[Rivet] Fwd: CMS_2015_I1310737

[Janssen Xavier]

Hi Fabio,

I was away last week due to a small accident and I missed that email. As you are listed as the author of this plugin inside CMS, can you check the remarks below ?

Cheers, Xavier.

Begin forwarded message:

From: Chris Pollard <cpollard at cern.ch<mailto:cpollard at cern.ch>>
Subject: CMS_2015_I1310737
Date: 6 Jul 2015 14:53:58 GMT+2
To: <xavier.janssen at uantwerpen.be<mailto:xavier.janssen at uantwerpen.be>>
Cc: Rivet <rivet at projects.hepforge.org<mailto:rivet at projects.hepforge.org>>

Hello Xavier, all,

We intend to release Rivet 2.3.0 tomorrow. I was just having a look at the analysis CMS_2015_I1310737 and found a number of things that I'd like to change before including it in the release. A quick summary of what I've changed is below. In general it'd be good to make sure analyzers are aware of these sorts of things because it saves them, you, and the Rivet devs a lot of time!

- unitful quantities (energy/momenta) need to have units (e.g. 110*GeV)
- avoid calling fastjet directly unless absolutely necessary; the Rivet::FastJets class provides a nice, "Rivety" interface to it.
- the ZFinder class finds leptonic Z candidates automatically, handles lepton dressing for you, /and/ provides an easy veto on dressed leptons when building jets; please use it!
- can you verify that all the histogram fill()s have a weight of 0.5 so that the end plots are valid per lepton flavor?

I've attached the original analysis tarball as well as a "new" one. I've also attached a comparison with Pythia Z+parton MC. Could you please have a look and verify that my changes do what is intended ASAP? If we don't hear by tomorrow we'll probably have to delay until the next bugfix release.

Cheers,

Chris


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