Class to hold the beta-gamma (bg) resolution function. More...

#include <CDCDedxWidgetSigma.h>

Public Member Functions
	CDCDedxWidgetSigma ()
	Constructor.

virtual	~CDCDedxWidgetSigma ()
	Destructor.

double	sigmaCurve (double *x, const std::vector< double > &par) const
	calculate the predicted sigma value as a function of beta-gamma (bg) this is done with a different function depending dE/dx, nhit, and cos(theta)

Detailed Description

Class to hold the beta-gamma (bg) resolution function.

Definition at line 22 of file CDCDedxWidgetSigma.h.

Constructor & Destructor Documentation

◆ CDCDedxWidgetSigma()

CDCDedxWidgetSigma ( )

inline

Constructor.

Definition at line 29 of file CDCDedxWidgetSigma.h.

29{};

◆ ~CDCDedxWidgetSigma()

virtual ~CDCDedxWidgetSigma ( )

inlinevirtual

Destructor.

Definition at line 34 of file CDCDedxWidgetSigma.h.

34{};

Member Function Documentation

◆ sigmaCurve()

double sigmaCurve	(	double *	x,
		const std::vector< double > &	par
	)		const

inline

calculate the predicted sigma value as a function of beta-gamma (bg) this is done with a different function depending dE/dx, nhit, and cos(theta)

Definition at line 40 of file CDCDedxWidgetSigma.h.

    {
 
      double f = 0;
 
      if (par[0] == 1) { // return dedx parameterization
        if (par.size() == 3)
          f = par[1] + par[2] * x[0];
      }
 
      else if (par[0] == 2) { // return nhit or sin(theta) parameterization
        if (par.size() == 6)
          f = par[1] * std::pow(x[0], 4) + par[2] * std::pow(x[0], 3) +
              par[3] * x[0] * x[0] + par[4] * x[0] + par[5];
      }
 
      else if (par[0] == 3) { // return cos(theta) parameterization
        if (par.size() == 11)
          f = par[1] * exp(-0.5 * pow(((x[0] - par[2]) / par[3]), 2)) +
              par[4] * pow(x[0], 6) + par[5] * pow(x[0], 5) + par[6] * pow(x[0], 4) +
              par[7] * pow(x[0], 3) + par[8] * x[0] * x[0] + par[9] * x[0] + par[10];
      }
 
      return f;
    }

The documentation for this class was generated from the following file: