InvariantMassMuMuIntegrator.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
 
 
namespace Belle2::InvariantMassMuMuCalib {
 
 
  class InvariantMassMuMuIntegrator {
 
  public:
 
    void init(double Mean,
              double Sigma,
              double SigmaK,
              double BMean,
              double BDelta,
              double Tau,
              double SigmaE,
              double Frac,
              double M0,
              double Eps,
              double CC,
              double Slope,
              double X);
 
    double eval(double t);
 
    double integralTrap(double a, double b);
 
    double integralTrapImp(double Eps, double a);
 
    double integralKronrod(double a);
 
  private:
 
    double m_mean = 4;    
    double m_sigma  = 30; 
    double m_sigmaK = 30; 
    double m_bMean = 0;    
    double m_bDelta = 2.6; 
    double m_tauL = 60;    
    double m_tauR = 60;    
 
    double m_sigmaE = 30;  
    double m_frac = 0.1;   
 
    double m_m0   = 10500; 
    double m_eps  = 0.01;  
    double m_slope = 0.95; 
 
    double m_x    = 10400; 
 
    double m_C = 16;       
 
  };
 
}