class HParticlePathLengthCorr: public HReconstructor

_HADES_CLASS_DESCRIPTION

*-- AUTHOR : G. Kornakov

 HParticlePathLengthCorr

 Reconstructor to recalulate the path length for the event vertex.
 Beta and Mass of the particle are recalutated. HParticlePathLengthCorr
 can be run by  HParticleT0Reco automatically if enabled.

  setBeamTime() has to be set for the correct data set (default "apr12")


 USAGE:

  HParticlePathLengthCorr pathCorr;
  pathCorr.setBeamTime("apr12");

  // 2 possible ways :
  a. As Reconstructor add it to standard task list
  b. With HLoop :

     before eventLoop :  pathCorr.init();
     inside eventloop :  pathCorr.execute();