Optimization of pi0 vs. CTB sum for minB CuCu data Tower-only algo

  • used ~237,000 minB=66007 CuCu events from run R6034014 +R6035106
  • pedestals from R6026058
  • tower gains: ideal 60 GeV E_T=4096
  • range set set on CTB sum
  • pi0 mass limit [0.02, 0.22], background from mixed events subtracted.

    25 < CTBmax < 50
    nEve=5.4K of 237K
    Nrec=45, Nmix=38 mixFac=0.973
    Npi0=8 + / - 9
    s2b=0.22 + / - 0.049 mass/MeV=135 + / - 2 ,
    sig/MeV 4 + / - 9 nPi0/nEve=0.1%

    50 < CTBmax < 100
    nEve=9K of 237K
    Nrec=204, Nmix=121 mixFac=0.923
    Npi0=92 + / - 18
    s2b=0.83 + / - 0.100 mass/MeV=125 + / - 5 ,
    sig/MeV 24 + / - 4 nPi0/nEve=1%

    100 < CTBmax < 200
    nEve=15K of 237K
    Nrec=718, Nmix=533 mixFac=0.934
    Npi0=220 + / - 34
    s2b=0.44 + / - 0.026 mass/MeV=133 + / - 7 ,
    sig/MeV 33 + / - 4 nPi0/nEve=1.5%

    200 < CTBmax < 400
    nEve=24K of 237K
    Nrec=2819, Nmix=2281 mixFac=0.977
    Npi0=591 + / - 71
    s2b=0.27 + / - 0.008 mass/MeV=123 + / - 5 ,
    sig/MeV 28 + / - 3 nPi0/nEve=2.5%

    400 < CTBmax < 800
    nEve=33K of 237K
    Nrec=9580, Nmix=8541 mixFac=0.985
    Npi0=1170 + / - 134
    s2b=0.14 + / - 0.002 mass/MeV=133 + / - 4 ,
    sig/MeV 28 + / - 2 nPi0/nEve=3.5%

    800 < CTBmax < 1600
    nEve=40K of 237K
    Nrec=27033, Nmix=25332 mixFac=0.997
    Npi0=1767 + / - 229
    s2b=0.07 + / - 0.001 mass/MeV=130 + / - 4 ,
    sig/MeV 26 + / - 2 nPi0/nEve=4.4%

    1600 < CTBmax < 3200
    nEve=46K of 237K
    Nrec=47667, Nmix=42974 mixFac=1.002
    Npi0=4621 + / - 301
    s2b=0.11 + / - 0.001 mass/MeV=119 + / - 3 ,
    sig/MeV 27 + / - 1 nPi0/nEve=10%

    3200 < CTBmax < 6400
    nEve=48K of 237K
    Nrec=33949, Nmix=26704 mixFac=0.992
    Npi0=7453 + / - 245
    s2b=0.28 + / - 0.002 mass/MeV=121 + / - 2 ,
    sig/MeV 29 + / - 1 nPi0/nEve=16%
    50 < CTBmax < 200

    3200 < CTBmax < 6400

    The 2D plot of X-Y for high energy clusters yielding correct pi0 mass PS-plot
    The only 2 towers masked out in the DB are: 06TA03 and 07TC05
    This is the vew from the outside, sectors change clockwise.

    CTB sum spectrum for minB trigger


    CTB sum spectrum for EHT10 trigger


    CTB sum spectrum for EHT19 trigger



    (The last two plots are not swapped, I checked it twice - Jan)