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[FIXED] Problem with UseEvtGenDirect [message #14294] Thu, 03 January 2013 16:34 Go to next message
Ronald Kunne is currently offline  Ronald Kunne
Messages: 32
Registered: October 2009
continuous participant
From: *in2p3.fr
Hi there and best wishes for 2013!

I try to run macro/run/sim_complete.C using the UseEvtGenDirect.

My .dec file looks like this:
noPhotos

Decay pbarpSystem
  1.0 J/psi pi+ pi- PHSP;
Enddecay

End


Running this results in the error message:
root.exe: /vol0/panda/pandasep12/pandaroot/pgenerators/EvtGen/EvtGenBase/EvtIntervalFlatPdf.cc:19: 
EvtIntervalFlatPdf::EvtIntervalFlatPdf(double, double): Assertion `max >= min' failed.


If I replace the "J/psi" by a "phi" everything works.

What is the problem here?

[Updated on: Wed, 10 September 2014 14:52] by Moderator

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Re: Problem with UseEvtGenDirect [message #14295 is a reply to message #14294] Thu, 03 January 2013 16:38 Go to previous messageGo to next message
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: 2.235.190*
Which momentum value are you using?
Re: Problem with UseEvtGenDirect [message #14296 is a reply to message #14295] Thu, 03 January 2013 16:49 Go to previous messageGo to next message
Ronald Kunne is currently offline  Ronald Kunne
Messages: 32
Registered: October 2009
continuous participant
From: *in2p3.fr
I used BeamMomentum =10.0;

I tried 15.0 GeV as well. Then if I add a decay like
Decay J/psi
  1.0 e+ e- VLL;
Enddecay
I get the same error message.
Without decay chain the error message is different:
EvtGen:End of decay chain.
EvtGen:Sorry, no luck finding a valid set of masses.  This may be a pathological combo
root.exe: /vol0/panda/pandasep12/pandaroot/pgenerators/EvtGen/EvtGenBase/EvtParticle.cc:466: void EvtParticle::generateMassTree(): Assertion `0' failed.





Re: Problem with UseEvtGenDirect [message #14297 is a reply to message #14296] Thu, 03 January 2013 17:13 Go to previous messageGo to next message
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: 2.235.190*
I have just tried with the latest trunk w/o any problem.

Could you please check in the log that you have the following text:

<I> PndEvtGenDirect
<I> Particle: pbarpSystem
<I> decfile: /home/spataro/sep12/pandaroot/macro/run/ronald.dec
<I> pbar-Momentum: 10
<I> Rnd Seed: -1
<I> Rnd Seed changed to 3319
EvtGen:Initializing EvtGen
EvtGen:Storing known decay models
Will register EvtPythia
EvtGen:Main decay file name  :/home/spataro/sep12/pandaroot/pgenerators/EvtGen/DECAY.DEC
EvtGen:PDT table file name   :/home/spataro/sep12/pandaroot/pgenerators/EvtGen/evt.pdl
EvtGen:Initializing RadCorr=PHOTOS
EvtGen:No RadCorr engine given in EvtGen::EvtGen constructor, will use default EvtPHOTOS.
EvtGen:In readDecayFile, reading:/home/spataro/sep12/pandaroot/pgenerators/EvtGen/DECAY.DEC
EvtGen:As requested, PHOTOS will be turned on.


and

EvtGen:In readDecayFile, reading:/home/spataro/sep12/pandaroot/macro/run/ronald.dec
EvtGen:As requested, PHOTOS will be turned off.
EvtGen:Given allowed decays, resetting minMass pbarpSystem 1.48 to 3.37581
EvtGen:Reading /home/spataro/sep12/pandaroot/macro/run/ronald.dec to override decay table.

############# Generating with following conditions:

incident 4-mom : (10.9822, 0, 0, 10), m = 4.53966

######################


and copy it here?
Re: Problem with UseEvtGenDirect [message #14298 is a reply to message #14297] Thu, 03 January 2013 17:22 Go to previous messageGo to next message
Ronald Kunne is currently offline  Ronald Kunne
Messages: 32
Registered: October 2009
continuous participant
From: *in2p3.fr
Good call, Stefano!

When I checked this, I saw that it uses "mom" and not "Beam momentum" to determine the incident beam.

So it's solved. Thanks very much.

Greetings,
Ronald
Re: Problem with UseEvtGenDirect [message #14299 is a reply to message #14298] Thu, 03 January 2013 17:24 Go to previous message
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: 2.235.190*
"mom" is the momentum for the generator, i.e. pbar momentum for evtgen, particle gun momentum for box, pbar momemtum for dpm.
BeamMomentum is the momentum for the scaling of the dipole field.
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