arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1010.4103nucl-th
收藏

质子光生$ ω(\to π^+π^-π^0) $介子

$ ω(\to π^+π^-π^0) $ meson photoproduction on proton

Swapan Das

摘要:

的横截面估计的$π^+π^-π^0$不变的质量分布在$γp$反应中的GeV区域。由于在GeV区$γp$反应中该介子的产生截面是显著的,并且在$π^+π^-π^0$通道中具有较大的分支比(88.8%),因此假定该反应是通过中间态$ω$介子的形成来进行的。该反应的截面已使用能量依赖反应振幅计算,即,$f_{γp \to ωp}(0)$,从最新的$ω$介子光生数据中提取。我们用已建立的方法计算了$ω$介子的宽度和传播子等其它因素,使我们的计算能提供可靠的截面。计算结果再现了在$γp$反应中测得的$π^+π^-π^0$不变质量分布谱。

英文摘要:

The cross section is estimated for the $π^+π^-π^0$ invariant mass distribution in the $γp$ reaction in the GeV region. This reaction is assumed to proceed through the formation of the $ω$ meson in the intermediate state, since the production cross section for this meson in the $γp$ reaction in GeV region is significant and it has large branching ratio (88.8%) in the $π^+π^-π^0$ channel. The cross sections for this reaction have been calculated using the energy dependent reaction amplitude, i.e., $f_{γp \to ωp}(0)$, extracted from the latest $ω$ meson photoproduction data. We use established procedure to calculate other factors, like width and propagator of the $ω$ meson, so that our calculation can provide reliable cross section. The calculated results reproduce the measured $π^+π^-π^0$ invariant mass distribution spectra in the $γp$ reaction.

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。

↑