GEANT4 4.9.5p01 bug
A bug has been discovered by mu2e folks in geant4 4.9.5p01 - the version we are currently using in development (and tag S12-10-04, S12-10-07).
Here's the problem:
Some particles created by the physics process named hadElastic are
born with a creation time earlier than that of their mother, sometimes
by many thousands of ns! This completely messes up the aggregation of
steps into hits.
The bug is not present in 4.9.4.p02 and nor in 4.9.5.p02, which has been released.
We will get new tarballs as soon as possible.
#2 Updated by Gavin Davies over 7 years ago
Xinchun, I am not aware of GEANT4 addressing the crazy electrons in air showers. If you are aware of a fix and can verify please let me know, otherwise we will continue to use the vacuum gdml files.
In order to use the Air files I need to see verifications.