TrackingTools/MaterialEffects/interface/CombinedMaterialEffectsUpdator.h - master - githubmirror/cmssw

TrackingTools/MaterialEffects/interface/CombinedMaterialEffectsUpdator.h

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31 май 2019, 13:16

31 май 2019, 13:1614da925

#ifndef _CR_COMBINEDMATERIALEFFECTSUPDATOR_H_
#define _CR_COMBINEDMATERIALEFFECTSUPDATOR_H_

/** \class CombinedMaterialEffectsUpdator
 *  Combines EnergyLossUpdator and MultipleScatteringUpdator.
 *  Adds effects from multiple scattering (via MultipleScatteringUpdator)
 *  and energy loss (via EnergyLossUpdator).
 *  Ported from ORCA.
 *
 *  \author todorov, cerati
 */

#include "TrackingTools/MaterialEffects/interface/MultipleScatteringUpdator.h"
#include "TrackingTools/MaterialEffects/interface/EnergyLossUpdator.h"
#include "TrackingTools/MaterialEffects/interface/MaterialEffectsUpdator.h"
#include "FWCore/Utilities/interface/Visibility.h"

class CombinedMaterialEffectsUpdator final : public MaterialEffectsUpdator {
public:
  CombinedMaterialEffectsUpdator* clone() const override { return new CombinedMaterialEffectsUpdator(*this); }

public:
  /// Specify assumed mass of particle for material effects.
  /// If ptMin > 0, then the rms muliple scattering angle will be calculated taking into account the uncertainty
  /// in the reconstructed track momentum. (By default, it is neglected). However, a lower limit on the possible
  /// value of the track Pt will be applied at ptMin, to avoid the rms multiple scattering becoming too big.
  CombinedMaterialEffectsUpdator(float mass, float ptMin = -1.)
      : MaterialEffectsUpdator(mass), theMSUpdator(mass, ptMin), theELUpdator(mass) {}

  // here comes the actual computation of the values
  void compute(const TrajectoryStateOnSurface&, const PropagationDirection, Effect& effect) const override;

private:
  // objects used for calculations of multiple scattering and energy loss
  MultipleScatteringUpdator theMSUpdator;
  EnergyLossUpdator theELUpdator;
};

#endif