https://doi.org/10.1140/epja/s10050-022-00685-y
Regular Article - Theoretical Physics
Rare 
decays in covariant confined quark model
1
Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, 390002, Vadodara, Gujarat, India
2
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980, Dubna, Russia
3
The Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan, 050032, Almaty, Kazakhstan
4
Al-Farabi Kazakh National University, 050040, Almaty, Kazakhstan
5
Applied Physics Department, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, 390001, Vadodara, Gujarat, India
e
jnpandya-apphy@msubaroda.ac.in
Received:
2
December
2021
Accepted:
11
February
2022
Published online:
1
March
2022
In this article, we study the rare decays corresponding to transition in the framework of the covariant confined quark model. The transition form factors for the channels 
and 
are computed in the entire dynamical range of momentum transfer squared. Using the form factors, we compute the branching fractions of the rare decays and our results are found to be matching well with the experimental data. We also compute the ratios of the branching fractions of the 
to rare decays using the inputs from previous papers on 
using this model. Further, using the form factors, model dependent and independent parameters, we also compute different other physical observables such as forward backward asymmetry, longitudinal polarization and angular observables in the entire 
range as well as in bins [0.1–0.98] GeV
and [1.1–6] GeV. We also compare our findings with different theoretical predictions.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
