Shower Shape Distributions - Triple Gaussian Fits (Revised)

 Shower shape fitting procedure:

 

  1. Fit with single Gaussian shape using 3 highest strips
  2. Fit with double Gaussian using 5 strips from each side of the peak [11 strips total]
    First Gaussian parameters are fixed from the step above
  3. Re-fit with double Gaussian with initial parameters from step 2 above
  4. Fit with triple Gaussian [fit range is 15 strips]
    Initial parameters for the first two Gaussian are fixed from step 3 above
  5. Fit with triple Gaussian with initial parameters from step 4 above 
    (releasing all parameters except mean values)

Fitting function "[0]*(exp ( -0.5*((x-[1])/[2])**2 )+[3]*exp ( -0.5*((x-[4])/[5])**2 )+[6]*exp ( -0.5*((x-[7])/[8])**2 ))+c"

 

All of these distributions are for first preshower bin (Pre1 = 0, Pre2 =0)

u plane  

 

    

v plane  

    

u plane  (Sum of sectors 1, 4, 7 and 10)

    

v plane  (Sum of sectors 1, 4, 7 and 10)

   

 

u plane  (Sum of sectors 2, 5, 8 and 11)

    

 

v plane  (Sum of sectors 2, 5, 8 and 11)

     

u plane  (Sum of sectors 3, 6, 9 and 12)

    

v plane  (Sum of sectors 3, 6, 9 and 12)

    

 

 

Eta Dependence (eta <= 1.4)

  

Eta Dependence (eta > 1.4)

   

 

Energy dependence (E<=16GeV)

    

 

Energy dependence (E >16GeV)