[Rivet] Access to transverse and longitudinal impact parameters

[Leif Lönnblad]

Sorry, I thought you were talking about another kind of impact 
parameters (the heavy-ion kind), so forget what I said before.

However, assuming now that you are interested in production/decay 
vertices, the information is still available through the underlying 
GenEvent object. For a given Rivet::Particle, you can access the 
underlying GenParticle and its production_vertex(). If the generator has 
provided vertex positions they are available there.

Sorry about the confusion,
Leif



On 2014-07-07 13:28, Markus Radziej wrote:
> Hi,
>
> I was wondering if there is some way to access the impact parameter
> information via Rivet? I have tried looking into other analyses, but
> could not find one that works with these variables. I'm not quite sure
> the information even exists, so I decided to write an email.
>
> Thanks for your help,
> Markus Radziej
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