[en] Short communication. 3 refs

[en] The paper considers a hypothetical light gauge boson X that couples only to quarks with mass so as to prevent decays through hadronic channels and calculate its decay width in e⁺e^- studying the mixed X-γ propagator. In order to reduce the uncertainties due to light quark masses, the calculation is repeated using a dispersion relation relating the width to experimentally measured quantities

[en] Supersymmetry implies the existence of light, spin-1/2 partners for gluons and the photon, and semistrongly interacting massless goldstone bosons. We discuss here the constraints which can be placed on the masses and properties of these particles, and the consequences which flow from their existence. Although searching for the R-goldstone bosons should be quite easy, they are in fact not in conflict with present observations

[en] A calculation is outlined and results presented for the electric form factor, measured at two values of the momentum, of the pseudo-Goldstone meson within the staggered formulation of lattice fermions

[en] The interactions between Teller, Renner, Jahn and Landau which led to the formulation of the Jahn-Teller effect are discussed. The applicability of Jahn-Teller type of theory to superconductivity and the explanation proposed by the use of Goldstone particles are assessed

[en] The role played by Goldstone bosons in some radiative corrections to the standard model and its relation to nondecoupling is discussed. A very simple effective Lagrangian is written, wherein the dependence on Goldstone dynamics is emphasized, with a view to a model-independent analysis of the data

No abstract available

[en] The Goldstone-fermion interaction in the standard model is examined. We show that massless fermions still couple to Goldstone particles. An application in the technicolor model shows that electronlike quarks should couple to pions

[en] In warm inflation models there is the requirement of generating large dissipative couplings of the inflation with radiation, while at the same Âătime, not de-stabilising the flatness of the inflation potential due to radiative corrections. One way to achieve this without fine tuning unrelated couplings is by supersymmetry. In this talk we will discuss warm inflation with Pseudo-Nambu-Goldstone Bosons (PNGB). In this case inflation and other light fields are PNGB. So, the radiative corrections to the potential are suppressed and the thermal Âăcorrections are small as long as the temperature is below the symmetry breaking scale. In such models it is possible to fulfill the contrary requirements of an inflation potential which is stable under radiative corrections and the generation of a large dissipative coupling of the inflation field with other light fields. This warm inflation model with PNGB gives the observed CMB-anisotropy amplitude and spectral index having the symmetry breaking scale at the GUT scale. (author)

[en] Expressing hydrodynamics in terms of the flow of vorticity, using the vortex current tensor, helps unify the picture of turbulent channel flow for viscous fluids and for superfluids. In both, eddy viscosity plays a major role in energy dissipation, and in both there is a similar cross stream flow of vorticity, which in the case of superfluids leads to the Josephson frequency. The vortex current tensor, which was introduced in an earlier paper to derive an exact three dimensional Magnus effect formula, turns out to be the classical hydrodynamic limit of the vortex current that is the source for a classical Goldstone-boson field