a review of the advances of an effective model of qcd at low energies

OSVALDO CIVITARESE; P. O. HESS

Revista Mexicana de Fisica

Año: 2006 vol. 52 p. 80 - 80

The properties of the non-perturbative vacuum of QCD are modelledwithin the framework of a bosonized QCD Hamiltonian. TheHamiltonian includes fermion (valence quarks and quark-antiquarkpairs) and bosons (pairs of gluons) interacting via effectiveinteractions. The couplings between these degrees of freedom arefixed from the phenomenology and the Hamiltonian is transformedinto a boson basis to map quark-antiquark pairs and pairs ofgluons. With these elements we calculate the parameters whichdefine gluon and fermion condensates and compare their values withthe ones obtained by applying sum rule techniques. The agreementbetween the results is rather good, in spite of the simplicity ofthe model.