TkrRecon Update
Mar 23, 2004

• Update of track fit c2
  • See the original presentation of the track fit "sea trials" by Bill Atwood, given to the  Analysis Group on August 12, 2002,  here.
     
  • See update on "current" status from last thursday's software meeting here.
     
  • Recent: Have been doing a process of elimination search for the "difference" between the current code and the code circa Summer 2002. Currently focusing on "non-interacting" muons in the simulation (all muon interactions have been turned off), and no propagator/MS error matrix in the fit. This results in some very interesting distributions. Below is a summary with 10 GeV non-interacting muons generated with cos(theta) ~ .7 and over all angles in phi (note that in these tests energy doesn't matter). This cos(theta) was chosen since it picks the area with the largest chi-square discrepancy in Bill's current plots.
    
    
    
     
    • Upper Left plot: Chi-square plot
    • Upper Right plot: Chi-square vs number of hits on the track
    • Middle Left plot: Chi-square vs cos(theta)
    • Middle Right plot: Chi-square vs phi
    • Lower Left plot: Chi-square vs x slope
    • Lower Right plot: Chi-square vs y slope
       
  • The above plots done with "standard" FIXED spatial errors and are interesting, clearly the spatial error assignment (constant errors) is wrong.
     
  • See Leon presentation on thursday
     
  • An interesting event:
    
    
     

T.Usher Last Modified: 03/24/2004 21:15