AI 中文总结
提出Pythia 8中用于电子-质子深非弹性散射的乘性次领头阶匹配方案，通过逐事件积分和矩阵元修正实现，验证与HERA数据一致，并评估对电子-离子对撞机的影响。
AI 中文摘要
我们提出了 Pythia 8 中一个新的乘性次领头阶（NLO）匹配方案，用于电子-质子碰撞中的深非弹性散射（DIS）过程。该实现基于对虚修正和实发射相空间的逐事件数值积分，以及对首个部分子簇射发射的矩阵元修正（MECs）。后者已包含在 Pythia 8 当前可用于处理 DIS 过程的两个部分子簇射选项中：默认的偶极反冲簇射和 Vincia。该实现已与其他可用的 NLO 事件生成器进行了验证，并与 HERA 对撞机的实验数据进行了比较。在所有情况下，我们发现一致性非常好，证实了新 Pythia 实现的正确性。我们还研究了 MECs 在每个簇射中的影响，并考虑了对即将到来的电子-离子对撞机的意义。
英文摘要
We present a new multiplicative next-to-leading order (NLO) matching scheme in Pythia 8 for deep-inelastic scattering (DIS) processes in electron-proton collisions. The implementation is based on numerical event-by-event integration over the virtual corrections and real-emission phase-space and matrix-element corrections (MECs) for the first parton-shower emission. The latter has been included for two parton-shower options currently available in Pythia 8 to handle DIS processes, the default shower with dipole-recoil option and Vincia. The implementation has been validated against other available NLO-capable event generators and compared to experimental data from the HERA collider. In all cases we find very good agreement confirming the validity of the new Pythia implementation. We also study the impact of the MECs in each shower and consider the implications for the upcoming Electron-Ion collider.
Comments7 pages, 4 figures, Contribution to the proceeding of the 33rd International Workshop on Deep Inelastic Scattering and Related Subjects (DIS2026), 4-8 May 2026, Bologna, Italy
