Difference between revisions of "Update on track finding in FDC"

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The segment-based track-finding algorithm has been refined:
 
The segment-based track-finding algorithm has been refined:
 
* I no longer rely on the refitting to determine the charge of the particle unless the individual segment information is ambiguous for those segments linked into candidates.
 
* I no longer rely on the refitting to determine the charge of the particle unless the individual segment information is ambiguous for those segments linked into candidates.
 +
* The dip angle and vertex position are determined from either the most upstream segment or the result of the refit depending on which gives a vertex position closest to the center of the target.
 
* The track-matching cut from segment to segment is now momentum-dependent: <math>\delta r < 2.79+ 2.88/p^2</math>.
 
* The track-matching cut from segment to segment is now momentum-dependent: <math>\delta r < 2.79+ 2.88/p^2</math>.
 
[[Image:segment_matching_cut.gif]]
 
[[Image:segment_matching_cut.gif]]

Revision as of 08:33, 29 February 2008

The segment-based track-finding algorithm has been refined:

  • I no longer rely on the refitting to determine the charge of the particle unless the individual segment information is ambiguous for those segments linked into candidates.
  • The dip angle and vertex position are determined from either the most upstream segment or the result of the refit depending on which gives a vertex position closest to the center of the target.
  • The track-matching cut from segment to segment is now momentum-dependent: \delta r<2.79+2.88/p^{2}.

Segment matching cut.gif