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arXiv 1807.11151hep-phhep-ex
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质子靶光致产生$f_0(980)$和$f_0(1500)$共振

Photoproduction of $f_0(980)$ and $f_0(1500)$ resonances off a proton target

Hanyang Xing, Chun-Sheng An, Ju-Jun Xie, Gang Li

摘要:

我们研究了$γp \to p f_0$ [ $f_0(980)$和$f_0(1500)$ ]反应接近阈值内的有效拉格朗日方法。生产过程通过$s$ -通道核子极或$t$ -通道$ρ$和$ω$交换来描述。研究了$γp\to f_0(980)p \to K^0 \bar{K}^0$和$γp\to f_0(1500)p \to K^0 \bar{K}^0 p$反应的$K^0 \bar{K}^0$不变质量分布,其中两个K介子在$S$波衰减中从$f_0(980)$和$f_0(1500)$分离出来.结果表明,$s$通道过程有利于$f_0(980)$的生成,而对于$f_0(1500)$的生成,实验测量结果可以用$t$通道过程很好地描述.预计理论结果可以通过CLAS的进一步实验进行验证。

英文摘要:

We study the $γp \to p f_0$ [$f_0(980)$ and $f_0(1500)$] reaction close to threshold within an effective Lagrangian approach. The production process is described by $s$-channel nucleon pole or $t$-channel $ρ$ and $ω$ exchange. The $K^0 \bar{K}^0$ invariant mass distributions of the $γp\to f_0(980)p \to K^0 \bar{K}^0$ and $γp\to f_0(1500)p \to K^0 \bar{K}^0 p$ reactions are investigated, where the two kaons have been separated in $S$ wave decaying from $f_0(980)$ and $f_0(1500)$. It is shown that the $s$-channel process is favored for the production of $f_0(980)$, while for the $f_0(1500)$ production, the experimental measurements can be described quite well by the $t$-channel process. It is expected that the theoretical results can be tested by further experiments at CLAS.

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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