Eur. Phys. J. C (2016) 76: 196
https://doi.org/10.1140/epjc/s10052-016-4018-8

Special Article - Tools for Experiment and Theory

Herwig 7.0/Herwig++ 3.0 release note

¹ Institute for Theoretical Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
² IPPP, Department of Physics, Durham University, Durham, UK
³ Particle Physics Group, School of Physics and Astronomy, University of Manchester, Manchester, UK
⁴ HEP Theory Group, Department of Physics, Florida State University, Tallahassee, USA
⁵ CERN Theoretical Physics Department, Geneva, Switzerland
⁶ The Henryk Niewodniczanski Institute of Nuclear Physics in Cracow, Polish Academy of Sciences, Cracow, Poland
⁷ Institut für Experimentelle Kernphysik, Karlsruhe Institute of Technology, Karlsruhe, Germany

^* e-mail: simon.platzer@durham.ac.uk

Received: 12 January 2016
Accepted: 11 March 2016
Published online: 11 April 2016

Abstract

A major new release of the Monte Carlo event generator Herwig++ (version 3.0) is now available. This release marks the end of distinguishing Herwig++ and HERWIG development and therefore constitutes the first major release of version 7 of the Herwig event generator family. The new version features a number of significant improvements to the event simulation, including: built-in NLO hard process calculation for virtually all Standard Model processes, with matching to both angular-ordered and dipole shower modules via both subtractive (MC@NLO-type) and multiplicative (Powheg-type) algorithms; QED radiation and spin correlations in the angular-ordered shower; a consistent treatment of perturbative uncertainties within the hard process and parton showering. Several of the new features will be covered in detail in accompanying publications, and an update of the manual will follow in due course.