(r1) HitTripletsIntroduction < CMS

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---+++!!Low p<sub>T</sub> tracking

For global reconstruction the defaults are

<verbatim>
GlobalTrackingRegion ( float ptMin = 1., float originRadius = 0.2,
                       float originHalfLength = 15., float originZPos = 0.,
                       bool precise = false );
</verbatim>

Generation of hit triplets is in =ORCA/src/TrackerReco/TkHitTriplets/src= %BR%
[[http://cmsdoc.cern.ch/swdev/lxr/ORCA/source/ORCA/src/TrackerReco/TkHitTriplets/src/HitTripletGeneratorFromPairAndLayers.cc?v=snapshot][HitTripletGeneratorFromPairAndLayers.cc ]] %BR%
[[http://cmsdoc.cern.ch/swdev/lxr/ORCA/source/ORCA/src/TrackerReco/TkHitTriplets/src/HitTripletGeneratorFromPairAndLayers.h?v=snapshot][HitTripletGeneratorFromPairAndLayers.h]]

Sensitive parameters for the extrapolation of the third hit are %BR%
=float dphi = 0.03;= %BR%
=if (fabs(dist) > 0.025) continue;=

-- Main.FerencSikler - 14 Mar 2006

Topic revision: r1 - 2006-03-14 - FerencSikler

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