A new release of the Monte Carlo event generator Herwig (version 7.2) is now available. This version introduces a number of improvements over the major version 7.0, notably: multi-jet merging with the dipole shower at LO and NLO QCD; spin correlations in both the dipole and angular-ordered parton showers; an improved choice of evolution variable in the angular-ordered parton shower; improvements to mass effects and top decays in the dipole shower, improvements to the simulation of multiple-parton interactions, including diffractive processes; a new model for baryonic colour reconnection; improvements to strangeness production; as well as a new tune of the hadronisation parameters and support for generic Lorentz structures in BSM models. This article illustrates new features of versions 7.1 and 7.2.

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Herwig 7.2发行说明

现已提供新版本的蒙特卡洛事件生成器Herwig（7.2版）。这个版本引入了对主要版本7.0的许多改进，特别是：LO和NLO QCD处的偶极喷头与多喷流合并；偶极和角序帕顿阵雨中的自旋相关；角序parton花洒中进化变量的改进选择；改善了偶极阵雨中的质量效应和顶部衰减，改善了多部分相互作用的模拟，包括衍射过程；重压颜色重新连接的新模型；改善陌生产生；以及强铁化参数的新调子以及对BSM模型中通用Lorentz结构的支持。本文介绍了版本7.1和7.2的新功能。