[Rivet] [Fastjet] Problem with JADE plugin?

[Andy Buckley]

On 25/06/10 17:12, Gavin Salam wrote:
> Hi Andy,
> 
>>> You can also try exclusive_ymerge_max (but I don't think it'll make much
>>> difference -- I'm not sure which corresponds to what Jade did).
>>
>> I tried that -- at least for the 2->3 inclusive plot it made no
>> difference to use the _max version of exclusive_ymerge. For the other
>> transitions I got segfaults -- I guess that when using the ymerge_max(n)
>> I need to explicitly make sure that n jets can definitely be found in
>> the event?
> 
> That sounds bizarre. We've got protection in there for such cases, in
> which case you should just get zero. Can you provide a simple example
> that triggers the problem?

I thought I had the most up to date FastJet, but I was a patch version
behind: updating from 2.4.1 to 2.4.2 fixed the ymerge_max crashing
problem. And using the _max versions of the functions has fixed all the
plot shapes: fantastic. Thanks, Gavin :)

Holger, what FastJet version were you using? It should now definitely be
2.4.2 (or higher in future): I've added a configure check to that effect.

Andy

-- 
Dr Andy Buckley
SUPA Advanced Research Fellow
Particle Physics Experiment Group, University of Edinburgh