Rivet::Hemispheres Class Referenceabstract Calculate the hemisphere masses and broadenings. More...
Inheritance diagram for Rivet::Hemispheres:
Detailed DescriptionCalculate the hemisphere masses and broadenings. Calculate the hemisphere masses and broadenings, with event hemispheres defined by the plane normal to the thrust vector, \( \vec{n}_\mathrm{T} \). The "high" hemisphere mass, \( M^2_\mathrm{high} / E^2_\mathrm{vis} \), is defined as \[ \frac{M^2_\mathrm{high}}{E^2_\mathrm{vis}} = \frac{1}{E^2_\mathrm{vis}} \max \left( \left| \sum_{\vec{p}_k \cdot \vec{n}_\mathrm{T} > 0} p_k \right|^2 , \left| \sum_{\vec{p}_k \cdot \vec{n}_\mathrm{T} < 0} p_k \right|^2 \right) \] and the corresponding "low" hemisphere mass, \( M^2_\mathrm{low} / E^2_\mathrm{vis} \), is the sum of momentum vectors in the opposite hemisphere, i.e. \( \max \rightarrow \min \) in the formula above. Finally, we define a hemisphere mass difference: \[ \frac{M^2_\mathrm{diff} }{ E^2_\mathrm{vis}} = \frac{ M^2_\mathrm{high} - M^2_\mathrm{low} }{ E^2_\mathrm{vis}} . \] Similarly to the masses, we also define hemisphere broadenings, using the momenta transverse to the thrust axis: \[ B_\pm = \frac{ \sum{\pm \vec{p}_i \cdot \vec{n}_\mathrm{T} > 0} |\vec{p}_i \times \vec{n}_\mathrm{T} | }{ 2 \sum_i | \vec{p}_i | } \] and then a set of the broadening maximum, minimum, sum and difference as follows: \[ B_\mathrm{max} = \max(B_+, B_-) \] \[ B_\mathrm{min} = \min(B_+, B_-) \] \[ B_\mathrm{sum} = B_+ + B_- \] \[ B_\mathrm{diff} = |B_+ - B_-| \] Internally, this projection uses a Thrust or Sphericity projection to determine the hemisphere orientation. Member Function Documentation◆ addPdgIdPair()
Add a colliding beam pair.
◆ applyProjection() [1/3]
template<typename PROJ = Projection>
Apply the supplied projection on event evt.
◆ applyProjection() [2/3]
template<typename PROJ = Projection>
Apply the supplied projection on event evt.
◆ applyProjection() [3/3]
template<typename PROJ = Projection>
Apply the named projection on event evt.
References Rivet::ProjectionApplier::name(). ◆ beamPairs()
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.
◆ before()
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. ◆ clone()
◆ compare()
Compare with other projections. Implements Rivet::Projection. References Rivet::Projection::mkNamedPCmp(), and Rivet::Kin::p(). ◆ declare() [1/2]
template<typename PROJ >
Register a contained projection (user-facing version)
References Rivet::ProjectionApplier::declareProjection(), and Rivet::ProjectionApplier::name(). Referenced by Rivet::CentralEtHCM::CentralEtHCM(), Rivet::CentralityEstimator::CentralityEstimator(), Rivet::ChargedLeptons::ChargedLeptons(), Rivet::ALICE::CLMultiplicity< INNER >::CLMultiplicity(), Rivet::DISDiffHadron::DISDiffHadron(), Rivet::DISFinalState::DISFinalState(), Rivet::DISKinematics::DISKinematics(), Rivet::DISLepton::DISLepton(), Rivet::GammaGammaFinalState::GammaGammaFinalState(), Rivet::GammaGammaKinematics::GammaGammaKinematics(), Rivet::GammaGammaLeptons::GammaGammaLeptons(), Rivet::GeneratedCentrality::GeneratedCentrality(), Rivet::HadronicFinalState::HadronicFinalState(), Rivet::HeavyHadrons::HeavyHadrons(), Hemispheres(), Rivet::InvisibleFinalState::InvisibleFinalState(), Rivet::LeadingParticlesFinalState::LeadingParticlesFinalState(), Rivet::LossyFinalState< FILTER >::LossyFinalState(), Rivet::MC_pPbMinBiasTrigger::MC_pPbMinBiasTrigger(), Rivet::MC_SumETFwdPbCentrality::MC_SumETFwdPbCentrality(), Rivet::ATLAS::MinBiasTrigger::MinBiasTrigger(), Rivet::MissingMomentum::MissingMomentum(), Rivet::NeutralFinalState::NeutralFinalState(), Rivet::NonHadronicFinalState::NonHadronicFinalState(), Rivet::ParisiTensor::ParisiTensor(), Rivet::PercentileProjection::PercentileProjection(), Rivet::PrimaryHadrons::PrimaryHadrons(), Rivet::SmearedJets::SmearedJets(), Rivet::SmearedMET::SmearedMET(), Rivet::SmearedParticles::SmearedParticles(), Rivet::Spherocity::Spherocity(), Rivet::ATLAS::SumET_PB_Centrality::SumET_PB_Centrality(), Rivet::ATLAS::SumET_PBPB_Centrality::SumET_PBPB_Centrality(), Rivet::TauFinder::TauFinder(), Rivet::TriggerCDFRun0Run1::TriggerCDFRun0Run1(), Rivet::TriggerCDFRun2::TriggerCDFRun2(), Rivet::UndressBeamLeptons::UndressBeamLeptons(), Rivet::ALICE::V0AndTrigger::V0AndTrigger(), Rivet::ALICE::V0Trigger< MODE >::V0Trigger(), Rivet::VetoedFinalState::VetoedFinalState(), Rivet::VisibleFinalState::VisibleFinalState(), Rivet::CentralityProjection::add(), Rivet::VetoedFinalState::addVetoOnThisFinalState(), and Rivet::CentralityBinner< T, MDist >::setProjection(). ◆ declare() [2/2]
template<typename PROJ >
Register a contained projection (user-facing, arg-reordered version)
References Rivet::ProjectionApplier::declareProjection(), and Rivet::ProjectionApplier::name(). ◆ declareProjection()
template<typename PROJ >
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
References Rivet::ProjectionApplier::name(). Referenced by Rivet::ProjectionApplier::declare(). ◆ get()
template<typename PROJ >
Get the named projection, specifying return type via a template argument (user-facing alias).
References Rivet::ProjectionApplier::name(). ◆ getProjection() [1/2]
template<typename PROJ >
Get the named projection, specifying return type via a template argument.
References Rivet::ProjectionHandler::getProjection(), Rivet::ProjectionApplier::getProjHandler(), Rivet::ProjectionApplier::name(), and Rivet::Kin::p(). Referenced by Rivet::CentralityProjection::compare(), and Rivet::pcmp(). ◆ getProjection() [2/2]
Get the named projection (non-templated, so returns as a reference to a Projection base class). References Rivet::ProjectionHandler::getProjection(), Rivet::ProjectionApplier::getProjHandler(), and Rivet::ProjectionApplier::name(). ◆ mkNamedPCmp()
Shortcut to make a named Cmp<Projection> comparison with the Referenced by Rivet::MC_SumETFwdPbCentrality::compare(), Rivet::MC_pPbMinBiasTrigger::compare(), Rivet::BeamThrust::compare(), Rivet::CentralEtHCM::compare(), Rivet::DISFinalState::compare(), Rivet::EventMixingBase::compare(), Rivet::FParameter::compare(), Rivet::GammaGammaFinalState::compare(), Rivet::HeavyHadrons::compare(), compare(), Rivet::LossyFinalState< FILTER >::compare(), Rivet::PercentileProjection::compare(), Rivet::Spherocity::compare(), Rivet::Thrust::compare(), Rivet::ATLAS::SumET_PB_Centrality::compare(), Rivet::ATLAS::SumET_PBPB_Centrality::compare(), Rivet::ATLAS::MinBiasTrigger::compare(), Rivet::CentralityEstimator::compare(), Rivet::GeneratedCentrality::compare(), Rivet::STAR_BES_Centrality::compare(), and Rivet::BRAHMSCentrality::compare(). ◆ mkPCmp()
Shortcut to make a named Cmp<Projection> comparison with the
Referenced by Rivet::ALICE::PrimaryParticles::compare(), Rivet::SmearedJets::compare(), Rivet::SmearedMET::compare(), Rivet::SmearedParticles::compare(), and Rivet::Correlators::compare(). ◆ name()
Get the name of the projection. Implements Rivet::ProjectionApplier. Referenced by Rivet::VetoedFinalState::addVetoOnThisFinalState(), Rivet::Projection::getLog(), and Rivet::Projection::setName(). ◆ project()
Perform the projection on the Event. Implements Rivet::Projection. The documentation for this class was generated from the following file:
Generated on Fri May 13 2022 23:02:06 for Rivet by  1.9.4
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