[Rivet] Example of Rivet analysis for Z->ee process

[Andy Buckley]

Actually, a correction: in Rivet we wrap the histogram division in a
routine which assigns to the output ratio object and re-sets titles,
paths, etc. So it's divide(h1, h2, output). You'll find examples in
existing analyses -- easiest way to find them is to grep the
src/Analyses/*.cc files.

In the YODA histogramming which we wrap, you can just do h1 / h2, or
h1.divideBy(h1).

Hope that helps,
Andy


On 23/01/15 12:47, Andy Buckley wrote:
> divide(h1, h2)  !!
> 
> 
> On 23/01/15 05:49, Elzbieta Richter-Was wrote:
>> Hello,
>>
>>   we have tried successfully to run ATLAS analyses, but then 
>> trying to implement our won analysis encountered problem to which
>> we cannot find solution in the code.
>>
>> In the "finalise" step we need to make ratio of two histograms, seems
>> that such method like 
>>       hist->Divide(hist, hist1, c, c1) 
>> does not exists for histograms implementation in Rivet?
>> Is it possible?
>>
>> Could you help and send us suggestion how to do it 
>>
>> thanks
>>
>> Elzbieta
>>
>>
>>
>>
>> On Thu, 2014-11-20 at 11:04 +0000, Andy Buckley wrote:
>>> On 20/11/14 09:57, Elzbieta Richter-Was wrote:
>>>> Hello Andy,
>>>>
>>>>    could you point me to the example of Rivet analysis which is working
>>>> on events
>>>> from Sherpa for the Z->ee process. Either on the public page or ATLAS code?
>>>> I would like to try it out with students and get a bit familiar with the
>>>> system,
>>>
>>> Hi Elzbieta,
>>>
>>> There are quite a few Z->ee analyses, from ATLAS, CMS, Tevatron, etc. as
>>> well as pure MC without any reference data. Here are links to two ATLAS
>>> Z pT measurement analyses:
>>>
>>> http://rivet.hepforge.org/analyses#ATLAS_2011_S9131140
>>> http://rivet.hepforge.org/analyses#ATLAS_2012_I1204784
>>>
>>> And here are the pure MC analyses we have for events with single
>>> leptonic Z's:
>>>
>>> http://rivet.hepforge.org/analyses#MC_ZINC
>>> http://rivet.hepforge.org/analyses#MC_ZJETS
>>> http://rivet.hepforge.org/analyses#MC_ZKTSPLITTINGS
>>>
>>> All analyses should work with Sherpa as well as with any other
>>> generator. If they don't it's a bug, so please let us know! (To
>>> rivet at projects.hepforge.org)
>>>
>>> Cheers,
>>> Andy
>>>
>>
> 
> 


-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow / PH Dept, CERN