Sphenix-calibration-l mailing list

[Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>]

Hi Takao,

Thanks for the comments !

On 9/18/20 7:46 AM, Takao Sakaguchi via sPHENIX-calibration-l wrote:

      Dear Hugo,
      
       Thanks for making and posting the set of very nice slides. Just
      a few comments below.
      
      - slide 10: They are important results, and should be highlighted.
      I wonder if you can make a plot of the peak values and width
      for positive and negative as a function of pT.

Done (although in the backups)

I would not try to take too much out of this slide because of the limitations in slide7. To me the message is that we absolutely need to correct for distortions to get physics out of the TPC. But we new that already right ? This was an attempt at quantifying it a little. However this will get much worse once you include the O(cm) static distortion from Ross, and event-by-event fluctuations. So ...

Ultimately this would be more interesting I think, when redoing the same plots considering the fluctuations only.

     - slide
      12: In the middle, delta r phi --> r delta phi
      
    
    Fixed, thanks ! (in fact, by construction we assign r_track ==
    r_cluster (and also r_truth == r_cluster) so that there is no
    ambiguity in this.
     - By the
      way, since you showed the chi^2 formula in the slide 12,
      it would be instructive to show the actual values for three cases
      in the slide 13, at given r (e.g., r=30 and/or 60cm)

Will do. For the chisquare to make sense though, this requires to have the proper errors on the clusters, and on the tracks.

      - slide 15: One observation from the plots shown here is the
      width change, but the other observation is the shift of mass
      peak. This may be also worth pointing out?
    
    Will do orally. 
     
       Thanks again!
       
      Takao

On 9/17/20 4:29 PM, Hugo Pereira Da Costa via sPHENIX-calibration-l wrote:

      Hi all, 
        
        attached is a first draft of the slides for tomorrow's General
        Meeting 
        
        Comments/corrections/additions welcome, 
        
        
        Hugo 
        
        
        
        
        
        
_______________________________________________
sPHENIX-calibration-l mailing list
sPHENIX-calibration-l AT lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/sphenix-calibration-l
      
      
      
      
_______________________________________________
sPHENIX-calibration-l mailing list
sPHENIX-calibration-l AT lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/sphenix-calibration-l