[Rivet] Rivet: Accessing intermediate particles

[Hendrik Hoeth]

Hi David,

Thus spake David Hall (David.Hall at physics.ox.ac.uk):

> When I look at the parents of the electrons, it just gives me the
> incoming protons. It does this for >=2 electrons, so not just for
> electrons from the hard scatter. So it seems I can't differentiate
> between electrons this way.

Are you using HepMC_Short or HEPMC2_SHORT_OUTPUT or USE_HEPMC_SHORT?

What's your process (W -> e nu and Z/gamma -> e e gives you three
electrons, all in the hard process)?

> I agree that in an ideal world we can just treat everything exactly
> as we would in data. Unfortunately, due to time constraints and
> deadlines we often need a quick way to do things, so we need to be
> able to do truth-level studies like this relatively quickly.

Good thing is: Usually it's also possible to publish following results,
not just following the calendar. Might take some balls, but certainly
possible, and makes for better publications. And yes, I've been in the
experimental mill, too.

Cheers,

   Hendrik

-- 
Man is the best computer we can put aboard a spacecraft, and
the only one that can be mass produced with unskilled labor.
                                        -- Wernher von Braun