smash::TwoBodyDecay Class Reference

#include <decaytype.h>

TwoBodyDecay represents a decay type with two final-state particles.

Definition at line 92 of file decaytype.h.

Inheritance diagram for smash::TwoBodyDecay:

Collaboration diagram for smash::TwoBodyDecay:

Public Member Functions
	TwoBodyDecay (ParticleTypePtrList part_types, int l)
	Construct a TwoBodyDecay. More...
unsigned int	particle_number () const override
bool	has_particles (ParticleTypePtrList list) const override
double	threshold () const
Public Member Functions inherited from smash::DecayType
	DecayType (ParticleTypePtrList part_types, int l)
	Construct a DecayType. More...
virtual	~DecayType ()=default
	Virtual Destructor. More...
virtual bool	has_mother (ParticleTypePtr mother) const
const ParticleTypePtrList &	particle_types () const
int	angular_momentum () const
virtual double	width (double m0, double G0, double m) const =0
virtual double	in_width (double m0, double G0, double m, double m1, double m2) const =0

Protected Member Functions
virtual double	rho (double mass) const
	This is a virtual helper method which is used to write the width as Gamma(m) = Gamma_0 * rho(m) / rho(m_0). More...

Additional Inherited Members
Protected Attributes inherited from smash::DecayType
ParticleTypePtrList	particle_types_
	final-state particles of the decay More...
int	L_
	angular momentum of the decay More...

Constructor & Destructor Documentation

TwoBodyDecay()

smash::TwoBodyDecay::TwoBodyDecay	(	ParticleTypePtrList	part_types,
		int	l
	)

Construct a TwoBodyDecay.

Parameters

[in]	part_types	Final-state particles of the decay.
[in]	l	Angular momentum of the decay.

Returns

The constructed object.

Definition at line 52 of file decaytype.cc.

    : DecayType(part_types, l) {
  if (part_types.size() != 2) {
    throw std::runtime_error(
        "Wrong number of particles in TwoBodyDecay constructor: " +
        std::to_string(part_types.size()));
  }
}

Member Function Documentation

particle_number()

unsigned int smash::TwoBodyDecay::particle_number ( ) const

overridevirtual

Returns

the number of particles in the final state

Implements smash::DecayType.

Definition at line 61 of file decaytype.cc.

{ return 2; }

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has_particles()

bool smash::TwoBodyDecay::has_particles ( ParticleTypePtrList  list ) const

overridevirtual

Returns

if the final state consists of the given particle list.

Parameters

[in]

list

Final state particle types to be checked.

Implements smash::DecayType.

Definition at line 63 of file decaytype.cc.

                                                               {
  if (list.size() != particle_number()) {
    return false;
  }
  return (particle_types_[0] == list[0] && particle_types_[1] == list[1]) ||
         (particle_types_[0] == list[1] && particle_types_[1] == list[0]);
}

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threshold()

double smash::TwoBodyDecay::threshold ( ) const

inline

Returns

The kinematic energy threshold of the decay in GeV.

Definition at line 105 of file decaytype.h.

                           {
    return particle_types_[0]->min_mass_spectral() +
           particle_types_[1]->min_mass_spectral();
  }

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rho()

virtual double smash::TwoBodyDecay::rho ( double  mass ) const

inlineprotectedvirtual

This is a virtual helper method which is used to write the width as Gamma(m) = Gamma_0 * rho(m) / rho(m_0).

This ensures that the width is properly normalized at the pole mass to Gamma(m_0) = Gamma_0. By default rho simply equals one, which corresponds to a constant width.

Parameters

[in]

mass

Resonance mass of the decay.

Returns

Width of the decay at the given mass.

Reimplemented in smash::TwoBodyDecayStable, smash::TwoBodyDecaySemistable, and smash::TwoBodyDecayUnstable.

Definition at line 120 of file decaytype.h.

                                        {
    SMASH_UNUSED(mass);
    return 1.;
  }

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

• src/include/smash/decaytype.h
• src/decaytype.cc