Rare b→d decays in covariant confined quark model

• Published in: The European physical journal. A, Hadrons and nuclei Vol. 58; no. 3
• Main Authors: Soni, N. R., Issadykov, A., Gadaria, A. N., Patel, J. J., Pandya, J. N.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2022; Springer Nature B.V
• Subjects: Decay; Form factors; Hadrons; Heavy Ions; Momentum transfer; Nuclear Fusion; Nuclear Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Quark models; Quarks; Regular Article - Theoretical Physics
• ISSN: 1434-6001; 1434-601X
• DOI: 10.1140/epja/s10050-022-00685-y

In this article, we study the rare decays corresponding to b → d transition in the framework of the covariant confined quark model. The transition form factors for the channels B + ( 0 ) → ( π + ( 0 ) , ρ + ( 0 ) , ω ) and B s 0 → K ( ∗ ) 0 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 b → s to b → d rare decays using the inputs from previous papers on b → s ℓ + ℓ - 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 q 2 range as well as in q 2 bins [0.1–0.98] GeV 2 and [1.1–6] GeV 2 . We also compare our findings with different theoretical predictions.