JPHYSICS::JGeane_t Class Reference

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

#include <JGeane.hh>

Inheritance diagram for JPHYSICS::JGeane_t:

Public Member Functions
	JGeane_t (const double __a, const double __b)
	constructor
virtual double	getA () const override
	Get energy loss constant.
virtual double	getB () const override
	Get energy loss constant.
virtual double	getE (const double E, const double dx) const override
	Get energy of muon after specified distance.
virtual double	getX (const double E0, const double E1) const override
	Get distance traveled by muon.
double	operator() (const double E, const double dx) const
	Energy of muon after specified distance.
double	operator() (const double E) const
	Range of muon.
double	operator() () const
	Equivalent unit track length per unit shower energy and per unit track length.

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:

\f[ -\frac{dE}{dx}  =  a + bE \f]

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

Definition at line 124 of file JGeane.hh.

Constructor & Destructor Documentation

JGeane_t()

JPHYSICS::JGeane_t::JGeane_t ( 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 bremsstrahlung [m^-1]

Definition at line 133 of file JGeane.hh.

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

Member Function Documentation

getA()

virtual double JPHYSICS::JGeane_t::getA ( ) const

inlineoverridevirtual

Get energy loss constant.

Returns

Energy loss due to ionisation [GeV/m]

Implements JPHYSICS::JGeane.

Definition at line 145 of file JGeane.hh.

    {
      return a;
    }

getB()

virtual double JPHYSICS::JGeane_t::getB ( ) const

inlineoverridevirtual

Get energy loss constant.

Returns

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

Implements JPHYSICS::JGeane.

Definition at line 156 of file JGeane.hh.

    {
      return b;
    }

getE()

virtual double JPHYSICS::JGeane_t::getE ( const double E, const double dx ) const

inlineoverridevirtual

Get energy of muon after specified distance.

Parameters

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

Returns

Energy of muon [GeV]

Implements JPHYSICS::JGeane.

Definition at line 169 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;
    }

getX()

virtual double JPHYSICS::JGeane_t::getX ( const double E0, const double E1 ) const

inlineoverridevirtual

Get distance traveled by muon.

Parameters

E0	Energy of muon at start [GeV]
E1	Energy of muon at end [GeV]

Returns

distance traveled [m]

Implements JPHYSICS::JGeane.

Definition at line 187 of file JGeane.hh.

    {
      return -log((a + b*E1) / (a+b*E0)) / b;
    }

operator()() [1/3]

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

inlineinherited

Energy of muon after specified distance.

Parameters

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

Returns

Energy of muon [GeV]

Definition at line 85 of file JGeane.hh.

    {
      return this->getE(E, dx);
    }

operator()() [2/3]

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

inlineinherited

Range of muon.

Parameters

E	Energy of muon [GeV]

Returns

range [m]

Definition at line 97 of file JGeane.hh.

    {
      return this->getX(E, 0.0);
    }

operator()() [3/3]

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

inlineinherited

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

Returns

equivalent unit track length [Gev^-1]

Definition at line 108 of file JGeane.hh.

    {
      return this->getB() * geanc();
    }

Member Data Documentation

a

const double JPHYSICS::JGeane_t::a

protected

Definition at line 194 of file JGeane.hh.

b

const double JPHYSICS::JGeane_t::b

protected

Definition at line 195 of file JGeane.hh.

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

• JGeane.hh