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arXiv 1202.0506hep-ph
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推广的NJL模型中的$τ^{-} \to π^{-} π^{0} ν_τ$衰变

$τ^{-} \to π^{-} π^{0} ν_τ$ decay in the extended NJL model

M. K. Volkov, D. G. Kostunin

摘要:

在扩展的NJL模型中计算了衰变$τ^{-} \to π^{-} π^{0} ν_τ$的宽度。考虑了$W$玻色子与π介子对的接触相互作用以及$ρ$介子在基态和第一径向激发态的贡献。将接触图与中间$ρ$介子在基态的接触图相加,得到与矢量占优模型一致的结果。我们的结果与实验数据是令人满意的一致。

英文摘要:

The width of the decay $τ^{-} \to π^{-} π^{0} ν_τ$ was calculated in the extended NJL model. Contact interaction of $W$ boson with pion pair as well as the contribution of the $ρ$ mesons in ground and first radial-exited states are taken into account. The sum of the contact diagram and diagram with intermediate $ρ$ meson in the ground state leads to the result which coincides with the result of the vector-dominance model. Our results are in satisfactory agreement with experimental data.

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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