ITS Beam background studies - first workflow by nicolovalle · Pull Request #15268 · AliceO2Group/AliceO2

nicolovalle · 2026-04-10T13:55:36Z

This introduces a first working but preliminary workflow to track anomalous clusters in the ITS and possibly match the events with other detector (for the moment, ZDC).

Example how to run it:

ext_search=";RecoParamZDC.setExtendedSearch=true;RecoParamZDC.doExtendedSearch=false"
eve_store=";RecoParamZDC.setStoreEvPileup=true;RecoParamZDC.doStoreEvPileup=true"

o2-ctf-reader-workflow -b --ctf-input list.dat --remote-regex "^alien:///alice/data/.+" --copy-cmd no-copy --onlyDet ITS | \
o2-zdc-digits-reco --disable-mc -b --disable-root-output --disable-root-input --disable-baseline-calib --reco-verbosity=1 --configKeyValues "${ext_search}${eve_store}" | \
o2-its-standalone-postprocessing-workflow --disable-mc --input-from-upstream --its-beambkg-study --cluster-sources ITS --track-sources "" -b --run

alibuild · 2026-04-10T15:18:09Z

Error while checking build/O2/fullCI_slc9 for 856bf0d at 2026-04-10 17:18:

## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:564:30: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:566:38: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:568:11: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:571:30: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:573:39: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:575:11: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:584:57: error: prefer transparent functors 'greater<>' [modernize-use-transparent-functors]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:640:18: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:642:18: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:644:18: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:646:19: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:648:19: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:650:20: error: statement should be inside braces [readability-braces-around-statements]
++ [[ 0 == 0 ]]
++ exit 1
--

Full log here.

alibuild · 2026-04-10T19:14:04Z

Error while checking build/O2/fullCI_slc9 for 96314ef at 2026-04-10 21:14:

## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:564:30: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:566:38: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:568:11: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:571:30: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:573:39: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:575:11: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:584:57: error: prefer transparent functors 'greater<>' [modernize-use-transparent-functors]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:640:18: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:642:18: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:644:18: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:646:19: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:648:19: error: statement should be inside braces [readability-braces-around-statements]
/sw/SOURCES/O2/slc9_x86-64-slc9_x86-64/0/Detectors/ITSMFT/ITS/postprocessing/studies/src/ITSBeamBackgroundStudy.cxx:650:20: error: statement should be inside braces [readability-braces-around-statements]
++ [[ 0 == 0 ]]
++ exit 1
--

Full log here.

alibuild · 2026-04-14T04:50:02Z

Error while checking build/O2/fullCI_slc9 for 6b1be6a at 2026-04-15 07:44:

## sw/BUILD/O2Physics-latest/log
c++: fatal error: Killed signal terminated program cc1plus
ninja: build stopped: subcommand failed.


## 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/80339931272208de107362b1b931e5d440ea90b6/slc9_x86-64/o2checkcode/1.0-local677/etc/modulefiles
++ cat
--

Full log here.

fprino · 2026-04-13T15:30:54Z

+    }
+
+    // shifting by 60 bc
+    int eff_bc = Tbc + 60;


Is this 60 bc shift a fixed number that we can leave hard coded? Alternatively, it can be a settable parameter.

fprino · 2026-04-13T15:32:47Z

+    int eff_bc = Tbc + 60;
+    long eff_orbit = Torbit;
+    if (eff_bc > 3564) {
+      eff_bc -= 3564;


This will set eff_bc in the range 1 - 3564. Is this correct? Or should it be 0 - 3563?

ITS Beam background studies - first workflow

26a6310

nicolovalle requested review from fprino, mconcas, mcoquet642 and shahor02 as code owners April 10, 2026 13:55

alibuild mentioned this pull request Apr 10, 2026

Please consider the following formatting changes to #15268 nicolovalle/AliceO2#7

Closed

fix clang

856bf0d

fix CI error

96314ef

nicolovalle added 2 commits April 11, 2026 09:42

Fix statements in braces

ca29c9f

leftover...

6b1be6a

fprino reviewed Apr 16, 2026

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ITS Beam background studies - first workflow#15268

ITS Beam background studies - first workflow#15268
nicolovalle wants to merge 5 commits intoAliceO2Group:devfrom
nicolovalle:its-bkg-skeleton

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alibuild commented Apr 14, 2026 •

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