FourHitFilters.cc

/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2010 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributors: Jakob Lettenbichler                                      *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
 
#include "tracking/vxdCaTracking/FourHitFilters.h"
#include <math.h>
 
using namespace std;
using namespace Belle2;
 
 
 
double FourHitFilters::calcDeltapT()
{
  if (m_circleCalculated == false) { calcCircle(); }
  return fabs(m_threeHitFilter.calcPt(m_radiusABC -
                                      m_radiusBCD)); // , or, pT[GeV/c] = 0.299710*B[T]*r[m] = 0,449565*r[cm]/100 = 0.00449565*r[cm]
}
 
 
 
double FourHitFilters::calcDeltaDistCircleCenter()   // instead of comparing both distance2IP-values, the real circleCenters will be compared
{
  if (m_circleCalculated == false) { calcCircle(); }
  return (fabs(m_centerABC.Perp() - m_centerBCD.Perp())); // distance between both guesses of the intersection point
} // return unit: cm