[Rivet] submission of analysis ATLAS_2014_I1282447

[Kristin Lohwasser]

Hi there,

I wanted to check back with the ATLAS people, whether there is something 
to be done from my side for this further?

essentially to get this into the folder 
https://www.hepforge.org/archive/rivet/contrib/
(where i can't see this right now).

For background info (to Roman et al) this is the W+c analysis and I kept 
being asked by the SM convenors, Claire Gwenlen and Stefano Camarda from 
the PDF forum to submit this. I presented the cross check on the code in 
the PDF forum.

Best
Kristin


On 23.11.2014 18:55, Andy Buckley wrote:
> Hi Kristin,
>
> Thanks! I've copied in Roman L as the current ATLAS Rivet contact, and
> James & Monica since I don't know if the system has changed at all with
> the shift to the new PMG group.
>
> Just to clarify, when you say "FSR must be turned off", do you mean that
> *QED* FSR must be turned off? That should have less impact than
> disabling QCD FSR, which I really hope isn't what you meant, but is
> still a bit against the Rivet ethos.
>
> Assuming that you do mean QED FSR, I thought that all ATLAS SM EW
> results were now meant to use dressed leptons, plus Born ones if
> necessary -- in existing EW measurements such as the Z pT and phi*
> observables, and even the Z underlying event, we only implemented the
> dressed version in Rivet because there isn't any portable definition of
> Born leptons. Requiring that no QED FSR is enabled is one way to force a
> portable Born definition, but a) it means this analysis can't be used in
> the same MC run as other 7 TeV pp W analyses, and b) I guess that matrix
> elements containing higher-order QED corrections are also not usable
> with this analysis, since the _ME_ is then providing the sort of QED
> correction that you're labelling as "FSR", and there really is no "Born"
> W to compare to?
>
> If all this is unavoidable, then we just deal with it and of course any
> analysis code is better than none, but since the MC/theory technology is
> ever-improving if this analysis can be made more future proof using the
> existing data then now is the time to do so.
>
> Thanks again,
> Andy
>
>
>
> On 22/11/14 23:37, Kristin Lohwasser wrote:
>> Dear all,
>>
>> herewith I would like to submit ATLAS analysis ATLAS_2014_I1282447
>> (W+charm production)
>>
>> Two things to note:
>> -- some part of the measurements are ratios (also to Winclusive
>> production), this is a bit harder to implement and not possible in one
>> go, therefore I have put a description at the start of the .cc file
>> (thinking about it, also the W+/W- histograms probably will work only
>> for post-processing in the case of generators only producing one
>> charge). [however the most interesting plots can ge gotten out straigh
>> away]
>> -- THE CODE SHOULD BE RUN WITH FSR TURNED OFF!!!
>>
>> It has been tested with the ATLAS version of Rivet 2.x.
>>
>> Please let me know, once this is uploaded to your website.
>>
>> Best
>> Kristin
>>
>>
>>
>> _______________________________________________
>> Rivet mailing list
>> Rivet at projects.hepforge.org
>> https://www.hepforge.org/lists/listinfo/rivet
>>
>

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Dr. Kristin Lohwasser

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Kristin.Lohwasser at cern.ch
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