[Rivet] Rivet analysis for LHCb prompt Dmeson

[Patrick Spradlin]

Dear Mr. Riehn,

Thank you for bringing this to my attention.  This was not a feature of the code that i provided to the Rivet developers.  I have copied the Rivet contact list.  For the Rivet team:  how can we get this issue corrected?

Regards,
-patrick spradlin

 

> On 9 Sep 2015, at 13:02, Riehn, Felix (IKP) <felix.riehn at kit.edu> wrote:
> 
> Hello Mr. Spradlin,
> 
> I am working on one of the hadronic event generators used for the
> simulation of extended air showers (Sibyll).
> To set charm production in the model I heavily rely on the measurement
> of prompt D-mesons by LHCb,
> since forward phasespace is very important for air showers.
> When I compare my plots with the ones obtained from the Rivet analysis I
> see a discrepancy in the normalization.
> Having looked at the analysis code in rivet
> (src/Analyses/LHCB_2013_I1218996.cc), I see that in order to increase
> the sampling efficiency a two-sided LHCb (2.<|y|<4.5) is used.
> It looks to me as if this is not taken into account when the histograms
> are normalized in the end.
> When adding a factor of 0.5 to the normalization I get compatible results.
> Can you confirm this?
> 
> Many thanks and kind regards,
> 
> Felix Riehn
> 
> <rivet_d0_rap1.pdf><d0_rap1.pdf><rivet_scaled_d0_rap1.pdf>