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44 papers · 2 filters
Field theory description of vacuum replicas
A. V. Nefediev, J. E. F. T. Ribeiro
In this paper we develop a systematic quantum field theory based approach to the vacuum replica recently found to exist in effective low energy models in hadronic physics. A local…
Relativistic Quark Model Calculation of the l1, l2 Coefficients of the Chiral Lagrangian
Felipe J. Llanes-Estrada, Pedro Bicudo
We briefly report on a relativistic quark model scheme to calculate the O(P^4) pion-pion vertex in the planar approximation and in the chiral limit. The calculation is reduced to t…
Quantum field theory approach to the vacuum replica in QCD
A. V. Nefediev, J. E. F. T. Ribeiro
Quantum field theory is used to describe the contribution of possible new QCD vacuum replica to hadronic processes. This sigma-like new state has been recently shown to be likely t…
Hierarchy plus anarchy in quark masses and mixings
J. A. Aguilar-Saavedra
We introduce a new parameterisation of the effect of unknown corrections from new physics on quark and lepton mass matrices. This parameterisation is used in order to study how the…
Removing Ambiguities in the Neutrino Mass Matrix
G. C. Branco, R. Gonzalez Felipe, F. R. Joaquim +1
We suggest that the weak-basis independent condition det(M_nu)=0 for the effective neutrino mass matrix can be used in order to remove the ambiguities in the reconstruction of the…
Maximal atmospheric neutrino mixing in an SU(5) model
W. Grimus, L. Lavoura
We show that maximal atmospheric and large solar neutrino mixing can be implemented in SU(5) gauge theories, by making use of the symmetry associated with a suitably defin…