TOPModuleT0DeltaTAlgorithm.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 <calibration/CalibrationAlgorithm.h>
#include <TH1F.h>
 
namespace Belle2 {
  namespace TOP {

    class TOPModuleT0DeltaTAlgorithm : public CalibrationAlgorithm {
    public:

      TOPModuleT0DeltaTAlgorithm();

      void setMinEntries(int minEntries) {m_minEntries = minEntries;}

      void setFitInitializers(double sigmaCore, double sigmaTail, double tailFract)
      {
        m_sigmaCoreInit = sigmaCore;
        m_sigmaTailInit = sigmaTail;
        m_tailFractInit = tailFract;
      }

      void setCutoffEntries(int cutoffEntries) {m_cutoffEntries = cutoffEntries;}

      void setMinError(double minError) {m_minError = minError;}
 
    private:

      virtual EResult calibrate() final;

      int fitSingleGaus(std::shared_ptr<TH1F> h);

      int fitDoubleGaus(std::shared_ptr<TH1F> h);

      int fitHistogram(std::shared_ptr<TH1F> h);
 
      // algorithm parameters
      int m_minEntries = 10; 
      double m_sigmaCoreInit = 0.120; 
      double m_sigmaTailInit = 0.240; 
      double m_tailFractInit = 0.20; 
      int m_cutoffEntries = 100; 
      double m_minError = 0.100; 
 
      // temporary store for results of a single fit
      double m_delT0 = 0; 
      double m_error = 0; 
      double m_chi2 = 0;  
      double m_ndf = 0;  
 
    };
 
  } // end namespace TOP
} // end namespace Belle2