Event-of-the-Day

Sun 4 May 2003

Photo of the event-of-the-day for Sun 4 May, 2003.
Sunday's event of the day is a MC event for which the number of PC hits was too large (more than 200 in default GEANT settings). This caused a beam positron in an event with a high angle decay positron to be missing downstream PC hits, and thus got called the wrong thing. Presumably increasing this array bound in GEANT (as I already did for DC hits in my copy of GEANT) would get rid of this problem. Attached is a photo of the event (run1event6816_0.ps).

The MCTR info for this event is:
 ------ run:   1  event:   6816  geant seeds:   478859529  2  ------
 Have   26  MonteCarlo tracks
MCTR: itrack=  1 pid= 65 istop= 0
  V=   -3.4240   -0.6936 -300.0000
  P=     0.221     0.014    29.673 Q= 1
  T=   -27.2 pmag=  29.674 cost=0.999972
MCTR: itrack=  1 pid= 65 istop= 1
  V=    0.7046    0.4678    0.0186
  P=     0.000     0.000     0.000 Q= 1
  T=    13.3 pmag=   0.000 cost=    -NaN
MCTR: itrack=  2 pid=  2 istop= 0
  V=    1.4128   -1.2992 -300.0000
  P=    -0.181    -0.180    29.751 Q= 1
  T=  6837.5 pmag=  29.752 cost=0.999963
MCTR: itrack=  2 pid=  2 istop=98
  V=   -0.2674   -3.0678  151.3196
  P=    -1.792    -2.528    29.031 Q= 1
  T=  6852.7 pmag=  29.196 cost=0.994352
MCTR: itrack=  3 pid=  2 istop= 0
  V=    0.7046    0.4678    0.0186
  P=    50.702    -6.610     1.322 Q= 1
  T=  8349.9 pmag=  51.148 cost=0.025843
MCTR: itrack=  3 pid=  2 istop= 1
  V=   -2.2791   -7.9505  -80.0652
  P=     0.000     0.000     0.000 Q= 1
  T=  8471.1 pmag=   0.000 cost=    -NaN
MCTR: itrack=  5 pid=  3 istop= 0
  V=   -8.2630   -6.8305    9.9672
  P=     0.505     0.367    -0.459 Q=-1
  T=  8372.0 pmag=   0.774 cost=-.592505
MCTR: itrack=  5 pid=  3 istop= 2
  V=   -8.2316   -6.5905    0.0093
  P=     0.000     0.000     0.000 Q=-1
  T=  8372.9 pmag=   0.000 cost=    -NaN
MCTR: itrack=  6 pid=  3 istop= 0
  V=   -7.6030  -10.9287   29.1944
  P=    -0.580     0.753    -0.916 Q=-1
  T=  8403.7 pmag=   1.320 cost=-.693951
MCTR: itrack=  6 pid=  3 istop= 2
  V=   -8.0602  -11.5329  -79.6993
  P=     0.000     0.000     0.000 Q=-1
  T=  8410.9 pmag=   0.000 cost=    -NaN
MCTR: itrack=  7 pid=  1 istop= 0
  V=    2.4832   -0.8621    4.7382
  P=     9.706    -4.165     0.129 Q= 0
  T=  8442.1 pmag=  10.563 cost=0.012194
MCTR: itrack=  7 pid=  1 istop= 5
  V=   15.6030   -6.4927    4.9124
  P=     9.706    -4.165     0.129 Q= 0
  T=  8442.6 pmag=  10.563 cost=0.012194
MCTR: itrack=  8 pid=  3 istop= 0
  V=   -2.1159  -11.2282    4.5788
  P=    -0.273     0.864     0.338 Q=-1
  T=  8442.6 pmag=   0.967 cost=0.349723
MCTR: itrack=  8 pid=  3 istop= 2
  V=   -2.1556  -11.7258   77.8846
  P=     0.000     0.000     0.000 Q=-1
  T=  8450.9 pmag=   0.000 cost=    -NaN
MCTR: itrack=  9 pid=  3 istop= 0
  V=    2.8227  -10.8888    0.8002
  P=    -0.091    -0.040    -0.331 Q=-1
  T=  8447.1 pmag=   0.346 cost=-.957677
MCTR: itrack=  9 pid=  3 istop= 2
  V=    2.8575  -10.9524    0.0222
  P=     0.000     0.000     0.000 Q=-1
  T=  8447.2 pmag=   0.000 cost=    -NaN
MCTR: itrack= 10 pid=  3 istop= 0
  V=   -2.7411   -1.6222    0.0076
  P=     0.375    -0.229     0.103 Q=-1
  T=  8451.0 pmag=   0.451 cost=0.228733
MCTR: itrack= 10 pid=  3 istop= 2
  V=   -2.6965   -1.5611   -0.8000
  P=     0.000     0.000     0.000 Q=-1
  T=  8452.2 pmag=   0.000 cost=    -NaN
MCTR: itrack= 11 pid=  1 istop= 0
  V=   -2.7380   -1.6200    0.0072
  P=     3.665     2.522    -0.420 Q= 0
  T=  8451.0 pmag=   4.468 cost=-.093929
MCTR: itrack= 11 pid=  1 istop= 5
  V=   13.7979    9.7585   -1.8865
  P=     3.665     2.522    -0.420 Q= 0
  T=  8451.6 pmag=   4.468 cost=-.093929
MCTR: itrack= 12 pid=  1 istop= 0
  V=   -3.0176   -8.8281  -34.9421
  P=   -12.846    10.190    -1.565 Q= 0
  T=  8464.5 pmag=  16.472 cost=-.095036
MCTR: itrack= 12 pid=  1 istop= 5
  V=  -16.7713    2.0820  -36.6182
  P=   -12.846    10.190    -1.565 Q= 0
  T=  8465.0 pmag=  16.472 cost=-.095036
MCTR: itrack= 13 pid=  3 istop= 0
  V=   -1.9962   -8.4443  -80.2131
  P=    -0.044     0.562     0.153 Q=-1
  T=  8471.0 pmag=   0.584 cost=0.261341
MCTR: itrack= 13 pid=  3 istop= 2
  V=   -1.9965   -8.4243  -80.2378
  P=     0.000     0.000     0.000 Q=-1
  T=  8471.1 pmag=   0.000 cost=    -NaN
MCTR: itrack= 14 pid=  3 istop= 0
  V=   -2.3512   -8.3214  -80.0126
  P=     0.240     0.447    -0.028 Q=-1
  T=  8471.1 pmag=   0.508 cost=-.054333
MCTR: itrack= 14 pid=  3 istop= 2
  V=   -2.3483   -8.3157  -80.0129
  P=     0.000     0.000     0.000 Q=-1
  T=  8471.1 pmag=   0.000 cost=    -NaN

The MC classification is:
 nMCWindows:   7
 MCWindow=  1  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0 Min,MaxPl=  0  0  Type=  5  (Empty)
 MCWindow=  2  T0=  4.50000  nMu,nDK,nBeame,nDeltas  1  0  0  0 Min,MaxPl=  1  29  Type=  1  (Muon)
 MCWindow=  3  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0 Min,MaxPl=  0  0  Type=  5  (Empty)
 MCWindow=  4  T0=  6849.00  nMu,nDK,nBeame,nDeltas  0  0  1  0 Min,MaxPl=  1  56  Type=  4  (Beam Positron)
 MCWindow=  5  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0 Min,MaxPl=  0  0  Type=  5  (Empty)
 MCWindow=  6  T0=  8351.00  nMu,nDK,nBeame,nDeltas  0  1  0  5 Min,MaxPl=  1  40  Type=  10  (Downstream Decay (Scatter back upstream))
 MCWindow=  7  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0 Min,MaxPl=  0  0  Type=  5  (Empty)
 OVERALL MC EVENT TYPE=  11

And the usual Classification from TDC info gets the wrong answer, and
is:
 EventType:   27  (Other)
 Windows:   7
  window  1, T0= -10000., DC window= -10000.    -45., hits PC,DC=   0 0, Min,MaxZ=   99.0  -99.0, type=   5 (Empty)
  window  2, T0=      5., DC window=    -45.   1504., hits PC,DC=   6 24, Min,MaxZ=  -59.7   -0.2, type=   1 (Muon)
  window  3, T0=   1504., DC window=   1504.   6799., hits PC,DC=   6 25, Min,MaxZ=  -59.7   -0.6, type=   5 (Empty)
  window  4, T0=   6849., DC window=   6799.   8301., hits PC,DC=   3 23, Min,MaxZ=   -0.2   49.8, type=   8 (Downstream Decay (US delta removed))
  window  5, T0=   8301., DC window=   8301.   8301., hits PC,DC=   0 0, Min,MaxZ=   99.0  -99.0, type=   5 (Empty)
  window  6, T0=   8351., DC window=   8301.   9851., hits PC,DC= 126 541, Min,MaxZ=  -59.7   49.4, type=  20 (Dont know)
  window  7, T0=   9851., DC window=   9851.  20000., hits PC,DC=   0 4, Min,MaxZ=    4.6   29.8, type=   5 (Empty)
 Hits DC,PC,PCadc,SC,SCadc=  1135  200  0  9  3

-Blair
Last modified by Blair Jamieson.