[Rivet] Leading neutrinos?

[Jonathan Butterworth]

Hi Dvaid,

Nothing, obviously.

What is done is that the average activity of neutrinos from SM hadron 
decays is corrected for on average (based on the assumption that we have 
constrained the hadronisation model sufficiently and that hadronic 
decays themselves are well measured/understood, where some systematic 
uncertainty is assigned to this which is admittedly in the end somewhat 
model-dependent).

So anything extra should be included in ETmiss. This is how they would 
show up in the measurement.

I think the consistent rivet behaviour is to add all neutrinos from SM 
hadron decays into jets, and to add all and any other WI(M)Ps into the 
missing ET.

Cheers,
Jon

On 01/03/2011 10:09, David Grellscheid wrote:
> Hi Jon,
>
>> Since in the MC used to do these corrections, the neutrino from the W
>> is ~always the leading particle, I think using this is actually
>> correct, and is what the experiments measure,
>
> This is what I'm confused about, I think. What exactly do you measure
> about a specific neutrino? How can you pick out a given one from the
> general 'invisibles' pool?
>
> Thanks,
>
> David

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Prof. Jonathan Butterworth,              http://www.hep.ucl.ac.uk/~jmb/
Physics and Astronomy Department                  Tel: +44 20 7679 3444
ATLAS, CERN                                       Tel: +41 22 76  72340
University College London                 Gower St, London WC1E 6BT, UK
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