BkgNeutronWeight.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 <vector>
 
namespace Belle2 {

  class BkgNeutronWeight {
 
  public:

    static BkgNeutronWeight& getInstance();

    double getWeight(double ke);
 
  private:

    BkgNeutronWeight(void);

    void addPoint(double, double);

    void doSpline();

    int m_n;

    std::vector<double> m_x;

    std::vector<double> m_y;

    std::vector<double> m_b;

    std::vector<double> m_c;

    std::vector<double> m_d;

    static BkgNeutronWeight* m_Instance;
 
  };

} // end of namespace Belle2