Study of the semileptonic decays $Υ(1S)\to B_{(c)}\ell\barν_\ell$
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| Format: | Preprint |
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2024
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| _version_ | 1866912105221849088 |
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| author | Tran, Chien-Thang Ivanov, Mikhail A. Santorelli, Pietro Tran, Hai-Cat |
| author_facet | Tran, Chien-Thang Ivanov, Mikhail A. Santorelli, Pietro Tran, Hai-Cat |
| contents | We study the exclusive semileptonic decays $Υ(1S)\to B_{(c)}\ell\barν_\ell$, where $\ell = e,μ,τ$. The relevant hadronic form factors are calculated using the Covariant Confined Quark Model developed previously by our group. We predict the branching fractions $\mathcal{B}(Υ(1S)\to B_{(c)}\ell\barν_\ell)$ to be of the order of $10^{-13}$ and $10^{-10}$ for the case of $B$ and $B_c$, respectively. Our predictions agree well with other theoretical calculations. We also consider the effects of possible New Physics in the case of $Υ(1S)\to B_cτ\barν_τ$. We show that the branching fraction of this decay can be enhanced by an order of magnitude using constraints from the $B\to D^{(*)}\ell\barν_\ell$ and $B_c\to J/ψ\ell \barν_\ell$ experimental data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2408_13776 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Study of the semileptonic decays $Υ(1S)\to B_{(c)}\ell\barν_\ell$ Tran, Chien-Thang Ivanov, Mikhail A. Santorelli, Pietro Tran, Hai-Cat High Energy Physics - Phenomenology We study the exclusive semileptonic decays $Υ(1S)\to B_{(c)}\ell\barν_\ell$, where $\ell = e,μ,τ$. The relevant hadronic form factors are calculated using the Covariant Confined Quark Model developed previously by our group. We predict the branching fractions $\mathcal{B}(Υ(1S)\to B_{(c)}\ell\barν_\ell)$ to be of the order of $10^{-13}$ and $10^{-10}$ for the case of $B$ and $B_c$, respectively. Our predictions agree well with other theoretical calculations. We also consider the effects of possible New Physics in the case of $Υ(1S)\to B_cτ\barν_τ$. We show that the branching fraction of this decay can be enhanced by an order of magnitude using constraints from the $B\to D^{(*)}\ell\barν_\ell$ and $B_c\to J/ψ\ell \barν_\ell$ experimental data. |
| title | Study of the semileptonic decays $Υ(1S)\to B_{(c)}\ell\barν_\ell$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2408.13776 |