https://scholars.lib.ntu.edu.tw/handle/123456789/626543
標題: | Two- and three-body hadronic decays of charmed mesons involving a tensor meson | 作者: | Hai-Yang Cheng CHENG-WEI CHIANG Zhi-Qing Zhang |
關鍵字: | QCD FACTORIZATION; B-DECAY; High Energy Physics - Phenomenology; High Energy Physics - Phenomenology; High Energy Physics - Experiment | 公開日期: | 9-三月-2022 | 出版社: | AMER PHYSICAL SOC | 卷: | 105 | 期: | 9 | 來源出版物: | Phys. Rev. D 105, 093006 (2022) | 摘要: | We study the quasi-two-body $D\to TP$ decays and the three-body $D$ decays proceeding through intermediate tensor resonances, where $T$ and $P$ denote tensor and pseudoscalar mesons, respectively. We employ $D\to T$ transition form factors based upon light-cone sum rules and the covariant light-front quark model to evaluate the decay rates, with the former giving a better agreement with current data. Though the tree amplitudes with the emitted meson being a tensor meson vanish under factorization approximation, contributions proportional to the tensor decay constant $f_T$ can be produced from vertex and hard spectator-scattering corrections. We also investigate the finite-width effects of the tensor mesons and find that, contrary to three-body $B$ decays, the tensor-mediated $D$ decays are more seriously affected and the narrow width approximation has to be corrected. More experimental data are required in order to extract information topological amplitudes associated with quasi-two-body $D\to TP$ decays. Among the data, the $D^+\to f_2\pi^+$ and $D^+\to \bar K_2^{*0}\pi^+$ branching fractions are not self consistent and further clarification is called for. |
描述: | 18 pages |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/626543 | ISSN: | 2470-0010 | DOI: | 10.1103/PhysRevD.105.093006 |
顯示於: | 物理學系 |
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