#include <decaytype.h>

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

Definition at line 94 of file decaytype.h.

Inheritance 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 ([[maybe_unused]] 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

virtual bool	is_dilepton_decay () const

Protected Member Functions
virtual double	rho ([[maybe_unused]] 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 51 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 60 of file decaytype.cc.

60 { return 2; }

◆ 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 62 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]);
 }

◆ threshold()

double smash::TwoBodyDecay::threshold ( ) const

inline

Returns: The kinematic energy threshold of the decay in GeV.

Definition at line 107 of file decaytype.h.

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

◆ rho()

virtual double smash::TwoBodyDecay::rho ( [[maybe_unused] ] 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.

Definition at line 122 of file decaytype.h.

122 { return 1.; }

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

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

Public Member Functions

Protected Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

◆ TwoBodyDecay()

Member Function Documentation

◆ particle_number()

◆ has_particles()

◆ threshold()

◆ rho()