FeedthroughParticle.h

/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2020 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributor: Francesco Tenchini, Jo-Frederik Krohn, Fabian Krinner     *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
#pragma once
 
#include <analysis/VertexFitting/TreeFitter/ParticleBase.h>
 
namespace TreeFitter {
  class FeedthroughParticle : public ParticleBase {
 
  public:
 
    FeedthroughParticle(Belle2::Particle*   particle,
                        const ParticleBase* mother,
                        const ConstraintConfiguration& config,
                        bool  forceFitAll
                       );
 
    ~FeedthroughParticle() {};
 
    virtual ErrCode initMotherlessParticle(FitParams&) override;
 
    virtual ErrCode initParticleWithMother(FitParams&) override {return ErrCode(ErrCode::Status::success);}
 
    virtual ErrCode initCovariance(FitParams&) const override;
 
    virtual int dim() const override {return 0;} // This does not have any parameters
 
    virtual void addToConstraintList(constraintlist& alist, int depth) const override;
 
    int type() const override {return kFeedthroughParticle;}
 
    int posIndex() const override;
 
    int momIndex() const override;
 
  };
 
}