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Herwig++ Physics and Manual

Bähr, M.; Gieseke, S.; Gigg, M.A.; Grellscheid, D.; Hamilton, K.; Latunde-Dada, O.; Platzer, S.; Richardson, P.; Seymour, M.H.; Sherstnev, A.; Webber, B.R.


M. Bähr

S. Gieseke

M.A. Gigg

D. Grellscheid

K. Hamilton

O. Latunde-Dada

S. Platzer

M.H. Seymour

A. Sherstnev

B.R. Webber


In this paper we describe Herwig++ version 2.2, a general-purpose Monte Carlo event generator for the simulation of hard lepton-lepton and hadron-hadron collisions. A number of important hard scattering processes are available, together with an interface via the Les Houches Accord to specialized matrix element generators for additional processes. The simulation of Beyond the Standard Model (BSM) physics includes a range of models and allows new models to be added by encoding the Feynman rules of the model. The parton-shower approach is used to simulate initial- and final-state QCD radiation, including colour coherence effects, with special emphasis on the correct description of radiation from heavy particles. The underlying event is simulated using an eikonal multiple parton-parton scattering model. The formation of hadrons from the quarks and gluons produced in the parton shower is described using the cluster hadronization model. Hadron decays are simulated using matrix elements, where possible including spin correlations and off-shell effects.


Bähr, M., Gieseke, S., Gigg, M., Grellscheid, D., Hamilton, K., Latunde-Dada, O., …Webber, B. (2008). Herwig++ Physics and Manual. The European Physical Journal C, 58(4), 639-707.

Journal Article Type Article
Publication Date Dec 1, 2008
Deposit Date Feb 2, 2012
Publicly Available Date Mar 25, 2015
Journal European Physical Journal C: Particles and Fields
Print ISSN 1434-6044
Electronic ISSN 1434-6052
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 58
Issue 4
Pages 639-707
Keywords 12.38.Cy, 13.87.Ce, 13.87.fh.


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