Alexander Blum, Werner Rodejohann
It has recently been speculated that the solar neutrino mixing angle is connected to the golden ratio phi. Two such proposals have been made, cot theta_{12} = phi and cos theta_{12…
Deviations from tri-bimaximal mixing
Werner Rodejohann
Current data indicates that lepton mixing is very close to the tri-bimaximal mixing scenario. In general, however, one expects deviations from any mixing scenario. We discuss sever…