CDCDedxSigmaPred.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
#include <framework/database/DBObjPtr.h>
 
#include <reconstruction/dbobjects/CDCDedxMeanPars.h>
#include <reconstruction/dbobjects/CDCDedxSigmaPars.h>
 
#include <vector>
 
#include <memory>
#include <cmath>
 
namespace Belle2 {
  class CDCDedxSigmaPred {
 
  public:
 
    std::vector<double> getSigmaVector() const
    {
 
      // make sure the resolution parameters are reasonable
      if (!m_DBSigmaPars || m_DBSigmaPars->getSize() == 0) {
        B2WARNING("No dE/dx sigma parameters!");
        std::vector<double> sigmapar;
        for (int i = 0; i < 12; ++i)
          sigmapar.push_back(1.0);
        return sigmapar;
      } else return m_DBSigmaPars->getSigmaPars();
    }
 
    double sigmaCurve(double* x, const double* par, int version) const;
 
    double getSigma(double dedx, double nhit, double cos, double timereso);
 
    double nhitPrediction(double nhit);
 
    double ionzPrediction(double dedx);
 
    double cosPrediction(double cos);
 
  private:
 
    std::vector<double> m_sigmapars; 
    const DBObjPtr<CDCDedxSigmaPars> m_DBSigmaPars; 
  };
} // Belle2 namespace