PWGHF: fix PDG code of L(1520) in Lc decays.

[mfaggin]

@fcatalan92 @fgrosa @fcolamar @stefanopolitano @DelloStritto triggered by a couple of unexpected things in analysis, I started debugging a bit our MC productions and I found that apparently the PDG code of the Lambda(1520) is wrong in our PYTHIA configurations.

Apparently the correct PDG code is 102134 as listed in the manual https://pythia.org/latest-manual/Welcome.html >> Particles and Decays >> Particle Data , and not 3124 as written when adding and forcing the decay Lc --> Lambda(1520)pi. For some reasons, the correct PDG code was there already for the forcing of the Lambda(1520) --> pK.

Just as an example, I have tested it with the Pb-Pb generator MC/config/PWGHF/external/generator/generator_pythia8_embed_hf.C using the bash script here https://cernbox.cern.ch/s/BdlYlDpPXFRhZmy (10 generated events, w/o anchoring and w/o embedding), forcing all Lc hadrons to decay into the channel Lc --> Lambda(1520)pi (see thic config https://cernbox.cern.ch/s/WxM6pgRGcc2BSYT, which is https://github.com/AliceO2Group/O2DPG/blob/master/MC/config/PWGHF/pythia8/generator/pythia8_charmhadronic_with_decays_Mode2_hardQCD_5TeV.cfg just commenting out all other decays) and then I checked the content with this tester https://cernbox.cern.ch/s/82E7SFp01j3nU0m (which is exactly this one MC/config/PWGHF/ini/tests/GeneratorHF_D2H_ccbar_and_bbbar_PbPb.C a bit modified just to monitor this specific aspect).
Below a screenshot of one of my tests:

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[fcatalan92]

Hi @mfaggin, nice that you spotted this issue. From a quick grep I found another PWGHF file not yet fixed PWGHF/pythia8/decayer/force_hadronic_D.cfg, could you modify it too?
Moreover, the same issue affects configurations under PWGGAJE, PWGDQ, PWGEM, PWGLF. Maybe we should propagate this information to the relevant people.

[mfaggin]

thanks @fcatalan92 , I've fixed it also in the additional file that you found.
Concerning your second point, I would agree with you. What about writing a mail when this PR will be merged?

[fgrosa]

Hi @mfaggin @fcatalan92 thanks! Regarding force_hadronic_D.cfg, I think we should remove it because it is not used and might create confusion in the future. We can do it in another iteration though.

[fcatalan92]

@AliceO2Group/reviewers-pwg-je, @AliceO2Group/reviewers-pwg-dq, @AliceO2Group/reviewers-pwg-em, @AliceO2Group/reviewers-pwg-lf
Please note this fix for the PDG code of the Lambda(1520), the same problem is present in other configuration files for your PWGs

[fgrosa]

label async-pp-2023-apass4 was removed by mistake, readding