[Rivet-announce] Rivet 2.0.0b1 and YODA 1.0.0 released

[Andy Buckley]

Hi again everyone,

Hot on the tail of Rivet 1.8.3 we have now made available the first beta
testing release of Rivet version 2. It's available from the Rivet
website download area as usual, via http://rivet.hepforge.org , or you
can check out the SVN trunk/2.0.0b1 tag.

Many of you may find it most convenient to use an experimental AFS
installation of Rivet 2.0.0b1: calling "source
/afs/cern.ch/sw/lcg/experimental/rivet/setup.sh" from a bash shell
should set up everything. Let us know if you have trouble with this
installation: we hope it's an easy way to try out the new Rivet.

We have big plans for the Rivet 2 series, including improvements to the
jet system for tagging and substructure analyses, but the HUGE
difference of this release from 1.x is the complete overhaul of the
histogramming system to use the new YODA package.

Rivet's histograms now store much more event weight information than
before, which finally allows exact merging of histograms from multiple
parallel runs, either for CPU efficiency or because different
contributing processes nees to be combined (esp. for Alpgen and
MadGraph). It also paves the way to full handling of NLO counter-events
and multi-weight events, as well as a "factorised finalize".

Watch this space... and please try out Rivet 2.0.0b1 and get in touch
with problems & questions (and praise ;-) )  A full 2.0.0 release will
follow after we've got some feedback and finished the conversion to YODA
of the few remaining histograms... at which point this will be the only
active Rivet release series.

Best wishes,
Andy & the Rivet2 team

-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Edinburgh

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.