[Rivet] MC Predictions in Rivet

[Christian Gutschow]

Hi Andy,

ATLAS have been putting SM predictions on HEPData for many years now, see e.g. this example from a 2012 search:

https://hepdata.net/record/ins1125961

or this unfolded measurement from earlier this year:

https://www.hepdata.net/record/78366

I’m fairly sure I’ve seen CMS do the same. Perhaps we can sort out necessary developments on the YODA side at the upcoming workshop...

Cheers,
Chris

On 4 Sep 2017, at 15:12, Andy Buckley <andy.buckley at cern.ch<mailto:andy.buckley at cern.ch>> wrote:

Hi David,

Yes, we're definitely happy with that. The much bigger battle to be
fought is on the experiment side. If this info starts appearing in
HepData, we will support it -- perhaps via a special /MC path prefix,
if we can't figure out a better way: we have the IsRef annotation for
ref data, but still need to convert the dict returned by default YODA
read() to a multimap or similar, to allow multiple data objects with
the same path.

Andy

On 1 September 2017 at 14:42, Yallup, David <david.yallup.15 at ucl.ac.uk<mailto:david.yallup.15 at ucl.ac.uk>> wrote:
Hi Riveteers,


I think this is something that I've mentioned before, but I was thinking
about having the possibility to package the experiments MC predictions
with the rivet routines, basically just including a second scatter
alongside each of the /REF/ data scatters, /MC/ or something along those
lines

The reasoning from my PoV is mostly that this would be useful is in
limit setting/ results reinterpretation, but I think there's also a good
case that the experiments MC is getting increasingly more
complicated/time consuming to reproduce as the calculations get more
complicated. I don't know however if people think this would actually be
helpful for more "standard" uses of Rivet, MC Development/Tuning etc?


Anyway really the work in rivet for this would be minimal and I guess it
would be mostly about pushing the Experiments and the HepData entries to
provide this. I wanted to raise this to the list to see if this sounds
like a useful, 'rivet-ey'  and probably most importantly feasible idea
to pursue.


Cheers,
David

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--
Dr Andy Buckley, Lecturer / Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow
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 —

 Dr. Christian Gütschow

 Department of Physics and Astronomy
 University College London
 Gower Street
 London WC1E 6BT

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