[PWGHF] Add centrality information to MC collisions#13940
[PWGHF] Add centrality information to MC collisions#13940stefanopolitano merged 1 commit intoAliceO2Group:masterfrom
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1, Added centrality for MC collisions and updated relevant event split and event loose processing functions.
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Tao-Fang
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NicoleBastid,
alibuild,
apalasciano,
deepathoms,
fcatalan92,
fcolamar,
fgrosa,
gluparel,
hahassan7,
jpxrk,
mfaggin,
mmazzilli,
stefanopolitano,
vkucera and
zhangbiao-phy
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| #include "PWGHF/Core/HfHelper.h" | ||
| #include "PWGHF/DataModel/CandidateReconstructionTables.h" | ||
| #include "PWGHF/DataModel/CandidateSelectionTables.h" | ||
| #include "PWGLF/DataModel/mcCentrality.h" |
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Hi @Tao-Fang ! Thanks for the development. This is fine for me, I just have a doubt about this line: do you really need to include the centrality from LF? Could you not use the centrality table from HF?
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Hi @stefanopolitano, thanks for your comment, I think the structure with mccentrality seems fine, which has same cite on other HF codes like candidateCreator3Prong.cxx, candidateCreatorCascade.cxx, and taskOmegac0ToOmegaPi.cxx
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Hi @stefanopolitano, the centrality from the LF task assigns a value to all generated events (also those not reconstructed) according to the generated particles in the FT0 acceptance, and it has been calibrated to match the data. This information is needed, e.g., to compute the event loss as a function of multiplicity, where you need the multiplicity interval also for events not reconstructed.
What is done in HF is to assign to the generated collision the centrality of the associated reconstructed collision with the larger number of contributors (to address split vertices). BTW, I'm not sure how much we can trust the centrality intervals obtained in this way, given also that we are using enriched HF MCs.
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Hi @fcatalan92! Thanks for the clarification (and sorry for the delay). Good for me!
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1, Added centrality for MC collisions and updated relevant event split and event loose processing functions.