质子与原子核上光生过程中双部分子散射（DPS）里的直接光子与分解光子
Direct versus resolved photons in DPS in photoproduction on proton and nuclei
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中文总结 AI 辅助
研究EIC和HERA上光生过程的双部分子散射，发现分解光子使DPS提升约1.6倍，确定直接光子主导区域边界，原子核上该区域会增强。
中文摘要 AI 辅助
我们研究未来电子离子对撞机（EIC）和HERA上与光生过程相关的双部分子散射（DPS）过程。结果显示，在分解光子情形下，即便硬过程的横动量较小，1→2过程也会使DPS在相空间的显著区域内较基于平均场模型的预测提升约1.6倍。此外，我们研究了直接光子贡献占主导的运动学区域，给出了粲夸克和轻夸克喷注的该区域边界，其中粲夸克喷注对应的相关区域为$x_\gamma\ge0.2-0.4$；若考虑原子核上的光生过程，该区域还会进一步增强。
英文摘要
We study the process of double parton scattering (DPS) associated with the photoproduction at a future Electron-Ion collider (EIC) and HERA. We show that in the case of the resolved photon the 1 to 2 processes lead, even at small transverse momenta of the hard processes , to the increase of the DPS by a factor of order 1.6 in the significant part of the phase space, relative to the predictions of the mean field based models . Moreover we study the kinematic region where direct photon contribution is dominant and show it s boundaries for charm and light quark jets. For charmed jets we see that the relevant region is $x_γ\ge 0.2-0.4$. This region is even enhanced if we consider the photoproduction on the nuclei.
