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arXiv 2005.06455hep-phhep-exnucl-th
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半轻子衰变$D\toπ^+π^-e^+ν_e$和$D_s\toπ^+π^-e^+ν_e$作为轻标量介子中组分夸克-反夸克对的探测

Semileptonic decays $D\toπ^+π^-e^+ν_e$ and $D_s\toπ^+π^-e^+ν_e$ as the probe of constituent quark-antiquark pairs in the light scalar mesons

N. N. Achasov, A. V. Kiselev, G. N. Shestakov

摘要:

衰变$D\toπ^+π^-e^+ν_e$和$D_s\toπ^+ π^-e^+ν_e$用作探针,检查在衰变为$π^+π^-$的标量介子的波函数中组成$q\bar q$分量的存在。有大量的具体证据支持光标量的奇异四夸克性质。与此同时,进一步扩展$q^2\bar q^2$模型在新过程中对轻标量的有效性似乎非常有趣和重要。我们分析了BESIII和CLEO对$D^+\to π^+π^- e^+ν_e$和$D^+_s\to π^+π^- e^+ν_e$衰变的实验数据,结果表明这些实验结果可以解释为轻标量介子$σ(500)$和$f_0(980)$的四夸克性质.我们的方法也可以应用到其他类似的衰变光标量的描述。

英文摘要:

Decays $D\toπ^+π^-e^+ν_e$ and $D_s\toπ^+ π^-e^+ν_e$ serve as probes that check the existence of constituent $q\bar q$ components in the wave functions of scalar mesons decaying into $π^+π^-$. There exists a great deal of concrete evidence in favor of the exotic four-quark nature of light scalars. At the same time, the further expansion of the area of the $q^2\bar q^2$ model validity for light scalars on ever new processes seems extremely interesting and important. We analyze the BESIII and CLEO data on the decays $D^+\to π^+π^- e^+ν_e$ and $D^+_s\to π^+π^- e^+ν_e$ and show that the results of these experiments together can be interpreted in favor of the four-quark nature of light scalar mesons $σ(500)$ and $f_0(980)$. Our approach can also be applied to the description of other similar decays involving light scalars.

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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