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arXiv 0910.5867hep-phhep-exnucl-exnucl-th
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利用介子光生发现类粲偶素态Y(3940)的可能性

Discovery potential for charmonium-like state Y(3940) by the meson photoproduction

Jun He, Xiang Liu

摘要:

在这项工作中,我们调查的发现潜力的Y(3940)的光生产过程$γp\to Y(3940)p$。计算结果表明,$γp\to Y(3940)p$的总截面的上(下)限可达1 $nb$(0.1 $μb$)的数量级.此外,还研究了与Y(3940)产生有关的背景分析和Dalitz图。对Y(3940)产生的Dalitz图分析表明,Y(3940)信号与本底可以清楚地区分。通过对$γp$不变质谱的研究,发现Y(3940)的事例数下限可达10/$^2$。建议用介子光生实验寻找Y(3940)。

英文摘要:

In this work, we investigate the discovery potential for Y(3940) by the photoproduction process $γp\to Y(3940)p$. The numerical result shows that the upper (lower) limit of the total cross section for $γp\to Y(3940)p$ is up to the order of 1 $nb$ (0.1 $μb$). Additionally, the background analysis and the Dalitz plot relevant to the production of Y(3940) are studied. The Dalitz plot analysis of Y(3940) production indicates that Y(3940) signal can be distinguished from the background clearly. The lower limit of the number of events of Y(3940) reaches up to 10/0.02GeV$^2$ for one billion collisions of $γp$ by studying the invariant mass spectrum of $J/ψω$. Experimental search for Y(3940) by the meson photoproduction is suggested.

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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