Event-of-the-Day

Mon 12 May 2003

Photo of the event-of-the-day for Mon 12 May, 2003.

Today's event of the day is a MC event in which a muon changed its direction in the detector, and confused my event classification. Attached is a photo of the event ( run1event20295_0.ps), where the green clusters are the muon, and the blue+yellow clusters are the decay positron. I think this is rare enough to ignore, but I guess I should put in a counter to see how often this happens.


The MCTR info for this event is:
 ------ run:   1   event:   20295  geant seeds:   383572390  7  ------
 Have   4  MonteCarlo tracks
MCTR: itrack=  1 pid= 65 istop= 0 
  V=   -1.2264   -0.9942 -300.0000 
  P=     0.091     0.160    29.705 
  Q= 1 T=   -27.1 pmag=  29.706 cost=0.999981
MCTR: itrack=  1 pid= 65 istop= 1 
  V=   -1.9110   -1.8813  -49.9932 
  P=     0.000     0.000     0.000 
  Q= 1 T=    14.3 pmag=   0.000 cost=    -NaN
MCTR: itrack=  2 pid=  2 istop= 0 
  V=   -1.9110   -1.8813  -49.9932 
  P=   -39.648    21.562    17.209 
  Q= 1 T=  1914.2 pmag=  48.302 cost=0.356275
MCTR: itrack=  2 pid=  2 istop= 5 
  V=   -2.2387   11.7047   82.3849 
  P=    35.792    22.912    21.403 
  Q= 1 T=  1926.5 pmag=  47.583 cost=0.449799

The event classification with the help of MCTR and MCSP information is:
 nMCWindows:   5
 MCWindow=  1  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0  Min,MaxPl=  0  0  Type=  5  (Empty)
 MCWindow=  2  T0=  9.50000  nMu,nDK,nBeame,nDeltas  1  0  0  0  Min,MaxPl=  1  19  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=  1920.50  nMu,nDK,nBeame,nDeltas  0  1  0  0  Min,MaxPl=  5  56  Type=  3  (DownStream Decay)
 MCWindow=  5  T0=  0.000000  nMu,nDK,nBeame,nDeltas  0  0  0  0  Min,MaxPl=  0  0  Type=  5  (Empty)
 OVERALL MC EVENT TYPE=  1

The event classification using only tdc information is:
 EventType:   6  (Simple Delta Cleaned)
 Windows:   5
  window  1, T0= -10000., DC window= -10000.    -40., hits PC,DC=   0   0, Min,MaxZ=   99.0  -99.0, type=   5 (Empty)
  window  2, T0=     10., DC window=    -40.   1510., hits PC,DC=   4  36, Min,MaxZ=  -59.8  -29.4, type=   1 (Muon)
  window  3, T0=   1510., DC window=   1510.   1871., hits PC,DC=   0  28, Min,MaxZ=  -49.8  -29.8, type=   5 (Empty)
  window  4, T0=   1921., DC window=   1871.   3421., hits PC,DC=  24  77, Min,MaxZ=  -29.4   59.8, type=   8 (Downstream Decay (US delta removed))
  window  5, T0=   3421., DC window=   3421.  20000., hits PC,DC=   0   6, Min,MaxZ=  -49.8  -41.8, type=   5 (Empty)

Last modified by Blair Jamieson.