Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approach
Abstract We present a comprehensive analysis of weak transition form factors, semileptonic decays, and nonleptonic decays of $$B_c$$ B c mesons involving pseudoscalar (P) and vector (V) mesons for bottom-conserving and bottom-changing decay modes. We employ the self-consistent covariant light-front...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13783-0 |
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| Summary: | Abstract We present a comprehensive analysis of weak transition form factors, semileptonic decays, and nonleptonic decays of $$B_c$$ B c 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 $$B_c$$ B c to P(V) transition form factors. The type-II correspondence in the CLF approach gives self-consistent results associated with the $$B^{(i)}_j$$ B j ( i ) functions, which vanish numerically after the replacement $$M^{\prime (\prime \prime )} \rightarrow M_0^{\prime (\prime \prime )}$$ M ′ ( ″ ) → M 0 ′ ( ″ ) in traditional type-I correspondence, and the covariance of the matrix elements is also restored. We investigate these effects on bottom-conserving $$B_c$$ B c 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 $$B_c$$ B c transition form factors. We use two different parameterizations, the usual three-parameter function of $$q^{2}$$ q 2 and the model-independent z-series expansion, to establish a clear understanding of $$q^{2}$$ q 2 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 $$B_c$$ B c 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. |
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| ISSN: | 1434-6052 |