[Rivet] Rivet 1.2.1 patch release

[Andy Buckley]

Following on from the recent release of Rivet 1.2.0, we announce the
release of a patch release, version 1.2.1, which fixes a significant bug
in the FastJet projection whereby the minimum pT parameter was not being
properly passed to the jet algorithm. Jet-specific analyses may be
affected. Thanks to Frank Siegert for finding and fixing this bug.

Rivet 1.2.1 also contains a new "MissingMomentum" projection, to be used
for calculating missing (transverse) energy in place of the previous and
confusing TotalVisibleMomentum projection which made no effort to
exclude invisible particles. A bug in the MC_SUSY analysis, with exactly
this flaw, has also been fixed.

Rivet 1.2.1 is recommended for immediate use as a replacement for 1.2.0,
and can be downloaded as usual from the
http://projects.hepforge.org/rivet/ Web page. Apologies for the short
time between these releases, but this was a problem that we couldn't
leave "in the wild" for very long!

Best wishes,
Andy

-- 
Dr Andy Buckley
SUPA Advanced Research Fellow
Particle Physics Experiment Group, University of Edinburgh