Eur. Phys. J. C (2020) 80: 452
https://doi.org/10.1140/epjc/s10052-020-8011-x

Regular Article - Theoretical Physics

Herwig 7.2 release note

¹ Department of Astronomy and Theoretical Physics, Lund University, Lund, Sweden
² IPPP, Department of Physics, Durham University, Durham, UK
³ Institute for Theoretical Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
⁴ Department of Informatics, University of Bergen, Bergen, Norway
⁵ Higgs Centre for Theoretical Physics, University of Edinburgh, Edinburgh, UK
⁶ Particle Physics, Faculty of Physics, University of Vienna, Vienna, Austria
⁷ CERN, PH-TH, Geneva, Switzerland
⁸ Particle Physics Group, Department of Physics and Astronomy, University of Manchester, Manchester, UK
⁹ The Henryk Niewodniczański Institute of Nuclear Physics in Cracow, Polish Academy of Sciences, Warsaw, Poland
¹⁰ Czech Technical University in Prague, Brehova 7, 115 19, Prague, Czech Republic

^* e-mail: michael.seymour@manchester.ac.uk

Received: 3 April 2020
Accepted: 2 May 2020
Published online: 20 May 2020

Abstract

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.