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arXiv 1402.4227hep-ph
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相对论Dirac模型中$D_s$介子的质量谱和衰变性质

Mass spectra and decay properties of $D_s$ Meson in a relativistic Dirac formalism

Manan Shah, Bhavin Patel, P C Vinodkumar

摘要:

在相对论性独立夸克模型框架下,采用类马丁势作为夸克禁闭势,计算了$D_s$介子的质量谱。预测的激发态与实验结果以及晶格和其他理论预测符合得很好。利用这些光谱参数计算了衰变常数、电磁跃迁和轻子衰变宽度。其衰变常数$f_P$(252.82 MeV)与CLEO-c报道的252.6 $\pm$(11.1 MeV)非常吻合,预测的$(D_s \rightarrow τ\barν_τ, μ\barν_μ)$分支比($5.706 \times 10^{-2}, 5.812 \times 10^{-3}$)与PDG值($ (5.43 \pm 0.31)\times 10^{-2}, (5.90 \pm 0.33)\times 10^{-3} $)也非常吻合。

英文摘要:

The mass spectra of $D_s$ meson is obtained in the framework of relativistic independent quark model using Martin like potential for the quark confinement. The predicted excited states are in good agreement with the experimental results as well as with the lattice and other theoretical predictions. The spectroscopic parameters are employed further to compute the decay constant, electromagnetic transition and leptonic decay widths. The present result for its decay constant, $f_P$ (252.82 MeV) is in excellent agreement with the value 252.6 $\pm$ 11.1 MeV reported by CLEO-c and the predicted branching ratios for $(D_s \rightarrow τ\barν_τ, μ\barν_μ)$ ($5.706 \times 10^{-2}, 5.812 \times 10^{-3}$) are in close agreement with the PDG values ($ (5.43 \pm 0.31)\times 10^{-2}, (5.90 \pm 0.33)\times 10^{-3} $) respectively.

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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