标题： $p\bar{p}$碰撞中重介子对的产生在双手袋方法中 显示英文标题

标题： Production of heavy meson pairs in $p\bar{p}$ collisions within a double handbag approach

摘要： 我们研究在质子-反质子湮灭中重介子对的产生，这是在一种受微扰QCD启发的框架下进行的。 特别是我们研究了$p \bar{p} \rightarrow \overline{D^0} D^0$，采用双手提袋方法，其中硬子过程与软强子矩阵元分离。 软矩阵元可以通过转变分布幅度来参数化，这些幅度在味空间中是非对角的。 转变分布幅度被建模为光锥波函数的重叠。 我们获得了对于$p \bar{p} \rightarrow \overline{D^0} D^0$截面相当稳健的模型结果，这些结果预计将在未来 GSI-FAIR 的$\bar{\text{P}}\text{ANDA}$探测器上进行测量。 显示英文摘要

摘要： We study the pair-production of heavy mesons in proton-antiproton annihilations within a perturbative QCD-motivated framework. In particular we investigate $p \bar{p} \rightarrow \overline{D^0} D^0$ within a double handbag approach, where a hard subprocess factorizes from soft hadronic matrix elements. The soft matrix elements can be parametrized by transition distribution amplitudes, which are off-diagonal in flavor space. The transition distribution amplitudes are modelled as overlaps of light-cone wave functions. We obtain rather robust model results for $p \bar{p} \rightarrow \overline{D^0} D^0$ cross sections, which are expected to be measured at the future $\bar{\text{P}}\text{ANDA}$ detector at GSI-FAIR.