The CCFM Monte Carlo generator Cascade

Abstract
Cascade is a full hadron level Monte Carlo event generator for ep, γp and p p ̄ processes, which uses the CCFM evolution equation for the initial state cascade in a backward evolution approach supplemented with off-shell matrix elements for the hard scattering. A detailed program description is given, with emphasis on parameters the user wants to change and common block variables which completely specify the generated ...

Title of program: CASCADE 1.00/01
Catalogue Id: ADPK_v1_0

Nature of problem
High-energy collisions of particles at moderate values of x are well described by resummations of leading logarithms of transverse momenta (alphas ln Q^2)^n, generally referred to as DGLAP physics. At small x leading-logs of longitudinal momenta, (alphas ln x)^n, are expected to become equally if not more important (BFKL). An appropriate description valid for both small and moderate x is given by the CCFM evolution equation, resulting in an unintegrated gluon density A(x,kt,,qbar), which is also ...

Versions of this program held in the CPC repository in Mendeley Data
ADPK_v1_0; CASCADE 1.00/01; 10.1016/S0010-4655(01)00438-6

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

摘要
Cascade是一款适用于ep、γp及p p̄（质子-反质子）碰撞过程的全强子层次蒙特卡洛事件生成器（Monte Carlo event generator），其针对初态级联采用CCFM演化方程（CCFM evolution equation），通过向后演化方法实现，并辅以硬散射过程的离壳矩阵元（off-shell matrix elements）进行补充。本文给出了该程序的详细描述，重点阐述了用户所需修改的参数，以及可完全定义生成事件的公共块变量（common block variables）……

程序名称：CASCADE 1.00/01
目录编号：ADPK_v1_0

问题本质
当x取中等取值时，粒子的高能碰撞可通过横向动量领头对数[(αₛ ln Q²)]ⁿ的重整化进行良好描述，这类物理通常被称为DGLAP物理。当x取小值时，纵向动量领头对数[(αₛ ln x)]ⁿ的贡献即便不会更为显著，也会达到同等重要的水平（BFKL）。CCFM演化方程可给出同时适用于小x与中等x取值的合理描述，由此得到非积分胶子密度A(x, k_t, q̄)，其相关内容亦……

Mendeley数据中的CPC程序库收录的该程序版本：
ADPK_v1_0; CASCADE 1.00/01; 10.1016/S0010-4655(01)00438-6

本程序源自贝尔法斯特女王大学所维护的CPC程序库（1969-2019）