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Sum rules for B-->pi eta('), K eta('), eta(') eta(') decays
Rafel Escribano, Joaquim Matias, Javier Virto
We provide a set of sum rules, using flavour symmetries, relating CP-averaged ratios and CP asymmetries of different neutral and charged B mesons decaying into an eta(') particle t…
Determination of gamma and alpha from non-leptonic B decays with SU(3) flavour symmetry
Joaquim Matias
We describe in detail the method we have used to determine the CKM angles gamma, alpha and beta using flavour symmetries between non-leptonic B decays. This method is valid in the…
A Higgs or Not a Higgs?
C. P. Burgess, J. Matias, M. Pospelov
This talk summarizes a method for analyzing the properties of any new scalar particle, which is systematic in the sense that it minimizes apriori theoretical assumptions about the…
Low-energy neutrino-photon inelastic interactions
J. Matias
The computation of the polarized amplitudes and cross section of the processes , and is described. We used an effective lagrangian approac…
Five-leg photon-neutrino interactions
A. Abada, J. Matias, R. Pittau
In a first part, we justify the feasibility of substituting a photon leg by a neutrino current in the Euler-Heisenberg Lagrangian to obtain an effective Lagrangian for the process…
A fermiophobic SU(2)xSU(2)xU(1) extension of the Standard Model
J. Matias
A new type of gauge extension of the SM is proposed. It is based on a SU(2)xSU(2)xU(1) group with the peculiarity that the gauge bosons of the extra SU(2) do not couple to fermions…