[Rivet] transverse sphericity in rivet

[Hendrik Hoeth]

Hi Tobias,

> I think that doesn't solve the problem as I don't know how to set
> the z-component of the momentum to zero.

you are already doing that for your Thrust. It *should* work in exactly
the same way for Sphericity.

> Where do I find a description of the sphericity projection?

Uh, I'd have a look at the sources:

include/Rivet/Projections/Sphericity.hh
src/Projections/Sphericity.cc

Cheers,

   Hendrik

-- 
Journalist: "Can you explain 5 sigma as 99.999something percent?"
Fabiola G.: "Sure, that's 3*10^-7."
(after the CERN Higgs seminar, 4 July 2012)