[Rivet] HepMC multi weight convention for central weight

[Chris Pollard]

Hi,

I am fine with the name "Weight" for the central weight. I guess it's most
important to hear from the other generator authors, though.

Chris

On Tue, Feb 2, 2016 at 12:52 PM, Holger Schulz <holger.schulz at durham.ac.uk>
wrote:

> Hi all,
>
> the alpha version of rivet 3 (which supports multiple weights natively)
> triggered a discussion on what the central weight name should be.
>
> As far as I know there is only a convention for scale and pdf variations
> in the
> 2013 LesHouches proceedings.
> What was (I think) agreed upon is that the central weight should simply
> come
> first in the weight vector when writing out to HepMc. This however
> states a tiny technical problem as the write out of the WeightContainer
> in HepMc2 does not preserve the order of weights.
>
> Within Sherpa the name "Weight" was used and if I understand correctly,
> would also be fine from Stefan Prestel's point of view.
>
> It is maybe not that urgent but it would help us in the development
> of HepMC and Rivet 3 if we could agree on a name for the central
> weight.
>
>
> Thanks,
> Holger
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