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17 papers · 2 filters
Chiral Perturbation Theory and Unitarization
E. Ruiz Arriola, A. Gómez Nicola, J. Nieves +1
We review our recent work on unitarization and chiral perturbation theory both in the and the sectors. We pay particular attention to the Bethe-Salpeter and Inverse Ampli…
Large top mixing from extra dimensions
F. del Aguila, J. Santiago
Fermion mixing is conveniently described using the effective Lagrangian formalism. We apply this approach to study top mixing in models with an infinite tower of Kaluza-Klein fermi…
Top mixing in effective theories
F. del Aguila, J. Santiago
We review how top mixing with light quarks constrains new physics beyond the Standard Model using the effective Lagrangian approach.
Charged Lepton Flavour Violation from Massive Neutrinos in Z Decays
J. I. Illana, T. Riemann
Present evidences for neutrino masses and lepton flavour mixings allow to predict, in the Standard Model with light neutrinos, branching rates for the decays Z --> e mu, mu tau, e…
Epsilon'/Epsilon in the Chiral Limit using Large N_c
Johan Bijnens, Joaquim Prades
The K to pi pi system is analyzed in the chiral limit and at NLO in 1/N_c. The Delta I = 1/2 rule is reproduced and we obtain a large value for epsilon' / epsilon.
Unitarity triangles and geometrical description of CP violation with Majorana neutrinos
J. A. Aguilar-Saavedra, G. C. Branco
We generalize the geometrical description of CP violation in the Standard Model in terms of a unitarity triangle. For three left-handed Majorana neutrinos CP violation in the lepto…