JPHYSICS::JGeane Class Reference

Function object for the Energy loss of the muon. More...

#include <JGeane.hh>

Public Member Functions
	JGeane (const double __a, const double __b)
	constructor More...
double	getA () const
	Get energy loss constant. More...
double	getB () const
	Get energy loss constant. More...
double	getE (const double E, const double dx) const
	Get energy of muon after specified distance. More...
double	getDE (const double dx) const
	Get derivative of energy of muon after specified distance. More...
double	operator() (const double E, const double dx) const
	Energy of muon after specified distance. More...
double	operator() (const double E) const
	Range of muon. More...
double	operator() () const
	Equivalent unit track length per unit shower energy and per unit track length. More...

Protected Attributes
const double	a
const double	b

Detailed Description

Function object for the Energy loss of the muon.

The energy loss can be formulated as:

N.B: and are assumed constant (internal units m and GeV, respectively).

Definition at line 38 of file JGeane.hh.

Constructor & Destructor Documentation

JPHYSICS::JGeane::JGeane ( const double  __a, const double  __b  )

inline

constructor

Parameters

__a	Energy loss due to ionisation [GeV/m]
__b	Energy loss due to pair production and Bremstrahlung [m^-1]

Definition at line 45 of file JGeane.hh.

                             :
      a(__a),
      b(__b)
    {}

Member Function Documentation

double JPHYSICS::JGeane::getA ( ) const

inline

Get energy loss constant.

Returns

Energy loss due to ionisation [GeV/m]

Definition at line 57 of file JGeane.hh.

    {
      return a;
    }

double JPHYSICS::JGeane::getB ( ) const

inline

Get energy loss constant.

Returns

Energy loss due to pair production and Bremstrahlung [m^-1]

Definition at line 68 of file JGeane.hh.

    {
      return b;
    }

double JPHYSICS::JGeane::getE ( const double  E, const double  dx  ) const

inline

Get energy of muon after specified distance.

Parameters

E	Energy of muon [GeV]
dx	distance traveled [m]

Returns

Energy of muon [GeV]

Definition at line 81 of file JGeane.hh.

    {
      const double y = (a/b + E) * exp(-b*dx)  -  a/b;

      if (y > 0.0)
        return y;
      else
        return 0.0;
    }

double JPHYSICS::JGeane::getDE ( const double  dx ) const

inline

Get derivative of energy of muon after specified distance.

Parameters

dx	distance traveled [m]

Returns

derivative of energy of muon

Definition at line 98 of file JGeane.hh.

    {
      return exp(-b*dx);
    }

double JPHYSICS::JGeane::operator() ( const double  E, const double  dx  ) const

inline

Energy of muon after specified distance.

Parameters

E	Energy of muon [GeV]
dx	distance traveled [m]

Returns

Energy of muon [GeV]

Definition at line 111 of file JGeane.hh.

    {
      return getE(E, dx);
    }

double JPHYSICS::JGeane::operator() ( const double  E ) const

inline

Range of muon.

Parameters

E	Energy of muon [GeV]

Returns

range [m]

Definition at line 123 of file JGeane.hh.

    {
      const double x = b*E/a;

      if (x > -1.0)
        return (1/b) * log(1.0 + x);
      else
        return 0.0;
    }

double JPHYSICS::JGeane::operator() ( ) const

inline

Equivalent unit track length per unit shower energy and per unit track length.

Returns

equivalent unit track length [Gev^-1]

Definition at line 139 of file JGeane.hh.

    {
      return b * geanc();
    }

Member Data Documentation

const double JPHYSICS::JGeane::a

protected

Definition at line 145 of file JGeane.hh.

const double JPHYSICS::JGeane::b

protected

Definition at line 146 of file JGeane.hh.

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

• JGeane.hh