Abstract (EN):
In the framework of the chiral quark-soliton model of the nucleon we investigate the properties of the polarized quark distribution. In particular we analyse the so called anomalous difference between the representations for the quark distribution functions in terms of occupied and of non-occupied quark states. By an explicit analytical calculation it is shown that this anomaly is absent in the polarized isoscalar distribution Deltau + Deltad, which is ultraviolet finite. In the; case of the polarized isovector quark distribution Deltau - Deltad the anomaly can be cancelled by a Pauli-Villars subtraction which is also needed for the regularization of the ultraviolet divergence.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
23