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LCIO::EVENT::TrackerHit quality information [message #1916] Wed, 03 March 2010 10:45 Go to previous message
rosemann
Messages: 41
Registered: March 2009
Location: hamburg.de
Hi,

in the recent LCIO version there is an additional data member for the Trackerhit; the quality (with accessor/mutator). The layout for the usage was proposed formerly, but seems incomplete to me:

  • bit 0: contains at least one broken channel.
  • bit 1: at least one pulse contributing to the hit is not OK.
  • bit 2: hit at the border of the pad plane.
  • bit 3 - 19: not used for the time being.
  • bit 20 - 30: reserved for private usage.
  • bit 31: not used for the time being


Existing reconstruction code can sometimes be more specific than that. What comes to my mind is:
  • contains a dead pad
  • contains an overflow pulse
  • contains a pulse that has been split
  • contains a pulse with strange shape
  • is at the edge/border


Did I forget something? I would propose that the most usual defects get a bit assigned and only the least part is undefined.


Cheers,
Christoph


When you have eliminated the impossible, whatever remains, however improbable, must be the truth. (Sir A.C. Doyle in Sign of Four)
 
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