ISF::GenParticleLifetimeFilter Class Reference

#include <GenParticleLifetimeFilter.h>

Inheritance diagram for ISF::GenParticleLifetimeFilter:

Collaboration diagram for ISF::GenParticleLifetimeFilter:

Public Member Functions
	GenParticleLifetimeFilter (const std::string &t, const std::string &n, const IInterface *p)
	Constructor. More...
	~GenParticleLifetimeFilter ()
	Destructor. More...
bool	pass (const HepMC::GenParticle &particle) const
	does the given particle pass the filter? More...

Private Attributes
double	m_minLifetime {0.000001}

Detailed Description

Filter out particles with lifetimes shorter than a minimum value

Definition at line 27 of file GenParticleLifetimeFilter.h.

Constructor & Destructor Documentation

GenParticleLifetimeFilter()

ISF::GenParticleLifetimeFilter::GenParticleLifetimeFilter	(	const std::string &	t,
		const std::string &	n,
		const IInterface *	p
	)

Constructor.

Definition at line 20 of file GenParticleLifetimeFilter.cxx.

  : base_class(t,n,p)
{
    declareProperty("MinimumLifetime", m_minLifetime, "");
}

~GenParticleLifetimeFilter()

ISF::GenParticleLifetimeFilter::~GenParticleLifetimeFilter ( )

inline

Destructor.

Definition at line 34 of file GenParticleLifetimeFilter.h.

{}

Member Function Documentation

pass()

bool ISF::GenParticleLifetimeFilter::pass

(

const HepMC::GenParticle &

particle

)

const

does the given particle pass the filter?

Definition at line 35 of file GenParticleLifetimeFilter.cxx.

                                                                              {
  // the GenParticle end vertex
  auto endVtx = particle.end_vertex();
#endif
  // no end vertex?
  if (!endVtx) {
    ATH_MSG_DEBUG("GenParticle does not have an end vertex, this is fine");
    return true;
  }
  // (x,y,z) end position
  const auto& end4Vec = endVtx->position();
 
  // the GenParticle production vertex
#ifdef HEPMC3
  auto  prodVtx = particle->production_vertex();
#else
  auto  prodVtx = particle.production_vertex();
#endif
  // no production vertex?
  if (!prodVtx) {
    ATH_MSG_DEBUG("GenParticle does not have a production vertex, filtering it out");
    return false;
  }
  // (x,y,z) production position
  const auto& prod4Vec = prodVtx->position();
  const CLHEP::HepLorentzVector lv0 ( prod4Vec.x(), prod4Vec.y(), prod4Vec.z(), prod4Vec.t() );
  const CLHEP::HepLorentzVector lv1 ( end4Vec.x(), end4Vec.y(), end4Vec.z(), end4Vec.t() );
  return ((lv1-lv0).mag()>m_minLifetime);
}

Member Data Documentation

m_minLifetime

double ISF::GenParticleLifetimeFilter::m_minLifetime {0.000001}

private

Definition at line 44 of file GenParticleLifetimeFilter.h.

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

• GenParticleLifetimeFilter.h
• GenParticleLifetimeFilter.cxx