[Rivet] CMS_2015_I1384119 plugin (minbias eta)

[Holger Schulz]

Hi Xavier, Hannes,

I am having trouble understand the 13TeV pseudorapidity
distribution in the CMS_2015_I1384119 analysis.

In the rivet version, the ylabel says 1/N dN/deta which would
mean that the integral of the curve should be =1 --- however
it is more like 24.

I had a look into the paper to see if there is some normalisation
factor but found that there on Figure 3 the ylabel is not mentioning
a normalisation, i.e. it says dNch/d eta.

Could you please clarify what the normalisation of this histogram
is?

Thanks,
Holger