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arXiv 2311.04431hep-ph
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在协变光前方法中$ψ(1S,2S)$和$η_{c}(1S,2S)$到$D_{(s)}$的半轻子和非轻子弱衰变

Semileptonic and nonleptonic weak decays of $ψ(1S,2S)$ and $η_{c}(1S,2S)$ to $D_{(s)}$ in the covariant light-front approach

Zhi-Jie Sun, Zhi-Qing Zhang, You-Ya Yang, Hao Yang

备注：
26 pages, 4 figures
发表信息：
Eur.Phys.J.C 84, 65 (2024)
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AI总结：

本文在协变光前夸克模型中研究了$ψ(1S,2S)$和$η_{c}(1S,2S)$到$D_{(s)}$的弱衰变，预测了分支比等物理观测量，发现部分衰变道的分支比达$\mathcal{O}(10^{-9})$量级，有望在未来高亮度实验中观测。

摘要：

除强和电磁衰变模式外，$ψ(1S,2S)$和$η_{c}(1S,2S)$也能通过弱相互作用衰变。这类弱衰变可被高亮度重味实验探测。目前，部分半轻子和非轻子$J/Ψ$弱衰变已在BESIII上测量。研究这些粲偶素到$D_{(s)}$介子的弱衰变，可为检验标准模型（SM）和探索新物理（NP）提供平台。因此，我们在协变光前夸克模型（CLFQM）中研究了$ψ(1S,2S)$和$η_{c}(1S,2S)$到$D_{(s)}$的半轻子和非轻子弱衰变。利用在CLFQM下计算的跃迁形状因子，我们预测并讨论了分支比、纵向极化$f_{L}$及前后不对称性$A_{FB}$等物理观测量。可发现，Cabibbo允许的半轻子衰变道$ψ(1S,2S)\to D_{s}^{-}\ell^{+}ν_{\ell}$（$\ell=e,μ$）和非轻子衰变模式$ψ(1S,2S)\to D_{s}^{-}ρ^{+}$具有$\mathcal{O}(10^{-9})$量级的较大分支比，最有可能在未来高亮度实验中被观测到。

英文摘要：

In addition to the strong and electromagnetic decay modes, the $ψ(1S,2S)$ and $η_{c}(1S,2S)$ can also decay via the weak interaction. Such weak decays can be detected by the high-luminosity heavy-flavor experiments. At present, some of the semileptonic and nonleptonic $J/Ψ$ weak decays have been measured at BESIII. Researching for these charmonium weak decays to $D_{(s)}$ meson can provide a platform to check of the standard model (SM) and probe new physics (NP). So we investigate the semileptonic and nonleptonic weak decays of $ψ(1S,2S)$ and $η_{c}(1S,2S)$ to $D_{(s)}$ within the covariant light-front quark model (CLFQM). With form factors of the transitions $ψ(1S,2S)\to D_{(s)}$ and $η_{c}(1S,2S)\to D_{(s)}$ calculated under the CLFQM, we predict and discuss some physical observables, such as the branching ratios, the longitudinal polarizations $f_{L}$ and the forward-backward asymmetries $A_{FB}$. One can find that the Cabibbo-favored semi-leptonic decay channels $ψ(1S,2S)\to D_{s}^{-}\ell^{+}ν_{\ell}$ with $\ell=e,μ$ and the nonleptonic decay modes $ψ(1S,2S)\to D_{s}^{-}ρ^{+}$ have relatively large branching ratios of the order $\mathcal{O}(10^{-9})$, which are most likely to be accessible at the future high-luminosity experiments.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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