|
[Rivet] ATLAS_2014_I1306294 and comparison to data pointsHannes Jung hannes.jung at cern.chMon Apr 13 15:15:06 BST 2015
Hm, now I am confused.... I thought you just said, I have to divide the data by 2 to get agreement with the MC, or did I misunderstand ? Cheers Hannes On 13.04.2015, at 16:11, Gavin Hesketh <gavin.hesketh at ucl.ac.uk<mailto:gavin.hesketh at ucl.ac.uk>> wrote: Hi Hannes, hm, I haven't seen this effect in the rivet plugin, I get good agreement between data and MC... Though I've only used the test version in Rivet 2.2.0. What MC are you running? Can you point me to some example plots? cheers, Gavin On 13/04/15 15:05, Hannes Jung wrote: Hi Gavin thanks for clarification. But then I guess it should be also corrected in the Rivet plugin, as it is confusing when the data and MC predictions are different by a factor of 2.... Cheers Hannes On 13.04.2015, at 15:47, Gavin Hesketh <gavin.hesketh at ucl.ac.uk<mailto:gavin.hesketh at ucl.ac.uk> <mailto:gavin.hesketh at ucl.ac.uk>> wrote: 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> <mailto: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> <mailto: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> <mailto: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> <mailto: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 *********************************************************************** _______________________________________________ Rivet mailing list Rivet at projects.hepforge.org <mailto:Rivet at projects.hepforge.org> <mailto:Rivet at projects.hepforge.org> https://www.hepforge.org/lists/listinfo/rivet -- 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> <mailto:chris.g at cern.ch> *********************************************************************** Hannes Jung Email: Hannes.Jung at desy.de<mailto:Hannes.Jung at desy.de> <mailto: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 *********************************************************************** _______________________________________________ Rivet mailing list Rivet at projects.hepforge.org https://www.hepforge.org/lists/listinfo/rivet _______________________________________________ Rivet mailing list Rivet at projects.hepforge.org<mailto:Rivet at projects.hepforge.org> <mailto:Rivet at projects.hepforge.org> https://www.hepforge.org/lists/listinfo/rivet *********************************************************************** Hannes Jung Email: Hannes.Jung at desy.de<mailto: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 *********************************************************************** *********************************************************************** 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 *********************************************************************** -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.hepforge.org/lists-archive/rivet/attachments/20150413/14981bfe/attachment.html>
More information about the Rivet mailing list |