[Rivet] bug in ATLAS_2014_I1325553 (inclusive jets)

[Holger Schulz]

Christian,

do you think you can still find the validation plots from back then?

Holger

On 21/05/15 20:20, RICHARDSON P. wrote:
> Dear Christian,
>
>   So I was comparing the results with the latest version of Heriwg++ 
> as part of our testing before the next release and we were much 
> further off than I expected. After looking at the analysis and the 
> paper I believed the paper was plotting d sigma /dy/dpT and the 
> analysis d sigma/d|y|/dpT which differ by the factor of 1/2. I 
> contacted Vojtech and he agreed it was wrong so I made the change.
>
>   If it is wrong we can change it back
>
> Best Wishes
>
> Peter
> ------------------------------------------------------------------------
> *From:* Christian Gütschow [chris.g at cern.ch]
> *Sent:* 21 May 2015 18:44
> *To:* Rivet; RICHARDSON P.
> *Subject:* bug in ATLAS_2014_I1325553 (inclusive jets)
>
> Dear Rivet authors,
>
> it looks like a bug has been introduced in the current trunk version 
> of the ATLAS inclusive jets measurement (the version from the last 
> release is fine). Specifically, the normalisation factor in the 
> finalise routine has been modified:
>
> https://rivet.hepforge.org/trac/browser/src/Analyses/ATLAS_2014_I1325553.cc#L83
>
> to include an additional factor of 0.5 -- apparently to fix an issue 
> with the normalisation.
>
> There should be no such factor as absolute rapidity has been used 
> consistently throughout the analysis and such a factor is only really 
> necessary if absolute and signed rapidities are being mixed (axis 
> label vs cross section differential).
>
> Note that the original version (without 0.5) has been validated and no 
> issues with the normalisation have been observed, so I would recommend 
> to unfix this again. :-)
>
>
> Many thanks,
> Chris
>
> -- 
>
>  Dr. Christian Gütschow
>
>  TU Dresden
>  Institut für Kern- und Teilchenphysik
>  Zellescher Weg 19
>  01069 Dresden
>
> > E17, Andreas-Schubert-Bau
> > chris.g at cern.ch <mailto:chris.g at cern.ch>
>
>
>
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