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DISKinematics Class Reference

Get the DIS kinematic variables and relevant boosts for an event. More...

#include <DISKinematics.hh>

Inheritance diagram for DISKinematics:
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List of all members.

Public Member Functions

 DISKinematics ()
 The default constructor.
virtual const Projection * clone () const
 Clone on the heap.
double Q2 () const
 The $Q^2$.
double W2 () const
 The $W^2$.
double x () const
 The Bjorken $x$.
double y () const
 The Inelasticity $y$.
double s () const
 The centre of mass energy $s$.
const LorentzTransform & boostHCM () const
 The LorentzRotation needed to boost a particle to the hadronic CM frame.
const LorentzTransform & boostBreit () const
 The LorentzRotation needed to boost a particle to the hadronic Breit frame.
const Particle & beamHadron () const
 The incoming Hadron beam particle.
bool before (const Projection &p) const
virtual const std::set< PdgIdPair > beamPairs () const
virtual std::string name () const
 Get the name of the projection.
Projection & addPdgIdPair (PdgId beam1, PdgId beam2)
 Add a colliding beam pair.
Log & getLog () const
 Get a Log object based on the getName() property of the calling projection object.
void setName (const std::string &name)
 Used by derived classes to set their name.
Projection "getting" functions
std::set< ConstProjectionPtr > getProjections () const
 Get the contained projections, including recursion.
template<typename PROJ >
const PROJ & getProjection (const std::string &name) const
 Get the named projection, specifying return type via a template argument.
const Projection & getProjection (const std::string &name) const
Projection applying functions
template<typename PROJ >
const PROJ & applyProjection (const Event &evt, const PROJ &proj) const
 Apply the supplied projection on event.
template<typename PROJ >
const PROJ & applyProjection (const Event &evt, const Projection &proj) const
 Apply the supplied projection on event.
template<typename PROJ >
const PROJ & applyProjection (const Event &evt, const std::string &name) const
 Apply the named projection on event.

Protected Member Functions

virtual void project (const Event &e)
 Perform the projection operation on the supplied event.
virtual int compare (const Projection &p) const
 Compare with other projections.
Cmp< Projection > mkNamedPCmp (const Projection &otherparent, const std::string &pname) const
Cmp< Projection > mkPCmp (const Projection &otherparent, const std::string &pname) const
ProjectionHandler & getProjHandler () const
 Get a reference to the ProjectionHandler for this thread.
Projection registration functions
template<typename PROJ >
const PROJ & addProjection (const PROJ &proj, const std::string &name)
const Projection & _addProjection (const Projection &proj, const std::string &name)
 Untemplated function to do the work...

Protected Attributes

bool _allowProjReg
 Flag to forbid projection registration in analyses until the init phase.

Private Attributes

double _theQ2
 The $Q^2$.
double _theW2
 The $W^2$.
double _theX
 The Bjorken $x$.
double _theY
 The Inelasticity $y$.
double _theS
 The centre of mass energy $s$.
Particle _inHadron
LorentzTransform _hcm
 The LorentzRotation needed to boost a particle to the hadronic CM frame.
LorentzTransform _breit
 The LorentzRotation needed to boost a particle to the hadronic Breit frame.

Friends

class Event
 Event is a friend.
class Cmp< Projection >
 The Cmp specialization for Projection is a friend.

Detailed Description

Get the DIS kinematic variables and relevant boosts for an event.

Definition at line 15 of file DISKinematics.hh.

Constructor & Destructor Documentation

DISKinematics ( ) [inline]

The default constructor.

Definition at line 20 of file DISKinematics.hh.

References ProjectionApplier::addProjection(), and Projection::setName().

Referenced by DISKinematics::clone().

      : _theQ2(-1.0), _theW2(-1.0), _theX(-1.0), _theY(-1.0), _theS(-1.0)
    {
      setName("DISKinematics");
      //addPdgIdPair(ANY, hadid);
      addProjection(Beam(), "Beam");
      addProjection(DISLepton(), "Lepton");
    }

Member Function Documentation

const Projection & _addProjection ( const Projection &  proj,
const std::string &  name 
) [protected, inherited]

Untemplated function to do the work...

Definition at line 33 of file ProjectionApplier.cc.

References ProjectionApplier::_allowProjReg, ProjectionApplier::getProjHandler(), ProjectionApplier::name(), Projection::name(), and ProjectionHandler::registerProjection().

Referenced by ProjectionApplier::addProjection().

                                                                             {
    if (!_allowProjReg) {
      cerr << "Trying to register projection '"
           << proj.name() << "' before init phase in '" << this->name() << "'." << endl;
      exit(2);
    }
    const Projection& reg = getProjHandler().registerProjection(*this, proj, name);
    return reg;
  }
Projection& addPdgIdPair ( PdgId  beam1,
PdgId  beam2 
) [inline, inherited]

Add a colliding beam pair.

Definition at line 109 of file Projection.hh.

References Projection::_beamPairs.

Referenced by Projection::Projection().

                                                       {
      _beamPairs.insert(PdgIdPair(beam1, beam2));
      return *this;
    }
const PROJ& addProjection ( const PROJ &  proj,
const std::string &  name 
) [inline, protected, inherited]

Register a contained projection. The type of the argument is used to instantiate a new projection internally: this new object is applied to events rather than the argument object. Hence you are advised to only use locally-scoped Projection objects in your Projection and Analysis constructors, and to avoid polymorphism (e.g. handling ConcreteProjection via a pointer or reference to type Projection) since this will screw up the internal type management.

Definition at line 116 of file ProjectionApplier.hh.

References ProjectionApplier::_addProjection().

Referenced by VetoedFinalState::addVetoOnThisFinalState(), BeamThrust::BeamThrust(), CDF_2009_S8057893::CDF_2009_S8057893::init(), CentralEtHCM::CentralEtHCM(), ChargedFinalState::ChargedFinalState(), ChargedLeptons::ChargedLeptons(), DISFinalState::DISFinalState(), DISKinematics::DISKinematics(), DISLepton::DISLepton(), DressedLeptons::DressedLeptons(), FinalState::FinalState(), FoxWolframMoments::FoxWolframMoments(), FParameter::FParameter(), HadronicFinalState::HadronicFinalState(), HeavyHadrons::HeavyHadrons(), Hemispheres::Hemispheres(), IdentifiedFinalState::IdentifiedFinalState(), CMS_2010_S8656010::init(), CMS_2010_S8547297::init(), ATLAS_2010_S8894728::init(), ALICE_2012_I1181770::init(), ATLAS_2011_S8994773::init(), CMS_2011_S8950903::init(), CMS_2012_PAS_QCD_11_010::init(), CMS_2011_S8978280::init(), ATLAS_2010_CONF_2010_049::init(), ATLAS_2011_I894867::init(), LHCB_2013_I1208105::init(), ALICE_2011_S8909580::init(), CMS_2011_S8941262::init(), CMS_2011_S8968497::init(), CMS_2011_S8973270::init(), CMS_2011_S9086218::init(), CMS_2011_S9215166::init(), TOTEM_2012_I1115294::init(), CMS_2012_I1087342::init(), CMS_2012_I1184941::init(), CMS_2012_I1193338::init(), ALICE_2011_S8945144::init(), CDF_2007_S7057202::init(), TOTEM_2012_002::init(), CMS_2011_I954992::init(), CMS_2011_S8957746::init(), ATLAS_2010_S8591806::init(), ATLAS_2011_S9002537::init(), D0_2011_I895662::init(), CMS_2011_S9088458::init(), LHCF_2012_I1115479::init(), ATLAS_2011_I930220::init(), D0_2010_S8570965::init(), MC_JETS::init(), MC_KTSPLITTINGS::init(), CDF_2012_NOTE10874::init(), STAR_2006_S6500200::init(), STAR_2008_S7993412::init(), UA5_1987_S1640666::init(), CMS_2013_I1209721::init(), CMS_QCD_10_024::init(), CDF_1997_S3541940::init(), BABAR_2007_S7266081::init(), ATLAS_2011_S9128077::init(), CDF_1993_S2742446::init(), CDF_2000_S4155203::init(), CDF_2005_S6080774::init(), MC_DIJET::init(), MC_DIPHOTON::init(), CDF_2006_S6450792::init(), MC_HINC::init(), MC_WINC::init(), MC_ZINC::init(), MC_ZZINC::init(), SFM_1984_S1178091::init(), ARGUS_1993_S2789213::init(), ATLAS_2012_I1204784::init(), CMS_2013_I1258128::init(), MC_ZKTSPLITTINGS::init(), STAR_2006_S6870392::init(), UA5_1982_S875503::init(), UA5_1989_S1926373::init(), D0_2008_S6879055::init(), D0_2010_S8821313::init(), MC_HJETS::init(), MC_HKTSPLITTINGS::init(), MC_PHOTONINC::init(), CDF_2008_S8093652::init(), MC_WKTSPLITTINGS::init(), MC_WWINC::init(), MC_ZJETS::init(), CDF_2008_S7782535::init(), ARGUS_1993_S2669951::init(), MC_ZZJETS::init(), MC_ZZKTSPLITTINGS::init(), ATLAS_2012_I1091481::init(), ALEPH_1991_S2435284::init(), CMS_2012_I1102908::init(), MC_WWKTSPLITTINGS::init(), ATLAS_2012_I1183818::init(), ATLAS_2013_I1243871::init(), D0_2008_S7863608::init(), ATLAS_2011_S9035664::init(), D0_2010_S8671338::init(), CMS_2012_I1107658::init(), E735_1998_S3905616::init(), MC_PHOTONJETS::init(), MC_PHOTONKTSPLITTINGS::init(), MC_WJETS::init(), MC_WWJETS::init(), ATLAS_2011_I944826::init(), CDF_1990_S2089246::init(), UA5_1986_S1583476::init(), CDF_1988_S1865951::init(), EXAMPLE_CUTS::init(), ALEPH_2002_S4823664::init(), MC_GENERIC::init(), CDF_2005_S6217184::init(), MC_IDENTIFIED::init(), MC_LEADJETUE::init(), MC_TTBAR::init(), MC_PHOTONJETUE::init(), OPAL_1995_S3198391::init(), OPAL_1996_S3257789::init(), OPAL_1997_S3608263::init(), OPAL_1998_S3702294::init(), OPAL_1998_S3749908::init(), OPAL_2000_S4418603::init(), ATLAS_2011_S8924791::init(), ATLAS_2010_S8817804::init(), D0_1996_S3324664::init(), D0_2007_S7075677::init(), ALEPH_1996_S3196992::init(), D0_2009_S8202443::init(), DELPHI_1999_S3960137::init(), ATLAS_2011_I945498::init(), ATLAS_2011_I954993::init(), ATLAS_2012_I1119557::init(), D0_2001_S4674421::init(), D0_2008_S7554427::init(), CDF_1994_S2952106::init(), H1_1995_S3167097::init(), MC_QCD_PARTONS::init(), UA1_1990_S2044935::init(), ZEUS_2001_S4815815::init(), ATLAS_2012_I1188891::init(), D0_2008_S7837160::init(), ATLAS_2011_S9131140::init(), LHCB_2011_I919315::init(), CDF_2008_S7540469::init(), CDF_2008_S7828950::init(), STAR_2009_UE_HELEN::init(), CMS_2012_I941555::init(), STAR_2006_S6860818::init(), ALICE_2010_S8624100::init(), JADE_1998_S3612880::init(), OPAL_1997_S3396100::init(), JADE_OPAL_2000_S4300807::init(), EXAMPLE::init(), CDF_2008_S8095620::init(), D0_1996_S3214044::init(), DELPHI_1995_S3137023::init(), MC_PHOTONS::init(), MC_SUSY::init(), ATLAS_2011_I925932::init(), ALEPH_2004_S5765862::init(), ATLAS_2012_I1125575::init(), CMS_2013_I1218372::init(), ALICE_2010_S8625980::init(), ALICE_2010_S8706239::init(), LHCB_2013_I1218996::init(), CDF_2009_NOTE_9936::init(), D0_2000_S4480767::init(), CDF_2009_S8383952::init(), ATLAS_2011_I926145::init(), CDF_2009_S8436959::init(), ATLAS_2011_S8971293::init(), CDF_1998_S3618439::init(), D0_2009_S8349509::init(), CDF_2000_S4266730::init(), CDF_1996_S3108457::init(), D0_2009_S8320160::init(), CDF_2001_S4563131::init(), MC_WPOL::init(), DELPHI_2002_069_CONF_603::init(), SLD_2002_S4869273::init(), ATLAS_2010_S8919674::init(), CDF_1996_S3349578::init(), D0_2006_S6438750::init(), ALEPH_2001_S4656318::init(), CDF_2001_S4517016::init(), ATLAS_2012_I1082936::init(), D0_2010_S8566488::init(), CDF_1996_S3418421::init(), SLD_1996_S3398250::init(), UA5_1988_S1867512::init(), D0_2008_S7662670::init(), ATLAS_2011_S9108483::init(), CDF_2006_S6653332::init(), CDF_2008_S7541902::init(), ATLAS_2013_I1230812::init(), ATLAS_2012_I1095236::init(), ATLAS_2012_CONF_2012_109::init(), ATLAS_2012_I1083318::init(), ATLAS_2012_I1125961::init(), ATLAS_2011_S9212183::init(), OPAL_2002_S5361494::init(), ATLAS_2012_CONF_2012_104::init(), ATLAS_2011_S8983313::init(), ATLAS_2012_I1190891::init(), ATLAS_2012_I943401::init(), ATLAS_2012_I946427::init(), ATLAS_2011_S9225137::init(), ATLAS_2012_I1082009::init(), ATLAS_2013_I1217867::init(), ATLAS_2011_CONF_2011_090::init(), ATLAS_2011_S9212353::init(), ATLAS_2012_CONF_2012_105::init(), ATLAS_2012_CONF_2012_001::init(), DELPHI_2000_S4328825::init(), ATLAS_2012_CONF_2012_103::init(), TASSO_1990_S2148048::init(), ATLAS_2011_S9019561::init(), ATLAS_2012_I1117704::init(), ATLAS_2012_I1112263::init(), ATLAS_2012_I1180197::init(), ATLAS_2011_CONF_2011_098::init(), CMS_2013_I1224539_ZJET::init(), ATLAS_2012_I1126136::init(), ATLAS_2012_I1084540::init(), CMS_2013_I1224539_WJET::init(), CMS_2013_I1224539_DIJET::init(), ATLAS_2012_I1186556::init(), CDF_2009_S8233977::init(), CDF_2010_S8591881_DY::init(), ATLAS_2012_CONF_2012_153::init(), CDF_2010_S8591881_QCD::init(), D0_2004_S5992206::init(), ATLAS_2010_S8914702::init(), LHCB_2011_I917009::init(), CDF_2001_S4751469::init(), ATLAS_2011_S9120807::init(), D0_2008_S7719523::init(), ATLAS_2010_S8918562::init(), LHCB_2012_I1119400::init(), ATLAS_2011_S9041966::init(), ATLAS_2012_I1094568::init(), DELPHI_1996_S3430090::init(), ALEPH_1996_S3486095::init(), ALEPH_1999_S4193598::init(), ATLAS_2012_I1093738::init(), OPAL_2004_S6132243::init(), OPAL_1994_S2927284::init(), STAR_2008_S7869363::init(), BABAR_2007_S6895344::init(), ATLAS_2011_S9126244::init(), MC_VH2BB::init(), BABAR_2005_S6181155::init(), BELLE_2001_S4598261::init(), ATLAS_2011_I919017::init(), OPAL_2001_S4553896::init(), DELPHI_2003_WUD_03_11::init(), CDF_2004_S5839831::init(), BABAR_2003_I593379::init(), ARGUS_1993_S2653028::init(), CLEO_2004_S5809304::init(), OPAL_1998_S3780481::init(), OPAL_1993_S2692198::init(), ATLAS_2012_I1093734::init(), ATLAS_2012_I1094564::init(), H1_1994_S2919893::init(), H1_2000_S4129130::init(), SLD_2004_S5693039::init(), BELLE_2006_S6265367::init(), SLD_1999_S3743934::init(), PDG_HADRON_MULTIPLICITIES::init(), PDG_HADRON_MULTIPLICITIES_RATIOS::init(), JetAlg::JetAlg(), JetShape::JetShape(), LeadingParticlesFinalState::LeadingParticlesFinalState(), LossyFinalState< ConstRandomFilter >::LossyFinalState(), MergedFinalState::MergedFinalState(), MissingMomentum::MissingMomentum(), NeutralFinalState::NeutralFinalState(), NonHadronicFinalState::NonHadronicFinalState(), ParisiTensor::ParisiTensor(), PrimaryHadrons::PrimaryHadrons(), Sphericity::Sphericity(), Spherocity::Spherocity(), Thrust::Thrust(), TriggerCDFRun0Run1::TriggerCDFRun0Run1(), TriggerCDFRun2::TriggerCDFRun2(), TriggerUA5::TriggerUA5(), VetoedFinalState::VetoedFinalState(), VisibleFinalState::VisibleFinalState(), WFinder::WFinder(), and ZFinder::ZFinder().

                                                                       {
      const Projection& reg = _addProjection(proj, name);
      const PROJ& rtn = dynamic_cast<const PROJ&>(reg);
      return rtn;
    }
const PROJ& applyProjection ( const Event &  evt,
const PROJ &  proj 
) const [inline, inherited]

Apply the supplied projection on event.

Definition at line 70 of file ProjectionApplier.hh.

References ProjectionApplier::_applyProjection().

Referenced by DISFinalState::project().

                                                                          {
      return pcast<PROJ>(_applyProjection(evt, proj));
    }
const PROJ& applyProjection ( const Event &  evt,
const Projection &  proj 
) const [inline, inherited]

Apply the supplied projection on event.

Definition at line 77 of file ProjectionApplier.hh.

References ProjectionApplier::_applyProjection().

                                                                                {
      return pcast<PROJ>(_applyProjection(evt, proj));
    }
const PROJ& applyProjection ( const Event &  evt,
const std::string &  name 
) const [inline, inherited]

Apply the named projection on event.

Definition at line 84 of file ProjectionApplier.hh.

References ProjectionApplier::_applyProjection().

                                                                               {
      return pcast<PROJ>(_applyProjection(evt, name));
    }
const Particle& beamHadron ( ) const [inline]

The incoming Hadron beam particle.

Definition at line 74 of file DISKinematics.hh.

References DISKinematics::_inHadron.

                                       {
      return _inHadron;
    }
const set< PdgIdPair > beamPairs ( ) const [virtual, inherited]

Return the allowed beam pairs on which this projection can operate, not including recursion. Derived classes should ensure that all contained projections are registered in the _projections set for the beam constraint chaining to work.

Todo:
Remove the beam constraints system from projections.

Definition at line 33 of file Projection.cc.

References Projection::_beamPairs, Projection::beamPairs(), Projection::getLog(), ProjectionApplier::getProjections(), Rivet::intersection(), and Log::TRACE.

Referenced by Projection::beamPairs().

                                                   {
    set<PdgIdPair> ret = _beamPairs;
    set<ConstProjectionPtr> projs = getProjections();
    for (set<ConstProjectionPtr>::const_iterator ip = projs.begin(); ip != projs.end(); ++ip) {
      ConstProjectionPtr p = *ip;
      getLog() << Log::TRACE << "Proj addr = " << p << endl;
      if (p) ret = intersection(ret, p->beamPairs());
    }
    return ret;
  }
bool before ( const Projection &  p) const [inherited]

Determine whether this object should be ordered before the object p given as argument. If p is of a different class than this, the before() function of the corresponding type_info objects is used. Otherwise, if the objects are of the same class, the virtual compare(const Projection &) will be returned.

Definition at line 22 of file Projection.cc.

References Projection::compare().

Referenced by less< const Rivet::Projection * >::operator()().

                                                   {
    const std::type_info& thisid = typeid(*this);
    const std::type_info& otherid = typeid(p);
    if (thisid == otherid) {
      return compare(p) < 0;
    } else {
      return thisid.before(otherid);
    }
  }
const LorentzTransform& boostBreit ( ) const [inline]

The LorentzRotation needed to boost a particle to the hadronic Breit frame.

Definition at line 69 of file DISKinematics.hh.

References DISKinematics::_breit.

Referenced by DISFinalState::project().

                                               {
      return _breit;
    }
const LorentzTransform& boostHCM ( ) const [inline]

The LorentzRotation needed to boost a particle to the hadronic CM frame.

Definition at line 64 of file DISKinematics.hh.

References DISKinematics::_hcm.

Referenced by DISFinalState::project().

                                             {
      return _hcm;
    }
virtual const Projection* clone ( ) const [inline, virtual]

Clone on the heap.

Implements Projection.

Definition at line 30 of file DISKinematics.hh.

References DISKinematics::DISKinematics().

                                            {
      return new DISKinematics(*this);
    }
int compare ( const Projection &  p) const [protected, virtual]

Compare with other projections.

Implements Projection.

Definition at line 69 of file DISKinematics.cc.

References Projection::mkNamedPCmp().

                                                       {
    const DISKinematics& other = pcast<DISKinematics>(p);
    return mkNamedPCmp(other, "Lepton");
  }
Log& getLog ( ) const [inline, inherited]

Get a Log object based on the getName() property of the calling projection object.

Reimplemented from ProjectionApplier.

Definition at line 116 of file Projection.hh.

References Projection::name().

Referenced by Projection::beamPairs(), InvMassFinalState::calc(), ChargedFinalState::project(), InitialQuarks::project(), UnstableFinalState::project(), LossyFinalState< ConstRandomFilter >::project(), and VetoedFinalState::project().

                        {
      string logname = "Rivet.Projection." + name();
      return Log::getLog(logname);
    }
const PROJ& getProjection ( const std::string &  name) const [inline, inherited]

Get the named projection, specifying return type via a template argument.

Definition at line 52 of file ProjectionApplier.hh.

References ProjectionHandler::getProjection(), and ProjectionApplier::getProjHandler().

Referenced by ProjectionApplier::_applyProjection(), Rivet::pcmp(), and Hemispheres::project().

                                                           {
      const Projection& p = getProjHandler().getProjection(*this, name);
      return pcast<PROJ>(p);
    }
const Projection& getProjection ( const std::string &  name) const [inline, inherited]

Get the named projection (non-templated, so returns as a reference to a Projection base class).

Definition at line 60 of file ProjectionApplier.hh.

References ProjectionHandler::getProjection(), and ProjectionApplier::getProjHandler().

                                                                 {
      return getProjHandler().getProjection(*this, name);
    }
std::set<ConstProjectionPtr> getProjections ( ) const [inline, inherited]

Get the contained projections, including recursion.

Definition at line 45 of file ProjectionApplier.hh.

References ProjectionHandler::DEEP, ProjectionHandler::getChildProjections(), and ProjectionApplier::getProjHandler().

Referenced by Projection::beamPairs().

                                                      {
      return getProjHandler().getChildProjections(*this, ProjectionHandler::DEEP);
    }
ProjectionHandler& getProjHandler ( ) const [inline, protected, inherited]

Get a reference to the ProjectionHandler for this thread.

Definition at line 97 of file ProjectionApplier.hh.

References ProjectionApplier::_projhandler.

Referenced by ProjectionApplier::_addProjection(), ProjectionApplier::getProjection(), ProjectionApplier::getProjections(), and ProjectionApplier::~ProjectionApplier().

                                              {
      return _projhandler;
    }
Cmp< Projection > mkNamedPCmp ( const Projection &  otherparent,
const std::string &  pname 
) const [protected, inherited]

Shortcut to make a named Cmp<Projection> comparison with the *this object automatically passed as one of the parent projections.

Definition at line 45 of file Projection.cc.

References Rivet::pcmp().

Referenced by BeamThrust::compare(), ChargedLeptons::compare(), FParameter::compare(), CentralEtHCM::compare(), MergedFinalState::compare(), DISLepton::compare(), ChargedFinalState::compare(), DISKinematics::compare(), DISFinalState::compare(), NeutralFinalState::compare(), VisibleFinalState::compare(), LeadingParticlesFinalState::compare(), ParisiTensor::compare(), Spherocity::compare(), FoxWolframMoments::compare(), DressedLeptons::compare(), LossyFinalState< ConstRandomFilter >::compare(), MissingMomentum::compare(), Thrust::compare(), InvMassFinalState::compare(), Sphericity::compare(), Hemispheres::compare(), ZFinder::compare(), IdentifiedFinalState::compare(), WFinder::compare(), JetShape::compare(), VetoedFinalState::compare(), and FastJets::compare().

                                                                     {
    return pcmp(*this, otherparent, pname);
  }
Cmp< Projection > mkPCmp ( const Projection &  otherparent,
const std::string &  pname 
) const [protected, inherited]

Shortcut to make a named Cmp<Projection> comparison with the *this object automatically passed as one of the parent projections.

Definition at line 51 of file Projection.cc.

References Rivet::pcmp().

                                                                {
    return pcmp(*this, otherparent, pname);
  }
virtual std::string name ( ) const [inline, virtual, inherited]

Get the name of the projection.

Implements ProjectionApplier.

Definition at line 103 of file Projection.hh.

References Projection::_name.

Referenced by ProjectionApplier::_addProjection(), ProjectionHandler::_checkDuplicate(), ProjectionHandler::_clone(), ProjectionHandler::_getEquiv(), VetoedFinalState::addVetoOnThisFinalState(), Projection::getLog(), ProjectionHandler::registerProjection(), and Projection::setName().

                                   {
      return _name;
    }
void project ( const Event &  e) [protected, virtual]

Perform the projection operation on the supplied event.

Implements Projection.

Definition at line 8 of file DISKinematics.cc.

References DISKinematics::_breit, DISKinematics::_hcm, DISKinematics::_inHadron, DISKinematics::_theQ2, DISKinematics::_theS, DISKinematics::_theW2, DISKinematics::_theX, DISKinematics::_theY, Rivet::angle(), FourVector::azimuthalAngle(), Vector3::azimuthalAngle(), Rivet::beams(), FourMomentum::boostVector(), LorentzTransform::combine(), Rivet::dot(), DISLepton::in(), Rivet::invariant(), Rivet::PID::isHadron(), Rivet::isZero(), FourMomentum::mass2(), Vector3::mkX(), Vector3::mkY(), Vector3::mkZ(), Particle::momentum(), DISLepton::out(), Rivet::PI, FourVector::polarAngle(), LorentzTransform::preMult(), FourMomentum::px(), DISKinematics::Q2(), LorentzTransform::setBoost(), LorentzTransform::transform(), FourVector::vector3(), and DISKinematics::x().

                                            {
    // Identify beam hadron
    const ParticlePair& inc = applyProjection<Beam>(e, "Beam").beams();
    bool firstIsHadron  = PID::isHadron(inc.first.pdgId());
    bool secondIsHadron = PID::isHadron(inc.second.pdgId());
    if (firstIsHadron && !secondIsHadron) {
      _inHadron = inc.first;
    } else if (!firstIsHadron && secondIsHadron) {
      _inHadron = inc.second;
    } else {
      //help!
      throw Error("DISKinematics projector could not find the correct beam hadron");
    }

    // Get the DIS lepton and store some of its properties
    const DISLepton& dislep = applyProjection<DISLepton>(e, "Lepton");
    const FourMomentum pLepIn = dislep.in().momentum();
    const FourMomentum pLepOut = dislep.out().momentum();
    const FourMomentum pHad = _inHadron.momentum();
    const FourMomentum pGamma = pLepIn - pLepOut;
    const FourMomentum tothad = pGamma + pHad;
    _theQ2 = -pGamma.mass2();
    _theW2 = tothad.mass2();
    _theX = Q2()/(2.0 * pGamma * pHad);
    _theY = (pGamma * pHad) / (pLepIn * pHad);
    _theS = invariant(pLepIn + pHad);

    // Calculate boost vector for boost into HCM-system
    LorentzTransform tmp;
    tmp.setBoost(-tothad.boostVector());

    // Rotate so the photon is in x-z plane in HCM rest frame
    FourMomentum pGammaHCM = tmp.transform(pGamma);
    tmp.preMult(Matrix3(Vector3::mkZ(), -pGammaHCM.azimuthalAngle()));
    pGammaHCM = tmp.transform(pGamma);
    assert(isZero(dot(pGammaHCM.vector3(), Vector3::mkY())));

    // Rotate so the photon is along the positive z-axis
    const double rot_angle = pGammaHCM.polarAngle() * (pGammaHCM.px() >= 0 ? -1 : 1);
    tmp.preMult(Matrix3(Vector3::mkY(), rot_angle));
    // Check that final HCM photon lies along +ve z as expected
    pGammaHCM = tmp.transform(pGamma);
    assert(isZero(dot(pGammaHCM.vector3(), Vector3::mkX())));
    assert(isZero(dot(pGammaHCM.vector3(), Vector3::mkY())));
    assert(isZero(angle(pGammaHCM.vector3(), Vector3::mkZ())));

    // Finally rotate so outgoing lepton at phi = 0
    FourMomentum pLepOutHCM = tmp.transform(pLepOut);
    tmp.preMult(Matrix3(Vector3::mkZ(), -pLepOutHCM.azimuthalAngle()));
    assert(isZero(tmp.transform(pLepOut).azimuthalAngle()));
    _hcm = tmp;

    // Boost to Breit frame (use opposite convention for photon --- along *minus* z)
    tmp.preMult(Matrix3(Vector3::mkX(), PI));
    const double bz = 1 - 2*x();
    _breit = LorentzTransform(Vector3::mkZ() * bz).combine(tmp);
    assert(isZero(angle(_breit.transform(pGamma).vector3(), -Vector3::mkZ())));
    assert(isZero(_breit.transform(pLepOut).azimuthalAngle()));
  }
double Q2 ( ) const [inline]

The $Q^2$.

Definition at line 47 of file DISKinematics.hh.

References DISKinematics::_theQ2.

Referenced by H1_1995_S3167097::_getbin(), and DISKinematics::project().

{ return _theQ2; }
double s ( ) const [inline]

The centre of mass energy $s$.

Definition at line 59 of file DISKinematics.hh.

References DISKinematics::_theS.

{ return _theS; }
void setName ( const std::string &  name) [inline, inherited]

Used by derived classes to set their name.

Definition at line 122 of file Projection.hh.

References Projection::_name, and Projection::name().

Referenced by FastJets::_init1(), FastJets::_init2(), FastJets::_init3(), Beam::Beam(), BeamThrust::BeamThrust(), CentralEtHCM::CentralEtHCM(), ChargedFinalState::ChargedFinalState(), ChargedLeptons::ChargedLeptons(), ConstLossyFinalState::ConstLossyFinalState(), DISFinalState::DISFinalState(), DISKinematics::DISKinematics(), DISLepton::DISLepton(), DressedLeptons::DressedLeptons(), FinalState::FinalState(), FoxWolframMoments::FoxWolframMoments(), FParameter::FParameter(), HadronicFinalState::HadronicFinalState(), HeavyHadrons::HeavyHadrons(), Hemispheres::Hemispheres(), IdentifiedFinalState::IdentifiedFinalState(), InitialQuarks::InitialQuarks(), JetAlg::JetAlg(), JetShape::JetShape(), LeadingParticlesFinalState::LeadingParticlesFinalState(), LossyFinalState< ConstRandomFilter >::LossyFinalState(), MergedFinalState::MergedFinalState(), MissingMomentum::MissingMomentum(), NeutralFinalState::NeutralFinalState(), NonHadronicFinalState::NonHadronicFinalState(), ParisiTensor::ParisiTensor(), PrimaryHadrons::PrimaryHadrons(), Sphericity::Sphericity(), Spherocity::Spherocity(), Thrust::Thrust(), TriggerCDFRun0Run1::TriggerCDFRun0Run1(), TriggerCDFRun2::TriggerCDFRun2(), TriggerUA5::TriggerUA5(), UnstableFinalState::UnstableFinalState(), VetoedFinalState::VetoedFinalState(), VisibleFinalState::VisibleFinalState(), WFinder::WFinder(), and ZFinder::ZFinder().

                                        {
      _name = name;
    }
double W2 ( ) const [inline]

The $W^2$.

Definition at line 50 of file DISKinematics.hh.

References DISKinematics::_theW2.

{ return _theW2; }
double x ( ) const [inline]

The Bjorken $x$.

Definition at line 53 of file DISKinematics.hh.

References DISKinematics::_theX.

Referenced by H1_1995_S3167097::_getbin(), and DISKinematics::project().

{ return _theX; }
double y ( ) const [inline]

The Inelasticity $y$.

Definition at line 56 of file DISKinematics.hh.

References DISKinematics::_theY.

{ return _theY; }

Friends And Related Function Documentation

friend class Cmp< Projection > [friend, inherited]

The Cmp specialization for Projection is a friend.

Definition at line 37 of file Projection.hh.

friend class Event [friend, inherited]

Event is a friend.

Definition at line 34 of file Projection.hh.

Member Data Documentation

bool _allowProjReg [protected, inherited]

Flag to forbid projection registration in analyses until the init phase.

Definition at line 143 of file ProjectionApplier.hh.

Referenced by ProjectionApplier::_addProjection(), and Analysis::Analysis().

LorentzTransform _breit [private]

The LorentzRotation needed to boost a particle to the hadronic Breit frame.

Definition at line 101 of file DISKinematics.hh.

Referenced by DISKinematics::boostBreit(), and DISKinematics::project().

LorentzTransform _hcm [private]

The LorentzRotation needed to boost a particle to the hadronic CM frame.

Definition at line 98 of file DISKinematics.hh.

Referenced by DISKinematics::boostHCM(), and DISKinematics::project().

Particle _inHadron [private]

Definition at line 95 of file DISKinematics.hh.

Referenced by DISKinematics::beamHadron(), and DISKinematics::project().

double _theQ2 [private]

The $Q^2$.

Definition at line 81 of file DISKinematics.hh.

Referenced by DISKinematics::project(), and DISKinematics::Q2().

double _theS [private]

The centre of mass energy $s$.

Definition at line 93 of file DISKinematics.hh.

Referenced by DISKinematics::project(), and DISKinematics::s().

double _theW2 [private]

The $W^2$.

Definition at line 84 of file DISKinematics.hh.

Referenced by DISKinematics::project(), and DISKinematics::W2().

double _theX [private]

The Bjorken $x$.

Definition at line 87 of file DISKinematics.hh.

Referenced by DISKinematics::project(), and DISKinematics::x().

double _theY [private]

The Inelasticity $y$.

Definition at line 90 of file DISKinematics.hh.

Referenced by DISKinematics::project(), and DISKinematics::y().

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