Difference between revisions of "Particle ID"
From GlueXWiki
| Line 8: | Line 8: | ||
** The measured start counter hit time, if present, propagated to <span style="color:#008000">position</span>(). | ** The measured start counter hit time, if present, propagated to <span style="color:#008000">position</span>(). | ||
** If neither is available, it's value is <span style="color:red">NaN</span> (and the detector system is <span style="color:red">SYS_NULL</span>). | ** If neither is available, it's value is <span style="color:red">NaN</span> (and the detector system is <span style="color:red">SYS_NULL</span>). | ||
| + | * <span style="color:#0000FF">DChargedTrackHypothesis</span>::<span style="color:#008000">measuredBeta</span>() is <span style="color:#008000">pathLength</span>()/<span style="color:red">c</span>*(<span style="color:#008000">t1</span>() - <span style="color:#008000">t0</span>()) | ||
== Neutral Showers == | == Neutral Showers == | ||
Revision as of 11:32, 13 February 2015
Charged Tracks
- DChargedTrackHypothesis::position() returns the position of the track at its position of closest approach to the beamline.
- DChargedTrackHypothesis::t1() is the measured hit time of the BCAL/TOF/FCAL hit/shower, if present, that is matched to the track (if hits in multiple systems, order of preference is BCAL/TOF/FCAL).
- If it is not matched to a hit, it's value is NaN (and the detector system is SYS_NULL).
- DChargedTrackHypothesis::pathLength() returns the path length along the track from it's hit in the BCAL/TOF/FCAL to position().
- DChargedTrackHypothesis::t0() is either:
- The selected RF bunch time, if present, propagated to position().
- The measured start counter hit time, if present, propagated to position().
- If neither is available, it's value is NaN (and the detector system is SYS_NULL).
- DChargedTrackHypothesis::measuredBeta() is pathLength()/c*(t1() - t0())
