Rivet release 2.0.0

Posted October 25, 2013 by Rivet Developers ‐ 2 min read

After an epic journey of code migration, testing, and endless technical bugfixing, we are extremely pleased to finally announce the release of Rivet 2.0!

The main difference in this release series is the complete overhaul of the histogramming system to use the new YODA package. This is a vast improvement over the AIDA system that we have used since the origins of Rivet, and makes much analysis statistics handling code far simpler and cleaner. It also automatically handles gaps in binning, allows statistical merging of histograms from multiple generator runs, and sets us up to add some very nice features involving multiple weights, NLO counter-events, writing final-style histograms throughout a run, and merging of more complex data objects.

On the physics tools side, we also have big plans for the Rivet 2 series, including improvements to the jet system for flavour tagging and substructure analyses. Plus more and more data and MC validation analyses, of course!

We recommend that everyone begin to migrate their production systems to use Rivet 2. Please let us know if you have any teething troubles and we will do what we can to alleviate them. There will be one more release in the 1.x series: 1.8.4 and 2.0.1 will be released in parallel to add all the analyses which have been supplied to us but have not yet appeared in a release due to the length of time that it has taken to produce Rivet 2.0.0. After that, it will be version 2 all the way ;-) Apologies and thanks to everyone who has been patiently waiting for their analyses to appear in a release.