Light-Front Model of Transition Form-Factors in Heavy Meson Decay
J. P. B. C. de Melo, and T. Frederico (Laborat\'orio de F\'isica, Teorica e Computa\c{c}\~ao Cientifica, LFTC, Universidade Cruzeiro do Sul,, S\~ao Paulo, Brazil, Instituto de F\'isica Te\'orica, Universidade, Estadual Paulista, IFT-UNESP, S\~ao Paulo, Brazil, Dep. de F\'isica,
TL;DR
This paper calculates electroweak transition form factors for heavy meson decays using a light-front model, comparing results with experimental data and discussing potential improvements.
Contribution
It introduces a light-front framework for computing transition form factors in heavy meson decays and analyzes discrepancies with experimental data.
Findings
Model underestimates experimental data at higher momentum transfers.
Discussion of potential reasons for discrepancies.
Suggestions for improving the model.
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.
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