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10 papers · 1 filter
Discontinuity Theorem for First Order Phase Transitions. Implications for QCD
A. Barducci, R. Casalbuoni, G. Pettini +1
A first order phase transition leading to deconfinement and chiral restoration is a likely possibility for QCD, at least in some region of the temperature-density plane. A signal f…
The Quantum Deformed Dirac Equation from the k-Poincare` Algebra
Anatol Nowicki, Emanuele Sorace, Marco Tarlini
In this letter we derive a deformed Dirac equation invariant under the k-Poincare` quantum algebra. A peculiar feature is that the square of the k-Dirac operator is related to the…
Effective Lagrangian for Heavy and Light Mesons: Semileptonic Decays
R. Casalbuoni, A. Deandrea, N. Di Bartolomeo F. Feruglio +2
We introduce an effective lagrangian including negative and positive parity heavy mesons containing a heavy quark, light pseudoscalars, and light vector resonances, with their allo…
Estimates with an Effective Chiral Lagrangian for Heavy Mesons
R. Casalbuoni, A. Deandrea, N. Di Bartolomeo +3
On the basis of an effective lagrangian incorporating approximate chiral symmetry and heavy-quark spin and flavor symmetries, and by use of information on leptonic decays, we estim…
Light Vector Resonances in the Effective Chiral Lagrangian for Heavy Mesons
R. Casalbuoni, A. Deandrea, N. Di Bartolomeo +3
We modify a chiral effective lagrangian recently suggested to describe interactions of the light pseudoscalars with mesons containing a heavy quark, so as to incorporate light vect…
The Extended Bess Model: Bounds from Precision Electroweak Measurements
R. Casalbuoni, A. Deandrea, S. De Curtis +4
We present an effective Lagrangian parameterization describing scalar, vector, and axial-vector bound states, originating from a strong breaking of the electroweak symmetry, based…