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[Sphenix-software-l] Deterioration in upsilon invariant mass resolution

From: Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>
To: Tony Frawley <frawley AT fsunuc.physics.fsu.edu>, "Huang, Jin" <jhuang AT bnl.gov>, "Osborn, Joe" <osbornjd AT ornl.gov>, "sphenix-software-l AT lists.bnl.gov" <sphenix-software-l AT lists.bnl.gov>
Subject: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution
Date: Fri, 8 Jan 2021 10:13:44 -0700

Hi Tony, others,

with latest code I see a terrible upsilon invariant mass resolution. (while using GenFit toolchain, which has not change for month). This was not the case on december 21st.

Looking back at the comits since then I think I have identified the culprit as being commit 784ae256185aa9c77d4604c59f0cf1dd1cdc3548 (the optimization of PHG4TPCElectronDrit) Plots attached represent the Upsilon inv mass resolution before (InvMassUpsilon_upsilon_truth_micromegas_nominal-old.pdf) and after (InvMassUpsilon_upsilon_truth_micromegas_nominal-new.pdf) the said bunch of commits.

Similar deterioration is seen for the track momentum resolution and for the cluster residual width (cluster - truth) in the TPC (which is what pointed me to this commit in the first place). Can you double-check ?

Don't hesitate to ask if you need more information from my side.

Best,

Hugo

Attachment: InvMassUpsilon_upsilon_truth_micromegas_nominal-new.pdf
Description: Adobe PDF document

Attachment: InvMassUpsilon_upsilon_truth_micromegas_nominal-old.pdf
Description: Adobe PDF document

[Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Hugo Pereira Da Costa, 01/08/2021
- Re: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Anthony Frawley, 01/08/2021
  - Re: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Hugo Pereira Da Costa, 01/08/2021
    - Re: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Huang, Jin, 01/08/2021
      - Re: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Anthony Frawley, 01/08/2021
        
        Re: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Hugo Pereira Da Costa, 01/08/2021
        
        Re: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Anthony Frawley, 01/08/2021
        
        Re: [Sphenix-software-l] Deterioration in upsilon invariant mass resolution, Huang, Jin, 01/08/2021