We study the phenomenology of supersymmetric models that explain neutrino masses through the spontaneous breaking of R-parity, finding strong correlations between the decays of the lightest neutralino and the neutrino mixing angles. In addition, the existence of a Goldstone boson, usually called Majoron (J), completely modifies the phenomenology with respect to the standard picture, inducing la...

We derive model-independent constraints on Higgs mass and couplings from the present LEP1 data samples and discuss the prospects for detecting the associated signals for higher masses, accessible at LEP2. This work is motivated by the fact that, in many extensions of the standard model, the Higgs boson can have substantial " invisible " decay modes, for example, into light or massless weakly in...

We implement a three-body confinement force, introduced on an algebraic basis, into a semirelativistic version of the Goldstone-boson-exchange constituent quark model. By solving the Faddeev equations we show that this interaction can increase the gap between singlet and colour states, such as the latter can be ignored and the known baryons can be described as q3 systems. We analyze the effect ...

We present a lattice Monte Carlo simulation for the evaluation of the spectrum of a confining Yang-Mills theory without Goldstone boson. We show that this theory is a very good candidate for describing composite weak bosons. In order to perform the spectrum analysis we have used standard lattice QCD Monte Carlo methods. We have also developed an efficient method to evaluate the mass of the pseu...

It is shown from rigorous three-body Faddeev calculations that the masses of all 14 lowest states in the N and ∆ spectra can be described within a constituent quark model with a Goldstone-boson-exchange interaction plus linear confinement between the constituent quarks. PACS numbers 12.39.-x, 12.38.Lg, 12. 40.Yx, 14.20.Gk Submitted to Physics Letters B Preprint UNIGRAZ-UTP 27-01-96

How the bulk of Universe's visible mass emerges and how it is manifest in existence properties hadrons are profound questions that probe into heart strongly interacting matter. Paradoxically, lightest pseudoscalar mesons appear to be key further understanding emergent structure mechanisms. These mesons, namely pion kaon, Nambu-Goldstone boson modes QCD. Unravelling their partonic interplay betw...

We study the η → 2γ decay using an extended three-flavor Nambu-Jona-Lasinio model that includes the 't Hooft instanton induced interaction. The η meson mass and the η → 2γ decay width are reproduced simultaneously with a rather strong instanton induced interaction. The calculated η decay constant is f η = 2.23f π and it suggests that the η meson is no longer the Goldstone boson.

The lattice Schwinger model with SLAC fermions is analyzed with two methods: a Hartree-Fock calculation of the ground state wavefunction, and a weak coupling approximation involving a truncated SLAC derivative. It is shown that $ Goldstone boson of chiral symmetry is actually present, but in the weak coupling limit it acquires infinite velocity. Submitted to Nuclear Physics B * Work supported b...

I give a review on the self-tuning solution[1] of the cosmological constant in a 5D RS-II model using a three index antisymmetric tensor field AMNP . The three index antisymmetric tensor field can be the fundamental one appearing in 11D supergravity. Also, the dual of its field strength HMNPQ, being a massless scalar, may be interpreted as a Goldstone boson of some spontaneously broken global s...