5 papers
Larger physical volume with a noncompact lattice regularization of SU(N) theories
Giuseppe Di Carlo, Fabrizio Palumbo, Roberto Scimia
Recently it has been found that in a noncompact formulation of the SU(2) gauge theory on a lattice the physical volume is larger than in the Wilson theory with the same number of s…
The pion_0 to gamma gamma decay and the chiral anomaly in the quark-composites approach to QCD
Sergio Caracciolo, Fabrizio Palumbo
We evaluate the pion_0 into two gammas decay amplitude by an effective action derived from QCD in the quark composites approach, getting the standard value. We also verify that our…
Lattice QCD and chiral mesons
Sergio Caracciolo, Fabrizio Palumbo, Roberto Scimia
The standard QCD action is improved by the addition of irrelevant operators built with chiral composites. An effective Lagrangian is derived in terms of auxiliary fields, which has…
Quark-composites approach to QCD
Sergio Caracciolo, Gianni De Franceschi, Fabrizio Palumbo
We present a perturbative approach to QCD based on quark composites, that is barions and mesons, as fundamental variables.
Lower scaling dimensions of quarks and gluons and new energy scales
F. Palumbo
We consider the possibility that quarks and gluons, due to confinement, have lower scaling dimensions. In such a case there appear naturally new energy scales below which the stand…