Preparation for Pythia8315

[pzhristov]

Mask the isospin information in the PDG code.
Use nCollND() instead of the deprecated nCollNDTot().

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[alibuild]

Error while checking build/O2/fullCI_slc9 for 8910717 at 2025-05-19 01:17:

## sw/BUILD/O2Physics-latest/log
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:


## sw/BUILD/O2-full-system-test-latest/log
Detected critical problem in logfile sim.log
sim.log-[01:17:07][FATAL] Inconsistency in primary particles treated 144 vs expected 145
[ERROR] SHUTTING DOWN DUE TO SIGNALED EXIT IN COMPONENT 5213
[01:17:07][FATAL] Inconsistency in primary particles treated 144 vs expected 145


## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
++ GRERR=1
++ [[ 1 == 0 ]]
++ mkdir -p /sw/INSTALLROOT/7ec3451143fc2db880202546390c3e002ae60759/slc9_x86-64/o2checkcode/1.0-local33/etc/modulefiles
++ cat
--

Full log here.

[pzhristov]

@sawenzel I am not sure why the fullCI fails, the inconsistency between the number of expected and processed primary particles is not related to the changes in the PR.

[sawenzel]

@pzhristov : The fullCI passes with your mods. Now the question is what will happen when we go to Pythia8314, where the change will be applied again?

[pzhristov]

@sawenzel The problem is that we add some "nuclei" with isospin one in the code itself, and I did not see them when checking the external file. I can change the logic and mask only if the isospin is 9.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 83d2122 at 2025-05-28 17:42:

## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
/sw/SOURCES/O2/14286-slc9_x86-64/0/Generators/src/GeneratorPythia8.cxx:661:39: error: statement should be inside braces [readability-braces-around-statements]
++ [[ 0 == 0 ]]
++ exit 1
--

Full log here.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 9ea3a70 at 2025-05-29 07:49:

## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
/sw/SOURCES/O2/14286-slc9_x86-64/0/Generators/src/GeneratorPythia8.cxx:661:39: error: statement should be inside braces [readability-braces-around-statements]
++ [[ 0 == 0 ]]
++ exit 1
--

Full log here.

[alibuild]

Error while checking build/O2/fullCI_slc9 for d35f2ca at 2025-06-01 02:10:

## sw/BUILD/O2Physics-latest/log
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:


## sw/BUILD/O2-full-system-test-latest/log
Detected critical problem in logfile sim.log
sim.log-[02:10:36][FATAL] Inconsistency in primary particles treated 144 vs expected 145
[ERROR] SHUTTING DOWN DUE TO SIGNALED EXIT IN COMPONENT 4060
[02:10:36][FATAL] Inconsistency in primary particles treated 144 vs expected 145


## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
++ GRERR=1
++ [[ 1 == 0 ]]
++ mkdir -p /sw/INSTALLROOT/edfc5998e178f4d53424d0031904ccb956b650c3/slc9_x86-64/o2checkcode/1.0-local36/etc/modulefiles
++ cat
--

Full log here.

[pzhristov]

Since isospin 9 is used to indicate beam remnants, it cannot simply be masked. Additional changes will address this issue.

[pzhristov]

@sawenzel @jackal1-66 I confirm that these changes work well with Pythia8.315 and the beam remnants are treated correctly in Geant4 (no exceptions). It is possible that there was a bug in the status code introduced in 8.314 that was fixed later in 8.315, but I did not investigate further. The compilation error on aarch64 is in Monitoring and not related to this PR. If you agree, I will merge it and prepare a PR to bump Pythia8