论文标题
$ pp \ to \ {pp \} _sπ^0 $反应$ \ sqrt {s} $ = 2.65 GEV的谐振行为
Resonant behavior of the $pp \to \{pp\}_s π^0$ reaction at the energy $\sqrt{s}$ = 2.65 GeV
论文作者
论文摘要
我们报告了$ \ sqrt {s} $ = 2.5-2.9 $ \ sqrt {s} $ = 2.5-2.9 $ pp \ to \ to \ {pp \} _sπ^0 $ where $ \ \ \ \ {pp \} _ s $ as $^1 $ potton的测量值$ \ sqrt {s} $ = 2.5-2.9 $ = 2.5-2.9 GEV的测量值。该实验已使用Cosy-Jülich的Anke光谱仪进行。数据揭示了向前$ \ {pp \} _ s $差异横截面的能量依赖性，该横截面$ \ sqrt {s} $ = 2.65 GEV，宽度$γ$ = 0.26 GEV，并且横截面的斜率也会在经过的峰值区域变化。这是激发新的$ d（2650）$共振状态的一种迹象，这可能是一个由两个激动的baryons $δ（1232）$和$ n^*（1440）$组成的dibaryon共振系统。
We report on measurements of the differential cross section $dσ/dΩ$ in the energy region of $\sqrt{s}$ = 2.5-2.9 GeV of the reaction $pp \to \{pp\}_s π^0$ where $\{pp\}_s$ is a $^1\!S_0$ proton pair. The experiment has been performed with the ANKE spectrometer at COSY-Jülich. The data reveal a peak in the energy dependence of the forward $\{pp\}_s$ differential cross section at the energy $\sqrt{s}$ = 2.65 GeV with the width $Γ$ = 0.26 GeV, and also the cross section slope changes its sign in the region of the observed peak. This is an indication for the excitation of a new $D(2650)$ resonant state, that may be a dibaryon resonance system consisting of two excited baryons $Δ(1232)$ and $N^*(1440)$.
