[Herwig-announce] Herwig++ 2.1 released

[David Grellscheid]

Dear users and potential users of Herwig++,

A new release of the Monte Carlo program Herwig++ (version 2.1) is now 
available. This version includes a number of significant improvements 
including: an eikonal multiple parton-parton scattering model of the underlying 
event; the inclusion of Beyond the Standard Model (BSM) physics including the 
CP-conserving Minimal Supersymmetric Standard Model (MSSM), the minimal 
Universal Extra Dimensions (UED) model and the Randall-Sundrum model; and a new 
model of meson and tau decays which has been tuned to LEP and B-factory data. 
In addition a number of other changes, such as the inclusion of intrinsic 
transverse momentum in hadron collisions, have been made and a number of bugs 
have been fixed.  The default parameters of the parton shower and hadronization 
models are now the results of a preliminary tune to LEP and SLC data. This 
version of the program is now fully ready for the simulation of events in 
hadron-hadron collisions.

More details of the new features, bug fixes and more technical aspects can be 
found in the release note to appear on hep-ph tomorrow.  A more detailed user 
manual is currently in preparation.

The new program, together with other useful files and information, can be 
obtained from
    http://projects.hepforge.org/herwig/

In order to improve our response to user queries all problems and requests for 
user support should be reported via the bug tracker on our wiki. Requests for 
an account to submit tickets and modify the wiki should be sent to
    herwig at projects.hepforge.org

All the features needed for realistic studies for hadron-hadron collisions are 
now present and we look forward to feedback and input from users, especially 
from the Tevatron and LHC experiments.

Herwig++ is covered by the GNU General Public License (GPL) version 2 and the 
MCnet guidelines for the distribution and usage of event generator software in 
an academic setting, which are distributed together with the source, and can 
also be obtained from
    http://www.montecarlonet.org/index.php?p=Publications/Guidelines


M.Baehr, S.Gieseke, M.Gigg, D.Grellscheid, K.Hamilton, O.Latunde-Dada,
S.Plaetzer, P.Richardson, M.H.Seymour, A.Sherstnev and B.R.Webber.
Cambridge, CERN, Durham, Louvain, Karlsruhe and Manchester,
November 20th 2007.