Representation of particles from a HepMC::GenEvent. More...

#include <Particle.hh>

Inheritance diagram for Particle:

Collaboration diagram for Particle:

Public Member Functions
	Particle ()
	Particle (PdgId pid, const FourMomentum &mom)
	Constructor without GenParticle.
	Particle (const GenParticle &gp)
	Constructor from a HepMC GenParticle.
	Particle (const GenParticle *gp)
	Constructor from a HepMC GenParticle pointer.
Basic particle specific properties
const GenParticle *	genParticle () const
	Get a const reference to the original GenParticle.
	operator const GenParticle * () const
	Cast operator for conversion to GenParticle*.
const FourMomentum &	momentum () const
	The momentum.
Particle &	setMomentum (const FourMomentum &momentum)
	Set the momentum.
Particle ID code accessors
PdgId	pid () const
	This Particle's PDG ID code.
PdgId	abspid () const
	Absolute value of the PDG ID code.
PdgId	pdgId () const
Particle species properties
double	charge () const
	The charge of this Particle.
int	threeCharge () const
	Three times the charge of this Particle (i.e. integer multiple of smallest quark charge).
bool	isHadron () const
	Is this a hadron?
bool	isMeson () const
	Is this a meson?
bool	isBaryon () const
	Is this a baryon?
bool	isLepton () const
	Is this a lepton?
bool	isNeutrino () const
	Is this a neutrino?
bool	hasBottom () const
	Does this (hadron) contain a b quark?
bool	hasCharm () const
	Does this (hadron) contain a c quark?
Ancestry properties
bool	hasAncestor (PdgId pdg_id) const
bool	fromDecay () const
	Determine whether the particle is from a hadron or tau decay.
bool	fromBottom () const
	Determine whether the particle is from a b-hadron decay.
bool	fromCharm () const
	Determine whether the particle is from a c-hadron decay.
bool	fromTau () const
	Determine whether the particle is from a tau decay.
Decay info
bool	isStable () const
	Whether this particle is stable according to the generator.
vector< Particle >	children () const
	Get a list of the direct descendants from the current particle.
vector< Particle >	allDescendants () const
vector< Particle >	stableDescendants () const
double	flightLength () const
	Flight length (divide by mm or cm to get the appropriate units)
Effective momentum accessors
	operator const FourMomentum & () const
	Cast operator for conversion to FourMomentum.
Convenience access to the effective 4-vector properties
Todo: Add a converter and cast operator to FJ3 PseudoJet
double	E () const
	Get the energy directly.
double	energy () const
	Get the energy directly (alias).
double	pt () const
	Get the directly.
double	pT () const
	Get the directly (alias).
double	perp () const
	Get the directly (alias).
double	Et () const
	Get the directly.
double	mass () const
	Get the mass directly.
double	mass2 () const
	Get the mass**2 directly.
double	pseudorapidity () const
	Get the $\eta$ directly.
double	eta () const
	Get the $\eta$ directly (alias).
double	abspseudorapidity () const
	Get the $\|\eta\|$ directly.
double	abseta () const
	Get the $\|\eta\|$ directly (alias).
double	rapidity () const
	Get the directly.
double	rap () const
	Get the directly (alias).
double	absrapidity () const
	Get the directly.
double	absrap () const
	Get the directly (alias).
double	phi () const
	Get the $\phi$ directly.
Private Attributes
const GenParticle *	_original
	A pointer to the original GenParticle from which this Particle is projected.
PdgId	_id
	The PDG ID code for this Particle.
FourMomentum	_momentum
	The momentum of this projection of the Particle.

Detailed Description

Representation of particles from a HepMC::GenEvent.

Definition at line 13 of file Particle.hh.

Constructor & Destructor Documentation

Particle ( ) [inline]

Default constructor.

Deprecated:: A particle without info is useless. This only exists to keep STL containers happy.

Definition at line 18 of file Particle.hh.

Referenced by Particle::allDescendants(), Particle::children(), and Particle::stableDescendants().

      : ParticleBase(),
        _original(0), _id(0), _momentum()
    { }

Particle	(	PdgId	pid,
		const FourMomentum &	mom
	)		`[inline]`

Constructor without GenParticle.

Definition at line 24 of file Particle.hh.

      : ParticleBase(),
        _original(0), _id(pid), _momentum(mom)
    { }

Particle ( const GenParticle & gp ) [inline]

Constructor from a HepMC GenParticle.

Definition at line 30 of file Particle.hh.

      : ParticleBase(),
        _original(&gp), _id(gp.pdg_id()),
        _momentum(gp.momentum())
    { }

Particle ( const GenParticle * gp ) [inline]

Constructor from a HepMC GenParticle pointer.

Definition at line 37 of file Particle.hh.

      : ParticleBase(),
        _original(gp), _id(gp->pdg_id()),
        _momentum(gp->momentum())
    { }

Member Function Documentation

double abseta ( ) const [inline, inherited]

Get the $|\eta|$ directly (alias).

Definition at line 68 of file ParticleBase.hh.

References FourVector::abseta(), and ParticleBase::momentum().

Referenced by CMS_2013_I1273574::analyze(), ATLAS_2012_I1199269::analyze(), ATLAS_2012_I1204447::analyze(), and ATLAS_2011_S9225137::analyze().

{ return momentum().abseta(); }

PdgId abspid ( ) const [inline]

Absolute value of the PDG ID code.

Definition at line 76 of file Particle.hh.

References Particle::_id.

Referenced by LHCB_2013_I1218996::analyze(), ATLAS_2012_I1204447::analyze(), and ATLAS_2012_I1204447::get_tau_neutrino_mom().

{ return _id; }

double abspseudorapidity ( ) const [inline, inherited]

Get the $|\eta|$ directly.

Definition at line 66 of file ParticleBase.hh.

References FourVector::abspseudorapidity(), and ParticleBase::momentum().

{ return momentum().abspseudorapidity(); }

double absrap ( ) const [inline, inherited]

Get the $ |y| $ directly (alias).

Definition at line 77 of file ParticleBase.hh.

References FourMomentum::absrap(), and ParticleBase::momentum().

Referenced by ATLAS_2011_I930220::analyze(), CMS_2013_I1272853::analyze(), and LHCB_2013_I1218996::analyze().

{ return momentum().absrap(); }

double absrapidity ( ) const [inline, inherited]

Get the $ |y| $ directly.

Definition at line 75 of file ParticleBase.hh.

References FourMomentum::absrapidity(), and ParticleBase::momentum().

{ return momentum().absrapidity(); }

vector<Particle> allDescendants ( ) const [inline]

Get a list of all the descendants (including duplication of parents and children) from the current particle

Todo:

Use recursion through replica-avoiding MCUtils functions to avoid bookkeeping duplicates

Insist that the current particle is post-hadronization, otherwise throw an exception?

Todo:: Remove this const mess crap when HepMC doesn't suck

Todo:: Would like to do this, but the range objects are broken

Definition at line 206 of file Particle.hh.

References Particle::genParticle(), Particle::isStable(), and Particle::Particle().

                                            {
      vector<Particle> rtn;
      if (isStable()) return rtn;
      /// @todo Remove this const mess crap when HepMC doesn't suck
      HepMC::GenVertex* gv = const_cast<HepMC::GenVertex*>( genParticle()->end_vertex() );
      /// @todo Would like to do this, but the range objects are broken
      // foreach (const GenParticle* gp, gv->particles(HepMC::descendants))
      //   rtn += Particle(gp);
      for (GenVertex::particle_iterator it = gv->particles_begin(HepMC::descendants); it != gv->particles_end(HepMC::descendants); ++it)
        rtn += Particle(*it);
      return rtn;
    }

double charge ( ) const [inline]

The charge of this Particle.

Definition at line 89 of file Particle.hh.

References Particle::pdgId().

Referenced by NeutralFinalState::project().

                          {
      return PID::charge(pdgId());
    }

vector<Particle> children ( ) const [inline]

Get a list of the direct descendants from the current particle.

Todo:: Remove this const mess crap when HepMC doesn't suck

Todo:: Would like to do this, but the range objects are broken

Definition at line 190 of file Particle.hh.

References Particle::genParticle(), Particle::isStable(), and Particle::Particle().

                                      {
      vector<Particle> rtn;
      if (isStable()) return rtn;
      /// @todo Remove this const mess crap when HepMC doesn't suck
      HepMC::GenVertex* gv = const_cast<HepMC::GenVertex*>( genParticle()->end_vertex() );
      /// @todo Would like to do this, but the range objects are broken
      // foreach (const GenParticle* gp, gv->particles(HepMC::children))
      //   rtn += Particle(gp);
      for (GenVertex::particle_iterator it = gv->particles_begin(HepMC::children); it != gv->particles_end(HepMC::children); ++it)
        rtn += Particle(*it);
      return rtn;
    }

double E ( ) const [inline, inherited]

Get the energy directly.

Definition at line 42 of file ParticleBase.hh.

References FourMomentum::E(), and ParticleBase::momentum().

Referenced by Jet::hadronicEnergy(), and Jet::neutralEnergy().

{ return momentum().E(); }

double energy ( ) const [inline, inherited]

Get the energy directly (alias).

Definition at line 44 of file ParticleBase.hh.

References FourMomentum::E(), and ParticleBase::momentum().

{ return momentum().E(); }

double Et ( ) const [inline, inherited]

Get the $ E_T $ directly.

Definition at line 54 of file ParticleBase.hh.

References FourMomentum::Et(), and ParticleBase::momentum().

Referenced by CDF_2004_S5839831::analyze(), CentralEtHCM::project(), and NeutralFinalState::project().

{ return momentum().Et(); }

double eta ( ) const [inline, inherited]

Get the $\eta$ directly (alias).

Definition at line 64 of file ParticleBase.hh.

References FourVector::eta(), and ParticleBase::momentum().

{ return momentum().eta(); }

double flightLength ( ) const [inline]

Flight length (divide by mm or cm to get the appropriate units)

Definition at line 238 of file Particle.hh.

References Particle::genParticle(), Particle::isStable(), and Rivet::sqr().

                                {
      if (isStable()) return -1;
      if (genParticle() == NULL) return 0;
      if (genParticle()->production_vertex() == NULL) return 0;
      const HepMC::FourVector v1 = genParticle()->production_vertex()->position();
      const HepMC::FourVector v2 = genParticle()->end_vertex()->position();
      return sqrt(sqr(v2.x()-v1.x()) + sqr(v2.y()-v1.y()) + sqr(v2.z()-v1.z()));
    }

bool fromBottom ( ) const

Determine whether the particle is from a b-hadron decay.

Note:: This question is valid in MC, but may not be perfectly answerable experimentally -- use this function with care when replicating experimental analyses!

Todo:: Shouldn't a const vertex be being returned? Ah, HepMC...

Definition at line 34 of file Particle.cc.

References Particle::genParticle(), Particle::hasBottom(), Particle::isHadron(), Rivet::particles(), and Particle::pid().

Referenced by LHCB_2013_I1218996::analyze().

                                  {
    /// @todo Shouldn't a const vertex be being returned? Ah, HepMC...
    GenVertex* prodVtx = genParticle()->production_vertex();
    if (prodVtx == NULL) return false;
    foreach (const GenParticle* ancestor, particles(prodVtx, HepMC::ancestors)) {
      const PdgId pid = ancestor->pdg_id();
      if (ancestor->status() == 2 && (PID::isHadron(pid) && PID::hasBottom(pid))) return true;
    }
    return false;
  }

bool fromCharm ( ) const

Determine whether the particle is from a c-hadron decay.

Note:: If a hadron contains b and c quarks it is considered a bottom hadron and NOT a charm hadron.; This question is valid in MC, but may not be perfectly answerable experimentally -- use this function with care when replicating experimental analyses!

Todo:: Shouldn't a const vertex be being returned? Ah, HepMC...

Definition at line 46 of file Particle.cc.

References Particle::genParticle(), Particle::hasBottom(), Particle::hasCharm(), Particle::isHadron(), Rivet::particles(), and Particle::pid().

                                 {
    /// @todo Shouldn't a const vertex be being returned? Ah, HepMC...
    GenVertex* prodVtx = genParticle()->production_vertex();
    if (prodVtx == NULL) return false;
    foreach (const GenParticle* ancestor, particles(prodVtx, HepMC::ancestors)) {
      const PdgId pid = ancestor->pdg_id();
      if (ancestor->status() == 2 && (PID::isHadron(pid) && PID::hasCharm(pid) && !PID::hasBottom(pid))) return true;
    }
    return false;
  }

bool fromDecay ( ) const

Determine whether the particle is from a hadron or tau decay.

Specifically, walk up the ancestor chain until a status 2 hadron or tau is found, if at all.

Note:: This question is valid in MC, but may not be perfectly answerable experimentally -- use this function with care when replicating experimental analyses!

Todo:: Shouldn't a const vertex be being returned? Ah, HepMC...

Definition at line 22 of file Particle.cc.

References Particle::genParticle(), Particle::isHadron(), Rivet::particles(), Particle::pid(), and Rivet::PID::TAU.

Referenced by DressedLeptons::project().

                                 {
    /// @todo Shouldn't a const vertex be being returned? Ah, HepMC...
    GenVertex* prodVtx = genParticle()->production_vertex();
    if (prodVtx == NULL) return false;
    foreach (const GenParticle* ancestor, particles(prodVtx, HepMC::ancestors)) {
      const PdgId pid = ancestor->pdg_id();
      if (ancestor->status() == 2 && (PID::isHadron(pid) || abs(pid) == PID::TAU)) return true;
    }
    return false;
  }

bool fromTau ( ) const

Determine whether the particle is from a tau decay.

Note:: This question is valid in MC, but may not be perfectly answerable experimentally -- use this function with care when replicating experimental analyses!

Todo:: Shouldn't a const vertex be being returned? Ah, HepMC...

Definition at line 58 of file Particle.cc.

References Particle::genParticle(), Rivet::particles(), Particle::pid(), and Rivet::PID::TAU.

                               {
    /// @todo Shouldn't a const vertex be being returned? Ah, HepMC...
    GenVertex* prodVtx = genParticle()->production_vertex();
    if (prodVtx == NULL) return false;
    foreach (const GenParticle* ancestor, particles(prodVtx, HepMC::ancestors)) {
      const PdgId pid = ancestor->pdg_id();
      if (ancestor->status() == 2 && abs(pid) == PID::TAU) return true;
    }
    return false;
  }

const GenParticle* genParticle ( ) const [inline]

Get a const reference to the original GenParticle.

Definition at line 50 of file Particle.hh.

References Particle::_original.

Referenced by FinalState::accept(), Particle::allDescendants(), BABAR_2003_I593379::analyze(), BELLE_2006_S6265367::analyze(), BABAR_2005_S6181155::analyze(), BELLE_2001_S4598261::analyze(), ARGUS_1993_S2653028::analyze(), H1_2000_S4129130::analyze(), ARGUS_1993_S2669951::analyze(), H1_1994_S2919893::analyze(), BABAR_2007_S7266081::analyze(), ATLAS_2011_S8994773::analyze(), ATLAS_2011_S9035664::analyze(), CDF_2008_S7540469::analyze(), D0_2010_S8570965::analyze(), ARGUS_1993_S2789213::analyze(), ATLAS_2012_I1204447::analyze(), ATLAS_2010_S8894728::analyze(), InvMassFinalState::calc(), Particle::children(), Jet::containsBottom(), Jet::containsCharm(), Jet::containsParticle(), ATLAS_2011_I944826::daughtersSurviveCuts(), Particle::flightLength(), Particle::fromBottom(), Particle::fromCharm(), Particle::fromDecay(), Particle::fromTau(), ATLAS_2012_I1204447::get_tau_neutrino_mom(), LHCB_2010_S8758301::getLongestLivedAncestor(), LHCB_2011_I917009::getMotherLifeTimeSum(), LHCB_2012_I1119400::getMotherLifeTimeSum(), ATLAS_2011_I944826::getPerpFlightDistance(), Particle::hasAncestor(), hasDecayedTo(), Particle::isStable(), Particle::operator const GenParticle *(), MergedFinalState::project(), DISLepton::project(), PrimaryHadrons::project(), DISFinalState::project(), HeavyHadrons::project(), VetoedFinalState::project(), and Particle::stableDescendants().

                                           {
      return _original;
    }

bool hasAncestor ( PdgId pdg_id ) const

Check whether a given PID is found in the GenParticle's ancestor list

Note:: This question is valid in MC, but may not be answerable experimentally -- use this function with care when replicating experimental analyses!

Todo:: Neaten this up with C++11, via one waliker function and several uses with lamba tests

Todo:: Shouldn't a const vertex be being returned? Ah, HepMC...

Definition at line 11 of file Particle.cc.

References Particle::genParticle(), and Rivet::particles().

Referenced by ALICE_2011_S8909580::analyze(), ALICE_2011_S8945144::analyze(), CMS_2011_S8978280::analyze(), and ATLAS_2012_I1204447::analyze().

                                               {
    /// @todo Shouldn't a const vertex be being returned? Ah, HepMC...
    GenVertex* prodVtx = genParticle()->production_vertex();
    if (prodVtx == 0) return false;
    foreach (const GenParticle* ancestor, particles(prodVtx, HepMC::ancestors)) {
      if (ancestor->pdg_id() == pdg_id) return true;
    }
    return false;
  }

bool hasBottom ( ) const [inline]

Does this (hadron) contain a b quark?

Definition at line 113 of file Particle.hh.

References Particle::pdgId().

Referenced by Particle::fromBottom(), and Particle::fromCharm().

{ return PID::hasBottom(pdgId()); }

bool hasCharm ( ) const [inline]

Does this (hadron) contain a c quark?

Definition at line 116 of file Particle.hh.

References Particle::pdgId().

Referenced by LHCB_2013_I1218996::analyze(), and Particle::fromCharm().

{ return PID::hasCharm(pdgId()); }

bool isBaryon ( ) const [inline]

Is this a baryon?

Definition at line 104 of file Particle.hh.

References Particle::pdgId().

{ return PID::isBaryon(pdgId()); }

bool isHadron ( ) const [inline]

Is this a hadron?

Definition at line 98 of file Particle.hh.

References Particle::pdgId().

Referenced by LHCB_2013_I1218996::analyze(), Particle::fromBottom(), Particle::fromCharm(), and Particle::fromDecay().

{ return PID::isHadron(pdgId()); }

bool isLepton ( ) const [inline]

Is this a lepton?

Definition at line 107 of file Particle.hh.

References Particle::pdgId().

{ return PID::isLepton(pdgId()); }

bool isMeson ( ) const [inline]

Is this a meson?

Definition at line 101 of file Particle.hh.

References Particle::pdgId().

{ return PID::isMeson(pdgId()); }

bool isNeutrino ( ) const [inline]

Is this a neutrino?

Definition at line 110 of file Particle.hh.

References Particle::pdgId().

{ return PID::isNeutrino(pdgId()); }

bool isStable ( ) const [inline]

Whether this particle is stable according to the generator.

Definition at line 185 of file Particle.hh.

References Particle::genParticle().

Referenced by Particle::allDescendants(), Particle::children(), Particle::flightLength(), and Particle::stableDescendants().

                          {
      return genParticle() != NULL && genParticle()->status() == 1 && genParticle()->end_vertex() == NULL;
    }

double mass ( ) const [inline, inherited]

Get the mass directly.

Definition at line 57 of file ParticleBase.hh.

References FourMomentum::mass(), and ParticleBase::momentum().

Referenced by ALICE_2011_S8945144::analyze().

{ return momentum().mass(); }

double mass2 ( ) const [inline, inherited]

Get the mass**2 directly.

Definition at line 59 of file ParticleBase.hh.

References FourMomentum::mass2(), and ParticleBase::momentum().

{ return momentum().mass2(); }

const FourMomentum& momentum ( ) const [inline, virtual]

The momentum.

Implements ParticleBase.

Definition at line 58 of file Particle.hh.

References Particle::_momentum.

                                         {
      return _momentum;
    }

operator const FourMomentum & ( ) const [inline, inherited]

Cast operator for conversion to FourMomentum.

Definition at line 29 of file ParticleBase.hh.

References ParticleBase::momentum().

{ return momentum(); }

operator const GenParticle * ( ) const [inline]

Cast operator for conversion to GenParticle*.

Definition at line 55 of file Particle.hh.

References Particle::genParticle().

{ return genParticle(); }

PdgId pdgId ( ) const [inline]

This Particle's PDG ID code (alias). pid/abspid form is nicer (don't need to remember lower/upper case, doesn't visually stick out in the code, etc. ...)

Definition at line 80 of file Particle.hh.

References Particle::_id.

Referenced by Rivet::PID::abspid(), BABAR_2003_I593379::analyze(), CLEO_2004_S5809304::analyze(), BABAR_2005_S6181155::analyze(), BABAR_2007_S6895344::analyze(), BELLE_2001_S4598261::analyze(), BELLE_2006_S6265367::analyze(), ARGUS_1993_S2653028::analyze(), OPAL_1994_S2927284::analyze(), PDG_HADRON_MULTIPLICITIES::analyze(), PDG_HADRON_MULTIPLICITIES_RATIOS::analyze(), OPAL_1993_S2692198::analyze(), TOTEM_2012_002::analyze(), SLD_2004_S5693039::analyze(), CMS_2010_S8656010::analyze(), OPAL_1998_S3780481::analyze(), CMS_2012_PAS_QCD_11_010::analyze(), LHCF_2012_I1115479::analyze(), ALICE_2011_S8945144::analyze(), ALICE_2011_S8909580::analyze(), SLD_1999_S3743934::analyze(), ARGUS_1993_S2669951::analyze(), OPAL_1995_S3198391::analyze(), OPAL_1997_S3608263::analyze(), OPAL_2000_S4418603::analyze(), ALEPH_2002_S4823664::analyze(), H1_1994_S2919893::analyze(), ALICE_2012_I1181770::analyze(), OPAL_1996_S3257789::analyze(), OPAL_1998_S3702294::analyze(), DELPHI_1999_S3960137::analyze(), BABAR_2007_S7266081::analyze(), CMS_2010_S8547297::analyze(), DELPHI_1995_S3137023::analyze(), ATLAS_2011_S9035664::analyze(), CDF_1993_S2742446::analyze(), OPAL_2002_S5361494::analyze(), CMS_2011_S8973270::analyze(), DELPHI_2000_S4328825::analyze(), SLD_1996_S3398250::analyze(), CDF_2008_S7540469::analyze(), OPAL_1998_S3749908::analyze(), LHCB_2011_I919315::analyze(), MC_WINC::analyze(), OPAL_1997_S3396100::analyze(), MC_IDENTIFIED::analyze(), STAR_2006_S6500200::analyze(), CMS_2011_S8978280::analyze(), STAR_2006_S6860818::analyze(), CMS_2011_S8884919::analyze(), ATLAS_2012_I1082009::analyze(), LHCB_2010_S8758301::analyze(), ARGUS_1993_S2789213::analyze(), ALEPH_1999_S4193598::analyze(), CDF_2008_S7541902::analyze(), ATLAS_2012_I1183818::analyze(), LHCB_2011_I917009::analyze(), ATLAS_2012_CONF_2012_104::analyze(), ATLAS_2012_I1126136::analyze(), STAR_2008_S7869363::analyze(), ATLAS_2012_I1095236::analyze(), LHCB_2012_I1119400::analyze(), ATLAS_2012_I1180197::analyze(), ATLAS_2012_CONF_2012_109::analyze(), ATLAS_2012_CONF_2012_153::analyze(), MC_SUSY::analyze(), ALEPH_1996_S3486095::analyze(), ATLAS_2011_I944826::analyze(), DELPHI_1996_S3430090::analyze(), InvMassFinalState::calc(), Particle::charge(), Rivet::chargedParticleFilter(), Jet::containsBottom(), Jet::containsCharm(), Jet::containsParticleId(), Rivet::hadronFilter(), Jet::hadronicEnergy(), Rivet::PID::hasBottom(), Particle::hasBottom(), Rivet::PID::hasCharm(), Particle::hasCharm(), Rivet::PID::hasDown(), Rivet::PID::hasStrange(), Rivet::PID::hasTop(), Rivet::PID::hasUp(), LeadingParticlesFinalState::inList(), Rivet::PID::isBaryon(), Particle::isBaryon(), Rivet::PID::isDiQuark(), Rivet::PID::isHadron(), Particle::isHadron(), Rivet::isInvisibleFilter(), Rivet::PID::isLepton(), Particle::isLepton(), Rivet::PID::isMeson(), Particle::isMeson(), Particle::isNeutrino(), Rivet::PID::isNucleus(), ATLAS_2012_I1204447::isonZ(), Rivet::PID::isPentaquark(), Rivet::PID::isRhadron(), Rivet::PID::isSUSY(), Rivet::PID::jSpin(), Rivet::PID::lSpin(), Jet::neutralEnergy(), Rivet::nonHadronFilter(), ChargedLeptons::project(), DISLepton::project(), PrimaryHadrons::project(), NeutralFinalState::project(), HeavyHadrons::project(), IdentifiedFinalState::project(), FinalState::project(), ZFinder::project(), VetoedFinalState::project(), WFinder::project(), Rivet::PID::sSpin(), Rivet::PID::threeCharge(), and Particle::threeCharge().

{ return _id; }

double perp ( ) const [inline, inherited]

Get the $ p_T $ directly (alias).

Definition at line 51 of file ParticleBase.hh.

References ParticleBase::pt().

{ return pt(); }

double phi ( ) const [inline, inherited]

Get the $\phi$ directly.

Definition at line 80 of file ParticleBase.hh.

References ParticleBase::momentum(), and FourVector::phi().

Referenced by ATLAS_2012_I1199269::analyze(), and CDF_2001_S4751469::analyze().

{ return momentum().phi(); }

PdgId pid ( ) const [inline]

This Particle's PDG ID code.

Definition at line 74 of file Particle.hh.

References Particle::_id.

Referenced by Particle::fromBottom(), Particle::fromCharm(), Particle::fromDecay(), and Particle::fromTau().

{ return _id; }

double pseudorapidity ( ) const [inline, inherited]

Get the $\eta$ directly.

Definition at line 62 of file ParticleBase.hh.

References FourVector::eta(), and ParticleBase::momentum().

{ return momentum().eta(); }

double pt ( ) const [inline, inherited]

Get the $ p_T $ directly.

Definition at line 47 of file ParticleBase.hh.

References ParticleBase::momentum(), and FourMomentum::pt().

Referenced by ParticleBase::perp(), and ParticleBase::pT().

{ return momentum().pt(); }

double pT ( ) const [inline, inherited]

Get the $ p_T $ directly (alias).

Definition at line 49 of file ParticleBase.hh.

References ParticleBase::pt().

{ return pt(); }

double rap ( ) const [inline, inherited]

Get the $ y $ directly (alias).

Definition at line 73 of file ParticleBase.hh.

References ParticleBase::momentum(), and FourMomentum::rapidity().

{ return momentum().rapidity(); }

double rapidity ( ) const [inline, inherited]

Get the $ y $ directly.

Definition at line 71 of file ParticleBase.hh.

References ParticleBase::momentum(), and FourMomentum::rapidity().

{ return momentum().rapidity(); }

Particle& setMomentum ( const FourMomentum & momentum ) [inline]

Set the momentum.

Definition at line 62 of file Particle.hh.

References Particle::_momentum, and Particle::momentum().

Referenced by ClusteredLepton::addPhoton(), and DISFinalState::project().

                                                        {
      _momentum = momentum;
      return *this;
    }

vector<Particle> stableDescendants ( ) const [inline]

Get a list of all the stable descendants from the current particle

Todo:

Use recursion through replica-avoiding MCUtils functions to avoid bookkeeping duplicates

Insist that the current particle is post-hadronization, otherwise throw an exception?

Todo:: Remove this const mess crap when HepMC doesn't suck

Todo:: Would like to do this, but the range objects are broken

Definition at line 222 of file Particle.hh.

References Particle::genParticle(), Particle::isStable(), and Particle::Particle().

                                               {
      vector<Particle> rtn;
      if (isStable()) return rtn;
      /// @todo Remove this const mess crap when HepMC doesn't suck
      HepMC::GenVertex* gv = const_cast<HepMC::GenVertex*>( genParticle()->end_vertex() );
      /// @todo Would like to do this, but the range objects are broken
      // foreach (const GenParticle* gp, gv->particles(HepMC::descendants))
      //   if (gp->status() == 1 && gp->end_vertex() == NULL)
      //     rtn += Particle(gp);
      for (GenVertex::particle_iterator it = gv->particles_begin(HepMC::descendants); it != gv->particles_end(HepMC::descendants); ++it)
        if ((*it)->status() == 1 && (*it)->end_vertex() == NULL)
          rtn += Particle(*it);
      return rtn;
    }

int threeCharge ( ) const [inline]

Three times the charge of this Particle (i.e. integer multiple of smallest quark charge).

Definition at line 93 of file Particle.hh.

References Particle::pdgId().

                            {
      return PID::threeCharge(pdgId());
    }

Member Data Documentation

PdgId _id [private]

The PDG ID code for this Particle.

Definition at line 256 of file Particle.hh.

Referenced by Particle::abspid(), Particle::pdgId(), and Particle::pid().

FourMomentum _momentum [private]

The momentum of this projection of the Particle.

Definition at line 259 of file Particle.hh.

Referenced by Particle::momentum(), and Particle::setMomentum().

const GenParticle* _original [private]

A pointer to the original GenParticle from which this Particle is projected.

Definition at line 253 of file Particle.hh.

Referenced by Particle::genParticle().

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

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation