$$B_{(s)}$$ B ( s ) to light tensor meson form factors via LCSR in HQEFT with applications to semileptonic decays
| Autor: | Ying-Hui Kou, Yan Chen, Wen Ling, Ya-Bing Zuo, Bo Yu, Chong-Xing Yue |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Quark Particle physics Physics and Astronomy (miscellaneous) Meson Flavor-changing neutral current High Energy Physics::Phenomenology lcsh:Astrophysics Type (model theory) Light cone lcsh:QB460-466 Effective field theory lcsh:QC770-798 High Energy Physics::Experiment lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Tensor Engineering (miscellaneous) Charged current |
| Zdroj: | European Physical Journal C: Particles and Fields, Vol 81, Iss 1, Pp 1-15 (2021) European Physical Journal |
| ISSN: | 1434-6052 1434-6044 |
| Popis: | In the present work, the form factors of $$B_{(s)}$$ B ( s ) to light P-wave tensor mesons ($$a_2(1320)$$ a 2 ( 1320 ) , $$K^*_2(1430)$$ K 2 ∗ ( 1430 ) , $$f_2(1270)$$ f 2 ( 1270 ) , $$f^\prime _2(1525)$$ f 2 ′ ( 1525 ) ) are calculated via the light cone sum rules (LCSR) in the framework of heavy quark effective field theory (HQEFT). Firstly, the expressions of form factors in terms of the light cone distribution amplitudes (DAs) of tensor mesons are derived via the LCSR at the leading order of heavy quark expansion. It is found that the penguin type form factors can be obtained directly from the corresponding semileptonic ones, which is similar to the case of S-wave mesons. Considering the light tensor meson DAs to twist-3, we give the numerical results of form factors systematically. As applications, we investigate the branching ratios, longitudinal polarization fractions and forward-backward asymmetries of relevant semileptonic decays induced by charged current and flavor changing neutral current (FCNC) separately. Our results may be tested by more precise experiments in the future. |
| Databáze: | OpenAIRE |
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