CepGen – A generic central exclusive processes event generator for hadron-hadron collisions

We present an event generator for the simulation of central exclusive processes in hadron-hadron reactions. Among others, it implements the two-photon production of lepton pairs previously introduced in LPAIR. As a proof of principle, we show that the two approaches are numerically consistent. The k_T-factorized description of this process is also handled, along with the two-photon production of a quark, or a W^+- gauge boson pair. This toolbox may be used as a common framework for the definition of many other processes following this approach. Additionally, photoproduction and other photon induced processes are also considered, or being implemented.

我们提出了一款用于强子-强子反应中中心排他性过程（central exclusive processes）模拟的事件生成器（event generator）。除此之外，该生成器实现了此前在LPAIR中提出的双光子轻子对产生过程。作为原理性验证，我们证明了这两种方法在数值上具有一致性。该过程的k_T因子化（k_T-factorized）描述同样得到支持，此外还可处理双光子产生夸克或W±规范玻色子对（W^+- gauge boson pair）的过程。该工具箱可作为遵循此研究范式的众多其他过程定义的通用框架。此外，光生过程及其他光子诱导过程也已被纳入考虑或正在实现中。