Electromagnetic structure and weak decay of meson K in a light-front QCD-inspired model
Nuclear Physics A. Amsterdam: Elsevier B.V., v. 790, p. 610C-613C, 2007.
Universidade Federal Fluminense (UFF)
Univ Cruzeiro Sul
Instituto Tecnológico de Aeronáutica (ITA)
Universidade Estadual Paulista (Unesp)
The kaon electromagnetic (e.m.) form factor is reviewed considering a light-front constituent quark model. In this approach, it is discussed the relevance of the quark-antiquark pair terms for the full covariance of the e.m. current. It is also verified, by considering a QCD dynamical model, that a good agreement with experimental data can be obtained for the kaon weak decay constant once a probability of about 80% of the valence component is taken into account.