论文标题
$ψ^{（\ ast）} p $散射长度，基于接近阈值charmons photoproduction
The $ψ^{(\ast)}p$ scattering length based on near-threshold charmoniums photoproduction
论文作者
论文摘要
在矢量梅森优势模型的框架下，散射长度的价值可以表示为总横截面$σ（w）$和$ r（w）$之间的比率，其中$ r（w）$是最终动量$ | {\ bf p} _3 | $ |和初始动量$ | | {\ bf p pos cortial cortial cortimun cortimum $ | {\ bf p} _3 |和pos cortial cortial cortial cortial。基于两个Gluon交换模型和有效的Pomeron模型中炭的光生生产的理论研究，我们研究了这项工作中向量介子和质子相互作用的散射长度。结果表明，从这两个模型获得的散射长度$ \左|α_{J/ψP} \ right | $与Strakovsky和同事的理论预测基本一致。此外，我们首先将两个Gluon交换模型中的$ψ（2s）$ - 普罗顿相互作用计算为$ 1.31 \ pm 0.92 $ AM（1 AM = $ 10^{ - 3} $ FM）和$ 3.24 \ pm 0.63 $ AM。这与这两个模型有所不同，需要从随后的实验中进行精确的测量。简而言之，我们的结果将为未来的研究提供有关表征媒介中 - 普罗顿散射长度的理论参考。
Under the framework of Vector Meson Dominance model, the value of scattering length can be expressed as a function of the ratio between total cross section $σ(W)$ and $R (W)$, where $R(W)$ is the ratio between final momentum $|{\bf p}_3 |$ and initial momentum $|{\bf p}_1|$ and positively correlated with the center-of-mass energy. Based on the theoretical study of charmoniums photoproduction within two gluon exchange model and effective pomeron model, we research the scattering lengths of vector mesons and proton interaction in this work. Results show that the scattering length $\left|α_{J/ψp}\right|$ obtained from the two models are close and basically in agreement with the theoretical prediction of Strakovsky and co-workers. Additionally, we first calculate the scattering length of $ψ(2S) $-proton interaction in two gluon exchange model and effective pomeron model as $ 1.31\pm 0.92$ am (1 am = $10^{-3}$ fm) and $ 3.24 \pm 0.63$ am, respectively. This is a little bit different from the two models and requires precise measurements from subsequent experiments. In short, our results will provide a theoretical reference for future studies on characterizing the vector meson-proton scattering length.
