[Rivet] Leading neutrinos?

[Frank Siegert]

HI David,

On 28/02/11 16:57, David Grellscheid wrote:
> ATLAS_2010_S8919674 (W+jets) uses a LeadingParticlesFS to make up
> pTmiss. Does that make sense? Shouldn't I add all neutrinos? How would I
> even know how the experimental pTmiss divides over the neutrinos?

Unfortunately this analysis (like some others) corrects to 
pTmiss="neutrino from the W" for the particle level distributions.
Since that is not possible to implement in a generator-independent 
analysis I used the leading neutrino as closest match. This seems to be 
a very good approximation, as I validated the analysis by reproducing 
the Sherpa predictions in the paper using the same ATLAS-internal MC 
samples.

Cheers,
Frank