arXiv:0704.0627·v1·High Energy Physics — Phenomenology
Electromagnetic structure and weak decay of meson K in a light-front QCD-inspired
Fabiano P. Pereira (Instituto de Fisica, Universidade Federal Fluminense, Niteroi, RJ, Brazil)🇧🇷 · J. P. B. C. de Melo (Universidade Cruzeiro do Sul, CETEC, Sao Paulo, SP, Brazil)🇧🇷 · T. Frederico (Instituto Tecnologico de Aeronautica, Sao Jose dos Campos, SP, Brazil)🇧🇷 · Lauro Tomio (Instituto de Fisica Teorica, UNESP, Sao Paulo, SP, Brazil)🇧🇷
Abstract
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.
Comments: 4 pages and 1 figure eps. To appear Nucl. Phys. A (2007)