[Rivet] useInvisibles

[David Grellscheid]

Hi everyone,

It seems that at the moment, neither of the two options does what ATLAS 
seems to want. From the code comments:

> The default behaviour is that jets are only constructed from visible
> (i.e. charged under an SM gauge group) particles. Some jet studies,
> including those from ATLAS, use a definition in which neutrinos from hadron
> decays are included (via MC correction) in the experimental jet definition.

If useInvisibles is true, Rivet not only includes the neutrinos from 
hadron decays, but all invisibles. W+jets analyses should be careful there!

See you,

   David


PS: I still do not understand why one would want to correct for an 
undetectable particle, but we've had that discussion before.