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Bug #2852

No code takes responsibility for decaying charm (and B) mesons

Added by Robert Hatcher over 7 years ago. Updated over 3 years ago.

Status:
Rejected
Priority:
Normal
Category:
-
Start date:
05/15/2012
Due date:
% Done:

50%

Estimated time:
Duration:

Description

GENIE currently leaves charmed mesons/baryons (e.g. D, etc) as part of the final state of the interaction (status code = 1) to allow then to decay during propagation. Geant4, for reasons to do with correlated production and spin kinematics important for other experiments, does not come configured out-of-the-box to decay these heavy mesons/baryons. It was suggested by the G4 experts that the code should interface to an existing package such as pythia6 (or pythia8).

G4Decay::DoIt  : decay table not defined  for lambda_c+

*** G4Exception : No Decay Table
     issued by : G4Decay::DecayIt
Decay table is not defined
*** This is just a warning message.

Sometimes the particle is a D0, D+, D-, etc


Related issues

Related to NOvA-ART - Bug #3056: Tau particles not decayed Rejected10/19/201211/12/2012

History

#1 Updated by Robert Hatcher over 7 years ago

  • Status changed from New to Assigned
  • Assignee set to Robert Hatcher
  • % Done changed from 0 to 50

A GENIE based (vs. Geant4) solution has been implemented through the use of a modified UserPhysicsOptions.xml file. The file is made available to GENIE through the addition of the file location to the GXMLPATH environment variable. To enable this, use the corresponding UPS product genie_phyopt, i.e.:

   setup genie        v3665 -q e2:debug
   setup genie_phyopt v3665 -q dkcharmtau

#2 Updated by Alexander Himmel over 3 years ago

  • Status changed from Assigned to Rejected


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