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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| Language: | English |
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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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| author | Thejus Mary S. Avijit Hazra Neelesh Sharma Rohit Dhir |
| author_facet | Thejus Mary S. Avijit Hazra Neelesh Sharma Rohit Dhir |
| author_sort | Thejus Mary S. |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-e0b9312cc71f42b795fdf30c9ffd5298 |
| institution | OA Journals |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-e0b9312cc71f42b795fdf30c9ffd52982025-08-20T02:15:12ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-02-0185214810.1140/epjc/s10052-025-13783-0Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approachThejus Mary S.0Avijit Hazra1Neelesh Sharma2Rohit Dhir3Department of Physics and Nanotechnology, SRM Institute of Science and TechnologyDepartment of Physics and Nanotechnology, SRM Institute of Science and TechnologyParadigm of Science Cultivation and IngeniousDepartment of Physics and Nanotechnology, SRM Institute of Science and TechnologyAbstract 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.https://doi.org/10.1140/epjc/s10052-025-13783-0 |
| spellingShingle | Thejus Mary S. Avijit Hazra Neelesh Sharma Rohit Dhir Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approach European Physical Journal C: Particles and Fields |
| title | Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approach |
| title_full | Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approach |
| title_fullStr | Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approach |
| title_full_unstemmed | Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approach |
| title_short | Weak decays of $${\varvec{B}}_{{\varvec{c}}}$$ B c involving vector mesons in self-consistent covariant light-front approach |
| title_sort | weak decays of varvec b varvec c b c involving vector mesons in self consistent covariant light front approach |
| url | https://doi.org/10.1140/epjc/s10052-025-13783-0 |
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