D Dbar production and their interactions
D Dbar production and their interactions
复制标题
D Dbar 的产生及其相互作用
DOI：
10.1103/physrevd.82.014011
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
W.-Z. Deng and S.-L. Zhu
中科院分区：
文献类型：
--
作者：
Y.-R. Liu;M. Oka;M. Takizawa;X. Liu;W.-Z. Deng and S.-L. Zhu
利用重夸克有效理论中的耦合常数，在介子交换模型中研究了波和波的散射。通过提取波的相移和可分离势的近似，我们考虑了散射效应，并研究了产生过程。我们发现，用这种机制很难解释BES合作观测到的反常线形。结合我们的模型计算和实验测量，我们估计近乎普遍的截止参数的上限在2GeV左右。利用这个数，得到了束缚态结合能的上限.假设波和波相互作用依赖于相同的截止，我们的研究提供了一种从波介子对的产生中提取关于波分子束缚态的信息的方法。
- and-wavescatterings are studied in a meson exchange model with the coupling constants obtained in the heavy quark effective theory. With the extracted-wave phase shifts and the separable potential approximation, we include therescattering effect and investigate the production process. We find that it is difficult to explain the anomalous line shape observed by the BES Collaboration with this mechanism. Combining our model calculation and the experimental measurement, we estimate the upper limit of the nearly universal cutoff parameter to be around 2 GeV. With this number, the upper limits of the binding energies of the-waveandbound states are obtained. Assuming that the-wave and-wave interactions rely on the same cutoff, our study provides a way of extracting the information about-wave molecular bound states from the-wave meson pair production.