[Rivet] ATLAS_2014_I1306294 and comparison to data points

[Gavin Hesketh]

Hi Hannes,
in the data analysis we did combine the electron and muon channels. We 
unfold to a fiducial volume where the electron and muon channels are 
identical, so then just divide the data result by 2 to get a 
per-lepton-channel cross section.
In other words, you can compare either a Z->ee only run, or a Z->mumu 
only run to the data.
cheers,
Gavin

On 13/04/15 05:42, Hannes Jung wrote:
> Dear Christian
>
> thanks a lot for your reply.
> Yes, but the data are the sum of electron and muon channel, as far as I
> can conclude
> from the paper, since it is written:
> "Since the electron and muon Z boson decay channels are combined to
> increase
> the precision of the signal fits to data.... "
>
> Cheers
> Hannes
>
>
>> On 12.04.2015, at 20:58, Christian Gütschow <chris.g at cern.ch
>> <mailto:chris.g at cern.ch>> wrote:
>>
>> Hi Hannes,
>>
>> unfolded data has only been provided for the combined lepton channels,
>> which is why the data points are the same for all three plugins. The
>> default plugin will look for Z candidates in the electron channel. The
>> two other plugins are just there for convenience, i.e. to allow users
>> to specify the decay channel they want to look at.
>>
>> In the data, the two lepton channels were found to be consistent with
>> each other, so it's okay to compare their combination (i.e. the
>> weighted average) to the individual lepton channels in MC.
>>
>> Cheers,
>> Chris
>>
>> On 12 April 2015 at 19:18, Hannes Jung <hannes.jung at desy.de
>> <mailto:hannes.jung at desy.de>> wrote:
>>
>>     Hi Andy
>>
>>     thanks for your fsat reply.
>>     Yes, the versions for muon, electron are available, and
>>     one without specification, but it is the muon one...
>>     the data points are all the same.... the combined ones, I guess.
>>
>>     Thanks again
>>     Cheers
>>     hannes
>>
>>     > On 12.04.2015, at 19:46, Andy Buckley <andy.buckley at cern.ch <mailto:andy.buckley at cern.ch>> wrote:
>>     >
>>     > On 12/04/15 17:07, Hannes Jung wrote:
>>     >> Dear Rivet experts
>>     >>
>>     >> I was wondering, how the comparison of ATLAS_2014_I1306294
>>     >> to the data points from the measurements should be interpreted:
>>     >> it seems the rivet plugin either works for the electron OR muon
>>     >> channel, while the data points are the sum of both.
>>     >>
>>     >> Is it correct, that one cannot directly compare the result from the
>>     >> Rivet plugin with the data ?
>>     >
>>     > Hi Hannes, I think Gavin Hesketh (identified as the author of this
>>     > plugin at e.g.https://rivet.hepforge.org/analyses#ATLAS_2014_I1306294)
>>     > is on the Rivet list, but I've CC'd him explicitly. Typically analysis
>>     > authors will know more details than the Rivet authors do... but I hope
>>     > that the analyses *have* all been written so that MC tuns can be
>>     > compared directly to the data... that's the point!
>>     >
>>     >> Why are the electron and muon channels done in separate plugins,
>>     >> and not added as was done in the data ?
>>     >
>>     > To me it looks like all versions are available... no?
>>     >
>>     >> PS: I am running Rivet 2.2.1
>>     >
>>     > Hurrah! ;-)
>>     >
>>     > Andy
>>     >
>>     > --
>>     > Dr Andy Buckley, Lecturer / Royal Society University Research Fellow
>>     > Particle Physics Expt Group, University of Glasgow
>>
>>     ***********************************************************************
>>     Hannes Jung
>>     Email: Hannes.Jung at desy.de <mailto:Hannes.Jung at desy.de>
>>     mobile :+49 40 8998 93741 <tel:%2B49%2040%208998%2093741>
>>     http://www.desy.de/~jung
>>     Tel: +49 (0) 40 8998 3741 <tel:%2B49%20%280%29%2040%208998%203741>
>>     Fax: +49 (0) 40 8994 3741 <tel:%2B49%20%280%29%2040%208994%203741>
>>     DESY, CMS 01B/02.213
>>     Notkestr.85, 22603 Hamburg, FRG
>>     ***********************************************************************
>>
>>
>>
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>>
>>
>>
>> --
>>
>>  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>
>>
>
> ***********************************************************************
> Hannes Jung
> Email: Hannes.Jung at desy.de <mailto:Hannes.Jung at desy.de>
> mobile :+49 40 8998 93741
> http://www.desy.de/~jung
> Tel: +49 (0) 40 8998 3741
> Fax: +49 (0) 40 8994 3741
> DESY, CMS 01B/02.213
> Notkestr.85, 22603 Hamburg, FRG
> ***********************************************************************
>
>
>
>
>
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