[Rivet] Rivet routine for D0_2000_I503361

[Holger Schulz]

Hi all,

here is the version without the electron cut on Et with LJET:=2 and NJET:=1

    https://users.hepforge.org/~holsch/d01-x01-y01.pdf

There are some Sherpa issues with primordial kT at tevatron run 
conditions, apart
from that this looks pretty ok to me.

Holger



On 02/10/15 09:12, Frank Siegert wrote:
> Thanks, this is exactly what I was after.
>
> Holger, which direction does the 15-20% offset go? Did you really set
> LJET:=1 (this would mean the 2->1 process is done at NLO, i.e. nothing
> here) or did you mean LJET:=2?
>
> Comparing to NLO we should definitely not see a 15-20% global offset,
> and this could point to wrong lepton cuts.
>
> Cheers,
> Frank
>
>
> On 1 October 2015 at 20:04, Gavin Hesketh<gavin.hesketh at ucl.ac.uk>  wrote:
>> Hi,
>> sorry for weighting in again, but I'm pretty sure there should not be an ET
>> cut on the electrons... Section V in the paper mentions correcting for this.
>> Do the distributions look completely off if you remove that cut?
>> cheers,
>> Gavin
>>
>>
>> On 01/10/15 16:01, Holger Schulz wrote:
>>> On 01/10/15 15:43, Frank Siegert wrote:
>>>> Hi Holger,
>>>>
>>>> given that you have committed this analysis now as validated (using
>>>> Sherpa), I was just wondering whether the normalisation looks as
>>>> expected. Simone mentioned that his validation was done using Pythia8,
>>>> and it would be surprising that Pythia8 matches the cross section
>>>> correctly -- one would expect a global ~ -15% offset due to the
>>>> missing NLO accuracy.
>>>>
>>>> Have you compared it against NLO Sherpa (or LO Sherpa scaled with an
>>>> appropriate k-factor) and see good agreement? Anything else could
>>>> point to missing (lepton?) cuts.
>>>
>>> Hi Frank,
>>>
>>> the paper states an ET cut for the electrons of at least 25 GeV, I
>>> implemented
>>> that one. I ran Sherpa with LJET=1, NJET=1 using the example setup and see
>>> a shape very much compatible with data. The offset is about 15-20%. I ran
>>> 100000 weighted events using trunk without MI_HANDLER
>>>
>>> Here is the shape comparison for the peak region:
>>>
>>>      https://users.hepforge.org/~holsch/d01-x01-y01.pdf
>>>
>>> And this is the distribution up to zpt=150 GeV:
>>>
>>>      https://users.hepforge.org/~holsch/d01-x01-y01_150GeV.pdf
>>>
>>> Cheers,
>>> Holger
>>>
>>>> Cheers,
>>>> Frank
>>>>
>>>>
>>>>
>>>> On 28 September 2015 at 11:39, Simone Amoroso<simo.amoroso at gmail.com>
>>>> wrote:
>>>>> Hi Frank,
>>>>>
>>>>> For the selections (since the paper was not really clear), I copied what
>>>>> was used in the Z/W pT ratio (already in RIVET),
>>>>> which makes use of the same selections.
>>>>>
>>>>> The validation was simply made by running Pythia8, I definitely didn’t
>>>>> apply k-factors,
>>>>> but I might have rescaled the prediction to data (I honestly don’t
>>>>> remember).
>>>>>
>>>>> cheers,
>>>>> Simone
>>>>>
>>>>>> On 23 Sep 2015, at 16:07, Frank Siegert<frank.siegert at cern.ch>   wrote:
>>>>>>
>>>>>> Hi all,
>>>>>>
>>>>>> I have just started to look at this to get it in for the imminent
>>>>>> release. The paper is at first glance not very clear on which
>>>>>> selection requirements were retained for the final cross section
>>>>>> measurement. Simone, do you remember, why you removed the electron ET
>>>>>> cuts? Did they correct completely for the electron acceptance?
>>>>>>
>>>>>> And for your validation plot, I was wondering which Monte-Carlo did
>>>>>> you run, and is the prediction scaled by a (K-)factor?
>>>>>>
>>>>>> Cheers,
>>>>>> Frank
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 1 July 2015 at 15:57, Chris Pollard<cpollard at cern.ch>   wrote:
>>>>>>> Hi Simone,
>>>>>>>
>>>>>>> In this analysis I notice that there is no lepton pt cut imposed in
>>>>>>> the
>>>>>>> ZFinder. Was this intentional? I guess at least one lepton needs to
>>>>>>> have pT
>>>>>>>> 10 GeV to fire the trigger?
>>>>>>> Chris
>>>>>>>
>>>>>>> On Thu, May 7, 2015 at 9:51 AM, Andy Buckley<andy.buckley at cern.ch>
>>>>>>> wrote:
>>>>>>>> On 07/05/15 07:55, Simone Amoroso wrote:
>>>>>>>>> Hi Andy,
>>>>>>>>>
>>>>>>>>> I made a new RIVET routine for the D0 RunI measurement of the Z pT.
>>>>>>>>> Below a validation plot and attached the tarball.
>>>>>>>> Thanks Simone, I've put it in the analysis contrib area and we'll get
>>>>>>>> it
>>>>>>>> into a new Rivet release as soon as possible.
>>>>>>>>
>>>>>>>> Andy
>>>>>>>>
>>>>>>>> --
>>>>>>>> Dr Andy Buckley, Lecturer / Royal Society University Research Fellow
>>>>>>>> Particle Physics Expt Group, University of Glasgow
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