标题： 光核反应中的魅夸克产生在强子模型中 显示英文标题

标题： Charm production from photo-nucleon reaction in a hadronic model

摘要： 我们研究了在阈值附近光致产生开放奇夸克强子的总截面，使用了强子拉格朗日量。 包含涉及$\Lambda_c$和一个奇夸克介子的两体末态以及包含核子和一个奇夸克-反奇夸克介子对的三体末态。 在相互作用顶点处的形状因子中采用适当的截止参数，该模型给出的总截面与在质心系能量为6 GeV时的测量数据一致。 结果与一阶微扰QCD的预测进行了比较。 显示英文摘要

摘要： We study the total cross section for photo production of open charm hadrons near threshold using a hadronic Lagrangian. Both two-body final states involving $\Lambda_c$ and a charmed meson as well as three-body final states involving nucleon and a charm-anticharm meson pair are included. With appropriate cut-off parameters in the form factors at interaction vertices, the model gives a total cross section that is consistent with the measured data at center-of-mass energy of 6 GeV. The result is compared with the prediction from the leading-order perturbative QCD.