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arXiv 1706.01043hep-ph
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$e^{+}e^{-}$ -光束碰撞中阈值域$f_1(1285) γ$和$a_1(1260) γ$的产生

The production of the $f_1(1285) γ$ and $a_1(1260) γ$ in colliding $e^{+}e^{-}$-beams in threshold domain

M. K. Volkov, A. A. Pivovarov, A. A. Osipov

备注：
Accepted for publication in IJMPA
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摘要：

在扩展的Nambu-Jona-Lasinio模型框架下，考虑了阈值域中的过程$e^{+}e^{-}\!\to\! (f_1(1285), a_1(1260))γ$.考虑了基态$ρ(770)$、$ω(782)$和径向激发$ρ(1450)$、$ω(1420)$中间介子态的通道。结果表明，在过程$e^{+}e^{-}\to f_1(1285)γ$中，$ρ$ -介子子过程的几率明显大于$ω$ -介子子过程的几率，而在过程$e^{+}e^{-} \to a_1(1260) γ$中，$ρ$ -和$ω$ -通道的贡献几乎相等.并对这种效应的机理进行了讨论。计算了$ρ(1450)\!\to\! f_{1}(1285)γ$、$ω(1420)\!\to\! f_{1}(1285)γ$、$ρ(1450)\!\to\! a_1(1260)γ$和$ω(1420)\!\to\! a_1(1260)γ$的辐射衰减宽度。

英文摘要：

The processes $e^{+}e^{-}\!\to\! (f_1(1285), a_1(1260))γ$ in threshold domain are considered in the framework of the extended Nambu--Jona-Lasinio model. The channels with the ground $ρ(770)$, $ω(782)$ and radially excited $ρ(1450)$, $ω(1420)$ intermediate meson states are taken into account. It is shown that in the process $e^{+}e^{-}\to f_1(1285)γ$, the probability of the subprocesses with $ρ$-mesons significantly exceeds the probability of the subprocesses with $ω$-mesons, whereas, in the process $e^{+}e^{-} \to a_1(1260) γ$, $ρ$- and $ω$-channels give approximately equal contributions. The mechanism of this effect is discussed. The radiative decay widths of $ρ(1450)\!\to\! f_{1}(1285)γ$, $ω(1420)\!\to\! f_{1}(1285)γ$, $ρ(1450)\!\to\! a_1(1260)γ$ and $ω(1420)\!\to\! a_1(1260)γ$ are calculated.

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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