EvtGen

Anders RydCornell U. Nov. 25, 2004

Background First versions of EvtGen emerged in 1995 to simulate semileptonic B decays at CLEO. 

David Lange and I were graduate students working on b->u and   b->c transitions respectively and needed a 'sharper' tool.In 1996 I started on BABAR and we needed to improve the 

simulation of B decays. EvtGen was significantly modified at this point.  Since then EvtGen has been improved and tuned for B0 and B+ decays at BABAR by many people. David Lange and I are the main developers, doing this on our  spare time. The home page for EvtGen is at: 

http://www.slac.stanford.edu/~lange/EvtGen/

Collaborations with other experiments

EvtGen is used, at some capacity, at several different experimentsCDF/D0 work on extensions to 

B baryons and Bs mesons, and 

incoherently produced B hadrons for mixing and CP violation.Though some work has been done, this needs much more 

attention, as it has not been a focus at BABAR.Belle have similar needs as BABAR, has provided bug fixes and  improvements to semileptonic decays.CLEO-c, detailed simulation of production of charmed mesons. LHC experiments...I need to better understand what you are seeing as your needs.

What technical problems are there with using the code etc. In general I don't think we have a good way of sharing code across experiments. I would like to understand how to improve  

this.