Learn More
The aim of the paper is to make a comparison between the unitarity condition method and the standard version of the unitarity triangle approach by using as parameters four independent moduli |U ij |. This choice is motivated by the measurability property and leads to a simple criterion for the separation of unistochastic matrices from the double stochastic(More)
A novel method to obtain parameterizations of complex inverse orthogonal matrices is provided. These matrices are natural generalizations of complex Hadamard matrices which depend on non zero complex parameters. The method we use is via doubling the size of inverse complex conference matrices. When the free parameters take values on the unit circle the(More)
We test the positivity property of the chiral perturbation theory (ChPT) pion-pion scattering amplitudes within the Mandelstam triangle. In the one-loop approximation, O(p 4), the positivity constrains only the coefficients b 3 and b 4 , namely one obtains that b 4 and the linear combination b 3 + 3b 4 are positive quantities. The two-loops approximation(More)
By using an exact method to impose unitarity on the neutrino data we show that around the central values of the moduli of the PMNS matrix there is a continuous approximate unitary set of matrices, all of them being consistent with a maximal CP violation in the lepton sector, i.e. δ ≈ 90 • , over a wide range for Ve3 values.
We report on an exact method for global fits of the CKM matrix by using the necessary and sufficient conditions the data have to satisfy in order to find a unitary matrix compatible with them, and this method can be applied to both quark and lepton CKM matrices. The key condition writes −1 ≤ cos δ ≤ 1 where δ is the phase that encodes the CP violation, and(More)
We use in this paper an exact method to impose unitarity on moduli of the neutrino PMNS matrix recently determined, and show how one could obtain information on CP non-conservation from a limited experimental information. One suggests a novel type of global fit by expressing all the theoretical quantities in terms of convention independent parameters, the(More)
  • 1