https://doi.org/10.1140/epjc/s10052-025-13783-0
Regular Article - Theoretical Physics
Weak decays of 
involving vector mesons in self-consistent covariant light-front approach
1
Department of Physics and Nanotechnology, SRM Institute of Science and Technology, 603203, Kattankulathur, India
2
Paradigm of Science Cultivation and Ingenious, 176032, Kangra, India
Received:
6
October
2024
Accepted:
30
December
2024
Published online:
20
February
2025
We present a comprehensive analysis of weak transition form factors, semileptonic decays, and nonleptonic decays of 
mesons involving pseudoscalar (P) and vector (V) mesons for bottom-conserving and bottom-changing decay modes. We employ the self-consistent covariant light-front quark model (CLFQM), termed type-II correspondence, to calculate the to P(V) transition form factors. The type-II correspondence in the CLF approach gives self-consistent results associated with the 
functions, which vanish numerically after the replacement 
in traditional type-I correspondence, and the covariance of the matrix elements is also restored. We investigate these effects on bottom-conserving to P(V) form factors that have not yet been studied in CLFQM type-II correspondence. In addition, we quantify the implications of self-consistency propagating to weak decays involving both bottom-conserving and bottom-changing transition form factors. We use two different parameterizations, the usual three-parameter function of 
and the model-independent z-series expansion, to establish a clear understanding of dependence. Using the numerical values of the form factors, we predict the branching ratios other physical observables, including forward-backward asymmetries, polarization fractions, etc. of the semileptonic decays. Subsequently, we predict the branching ratios of two-body nonleptonic weak decays using the factorization hypothesis in self-consistent CLFQM. We also compare our results with those of other theoretical studies.
© The Author(s) 2025
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3.
