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[FIXED] Problem with UseEvtGenDirect [message #14294]

Thu, 03 January 2013 16:34

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

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: 2.235.190*

Which momentum value are you using?

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Re: Problem with UseEvtGenDirect [message #14296 is a reply to message #14295]

Thu, 03 January 2013 16:49

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.

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Re: Problem with UseEvtGenDirect [message #14297 is a reply to message #14296]

Thu, 03 January 2013 17:13

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?

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Re: Problem with UseEvtGenDirect [message #14298 is a reply to message #14297]

Thu, 03 January 2013 17:22

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

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Re: Problem with UseEvtGenDirect [message #14299 is a reply to message #14298]

Thu, 03 January 2013 17:24

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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