[PWGHF] new files for production of electrons from heavy-flavour hadron decays

[jpxrk]

First commit for production of electrons from heavy-flavour hadron decays.

[github-actions]

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[stefanopolitano]

Hi @jpxrk! Thanks a lot for your contribution. I don't have major comments, just a question for myself as I am not an HFe expert. By setting the onIfAny you enable all possible HF decays containing at least a e-,+ that might have a resonant state (like K*, phi, rho0, omega, etc.) for which you do not set any requirement on the decay as you do for eta and pi0, +. Is this intended? Thanks in advance for the clarification!

[jpxrk]

Dear @stefanopolitano, I intended to keep only electrons from heavy-flavour hadron semileptonic decays and electrons from primary pi0 and eta decays. Thank you for poining out that I don't want electrons from intermediate resonances. I will modify the cfg file and push it again.

[stefanopolitano]

Hi @jpxrk! Thanks! However, I still have a couple of questions. I thought the main motivation behind having the pi and eta was related to their large contribution as sources of background in your sample. Isn't that the case? Also, in the latest version of the config the decay are enabled only when electrons or neutrinos are present, but I thought you wanted to store decays with either electrons or positrons. Can you please clarify? Thanks a lot!

[jpxrk]

Hello @stefanopolitano, yes I included the pi0 and eta in order to estimate their contribution as a background source. Regarding the second point, my intention was to include both electron and positron, since I initially though I had to explicitly consider both particle and anti-particle production, but I realised that PYTHIA automatically takes case of the anti-particle channels as well. Therefore, to include the semi-leptonic decays of heavy-flavour hadrons, I only specified the decays involving electron together with neutrino. Thank you.

[stefanopolitano]

Hi @jpxrk ! Thanks a lot for the clarification. Good for me!