arXiv:1003.2132·v1·High Energy Physics — Phenomenology
Light-Front Model of Transition Form-Factors in Heavy Meson Decay
J. P. B. C. de Melo🇧🇷 · T. Frederico (Laboratório de Física Teorica e Computação Cientifica, LFTC, Universidade Cruzeiro do Sul, São Paulo, Brazil and Instituto de Física Teórica, Universidade Estadual Paulista, IFT-UNESP, São Paulo, Brazil, Dep. de Física, Instituto Tecnológico de Aeronáutica, São José dos Campos, Brazil.)🇧🇷
Abstract
Electroweak transition form factors of heavy meson decays are important ingredients in the extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements from experimental data. In this work, within a light-front framework, we calculate electroweak transition form factor for the semileptonic decay of mesons into a pion or a kaon. The model results underestimate in both cases the new data of CLEO for the larger momentum transfers accessible in the experiment. We discuss possible reasons for that in order to improve the model.
Comments: Paper with 5 pages and 2 eps figures. To appear to Nuclear Physics B. Talk at Light Cone 2009: Relativistic Hadronic and Particle Physics (LC 2009), Sao Jose dos Campos, S.P, Brazil, 8-13 Jul 2009.