[Rivet] Work plan

[Frank Siegert]

I've got one more: We have so many pp -> Z (+ jets) analyses and all do 
something very similar for finding the Z candidate, which doesn't look 
exactly pretty. Maybe we can factor this out into a common projection? I'd 
work on this, if you agree that would be useful.

The projection should be flexible in the following points:

- mass acceptance window
- lepton IDs (electron or muon)
- eta ranges for leptons (to allow for the typical "|eta|<1.1 or
  1.5<|eta|<2.5")
- minimum pT for leptons
- maximum dR for photon clustering into Z candidate (0.0 -> off)

Can you think of anything else?

The projection should be able to return the Z candidates as 
vector<pair<Particle, Particle> > and the particles not contained in the Z 
candidate (such that one can run e.g. a jet algorithm on them).

Any thoughts?

Frank