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Simulation in LHCb

This page is intended to hold fast evolving information on the simulation and to allow contributions by all. More information is available from the Gauss official web site that is cross referenced to this site.

Some topics in these pages may be not up to date, in which case they are indicated with Warning, important (May-Be-)Not-Up-To-Date. If you find something is no longer up to date, please tag it as such.

Topic being worked on are indicated with Work in progress, under construction In-Work.


Gauss is the LHCb Simulation software, built on the Gaudi Framework.
It consist of a first phase where the events are generated (e.g. pp collisions at 14 TeV) and a second phase where the particles are propagated trough the LHCb detectors.


The Gauss integration and release manager is Gloria Corti. The list of topics and coordinators/contacts is here.

Gauss Web

The main Gauss web page containing release information and links to user guides and tutorials, is here.


Current and future developments

Bugs and features

To report new bugs or unexpected feature use the "LHCb Physics software" savannah portal and select "Simulation" as category.

You can also check the list of already known bugs and their status.

Future releases

The current sets are under active development and support:

Group Project/Package Details Next version Deadline for contribubion
MC11a Gauss New EvtGen models, new generators or new generator cuts for MC11a v41r3 29 March 2012
MC11a DecFiles Definition of new event types for MC11a v26r6 29 March 2012
DEV Gauss Development for MC11b/MC12a - With code that may not be compatible with MC11a v42r0 15 April 2012
DEV DecFiles new decay files for test for MC11b/MC12a with incompatible changes with respect to MC11a v26r0 15 April 2012
DEV Geant4 Build with latest Gaudi of 9.4 v94r2p3 20 March 2012
DEV Geant4 Based on new 9.5 v95r0 10 April 2012

See the LHCb Tag Collector for details, status and deadline for contributions for future versions.

Instructions to Gauss Managers to prepare releases

-- Last Update: GloriaCorti - 16-Mar-2012

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Topic revision: r75 - 2012-03-16 - GloriaCorti
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