[Rivet] ATLAS analysis to be included into Rivet

[Roman Lysak]

  Hi Hendrik,


On 04/18/2013 04:07 PM, Hendrik Hoeth wrote:
> Hi Roman, hi Kiran,
>
> Thus spake Roman Lysak (lysak at fzu.cz):
>
>>> I'm having a brief look at the code right now. Have you tested it with
>>> weighted events? You do fill a weight vector _vecWeight, but never use
>>> it. The regression seems to assume equal weights for all events. Is that
>>> correct?
>> That is correct.
>>
>> The azimuthal part of the analysis includes the weights.
>> The fwd-bkwd part of the analysis does not include the weights.
> We've discussed this a bit, but we are very hesitant to put the analysis
> into Rivet as it is. Weighted events get more and more common, and there
> are plenty use cases for them (e.g. tuning an NLO generator). So at very
> least we would put a mechanism in place such that weighted events would
> throw an exception -- which of course would render that part of the
> analysis useless for weighted runs.
fine, we will try to update this so it properly account for weighted events

>
> Therefore we would very much prefer a solution where the analysis has
> proper support for weights. How much effort do you think that would be?
not sure, I suppose we will not get help from the original authors of 
the analysis, so probably I will have to do it by myself. I will let you 
know.

Cheers,
   Roman

>
> Cheers,
>
>     Hendrik
>