class Rivet::MissingMomentum

Rivet::MissingMomentum #

Calculate missing ( E ), ( E_\perp ) etc. as complements to the total visible momentum. More…

#include <MissingMomentum.hh>

Inherits from Rivet::METFinder, Rivet::Projection, Rivet::ProjectionApplier

Public Functions ##

Protected Functions ##

Additional inherited members ##

Public Functions inherited from Rivet::Projection

Protected Functions inherited from Rivet::Projection

Friends inherited from Rivet::Projection

Public Functions inherited from Rivet::ProjectionApplier

Detailed Description ##

class Rivet::MissingMomentum;

Calculate missing ( E ), ( E_\perp ) etc. as complements to the total visible momentum.

Project out the total visible energy vector, allowing missing ( E ), ( E_\perp ) etc. to be calculated. Final-state particle visibility restrictions are automatic, and the resulting visible/missing momentum vectors are over the whole event rather than over hard objects (jets + leptons) or specific to prompt invisibles.

Public Functions Documentation ##

function visibleMomentum ##

const FourMomentum visibleMomentum(
    double mass =0 *GeV
) const

The vector-summed visible four-momentum in the event.

Note:

• Reverse this vector with .reverse() to get the missing momentum vector.
• The optional mass argument is used to set a mass on the 4-vector. By default it is zero (since missing momentum is really a 3-momentum quantity: adding the E components of visible momenta just gives a huge mass)

Todo: Change to return a 3-vector with no argument, a 4-vector if a mass arg given

function visibleMom ##

inline const FourMomentum visibleMom(
    double mass =0 *GeV
) const

Alias for visibleMomentum.

function missingMomentum ##

inline const FourMomentum missingMomentum(
    double mass =0 *GeV
) const

The missing four-momentum in the event, required to balance the final state.

Note: The optional mass argument is used to set a mass on the 4-vector. By default it is zero (since missing momentum is really a 3-momentum quantity: adding the E components of visible momenta just gives a huge mass)

Todo: Change to return a 3-vector with no argument, a 4-vector if a mass arg given

function missingMom ##

inline const FourMomentum missingMom(
    double mass =0 *GeV
) const

Alias for missingMomentum.

function vectorPt ##

inline virtual const ThreeMomentum & vectorPt() const

The vector-summed visible transverse momentum in the event, as a 3-vector with z=0.

Note: Reverse this vector with operator- to get the missing pT vector.

Reimplements: Rivet::METFinder::vectorPt

function vectorPtMiss ##

inline const ThreeMomentum vectorPtMiss() const

The vector missing transverse momentum in the event, as a 3-vector with z=0.

function scalarPtMiss ##

inline double scalarPtMiss() const

The scalar value of missing transverse momentum in the event.

function scalarPt ##

inline double scalarPt() const

The scalar-summed visible transverse momentum in the event.

function vectorEt ##

inline virtual const Vector3 & vectorEt() const

The vector-summed visible transverse energy in the event, as a 3-vector with z=0.

Note: Reverse this vector with operator- to get the missing ET vector.

Reimplements: Rivet::METFinder::vectorEt

function vectorEtMiss ##

inline const Vector3 vectorEtMiss() const

The vector missing transverse energy in the event, as a 3-vector with z=0.

function scalarEtMiss ##

inline double scalarEtMiss() const

The scalar value of missing transverse energy in the event.

function scalarEt ##

inline double scalarEt() const

The scalar-summed visible transverse energy in the event.

function set ##

inline double set() const

Deprecated:

Use the full name, “set” is too ambiguous

Alias for scalarEt

function vectorMissingPt ##

inline const Vector3 vectorMissingPt() const

Convenience vector MPT function.

function vectorMPT ##

inline const Vector3 vectorMPT() const

function missingPt ##

inline double missingPt() const

The vector-summed missing transverse momentum in the event.

function vectorMissingEt ##

inline const Vector3 vectorMissingEt() const

Convenience vector MET function.

function vectorMET ##

inline const Vector3 vectorMET() const

function missingEt ##

inline double missingEt() const

The vector-summed missing transverse energy in the event.

function met ##

inline double met() const

Alias for missingEt.

function clone ##

virtual unique_ptr< Projection > clone() const =0

Clone on the heap.

Reimplemented by: Rivet::ALICE::V0Multiplicity::clone, Rivet::ALICE::CLMultiplicity::clone, Rivet::ALICE::V0Trigger::clone, Rivet::ALICE::V0AndTrigger::clone, Rivet::ALICE::PrimaryParticles::clone, Rivet::AxesDefinition::clone, Rivet::FastJets::clone, Rivet::ChargedFinalState::clone

function name ##

inline virtual std::string name() const

Get the name of the projection.

Reimplements: Rivet::ProjectionApplier::name

function valid ##

inline bool valid() const

Get the state of the projetion.

function failed ##

inline bool failed() const

Get the state of the projetion.

function before ##

bool before(
    const Projection & p
) const

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.

function beamPairs ##

virtual const std::set< PdgIdPair > beamPairs() const

Todo: Remove the beam constraints system from projections.

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.

function addPdgIdPair ##

inline Projection & addPdgIdPair(
    PdgId beam1,
    PdgId beam2
)

Todo: This deserves a better name!

Add a colliding beam pair.

function getProjections ##

inline std::set< ConstProjectionPtr > getProjections() const

Get the contained projections, including recursion.

function hasProjection ##

inline bool hasProjection(
    const std::string & name
) const

Does this applier have a projection registered under the name name?

function getProjection ##

template <typename PROJ >
inline const PROJ & getProjection(
    const std::string & name
) const

Todo: Add SFINAE to require that PROJ inherit from Projection

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

function getProjection ##

inline const Projection & getProjection(
    const std::string & name
) const

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

function get ##

template <typename PROJ >
inline const PROJ & get(
    const std::string & name
) const

Todo: Add SFINAE to require that PROJ inherit from Projection

Get the named projection, specifying return type via a template argument (user-facing alias).

function applyProjection ##

template <typename PROJ  =Projection>
inline std::enable_if_t< std::is_base_of< Projection, PROJ >::value, const PROJ & > applyProjection(
    const Event & evt,
    const Projection & proj
) const

Deprecated:

Prefer the simpler apply<> form

Apply the supplied projection on event evt.

function applyProjection ##

template <typename PROJ  =Projection>
inline std::enable_if_t< std::is_base_of< Projection, PROJ >::value, const PROJ & > applyProjection(
    const Event & evt,
    const PROJ & proj
) const

Deprecated:

Prefer the simpler apply<> form

Apply the supplied projection on event evt.

function applyProjection ##

template <typename PROJ  =Projection>
inline std::enable_if_t< std::is_base_of< Projection, PROJ >::value, const PROJ & > applyProjection(
    const Event & evt,
    const std::string & name
) const

Deprecated:

Prefer the simpler apply<> form

Apply the named projection on event evt.

function apply ##

template <typename PROJ  =Projection>
inline std::enable_if_t< std::is_base_of< Projection, PROJ >::value, const PROJ & > apply(
    const Event & evt,
    const Projection & proj
) const

Apply the supplied projection on event evt (user-facing alias).

function apply ##

template <typename PROJ  =Projection>
inline std::enable_if_t< std::is_base_of< Projection, PROJ >::value, const PROJ & > apply(
    const Event & evt,
    const PROJ & proj
) const

Apply the supplied projection on event evt (user-facing alias).

function apply ##

template <typename PROJ  =Projection>
inline std::enable_if_t< std::is_base_of< Projection, PROJ >::value, const PROJ & > apply(
    const Event & evt,
    const std::string & name
) const

Apply the supplied projection on event evt (user-facing alias).

function apply ##

template <typename PROJ  =Projection>
inline std::enable_if_t< std::is_base_of< Projection, PROJ >::value, const PROJ & > apply(
    const std::string & name,
    const Event & evt
) const

Apply the supplied projection on event evt (convenience arg-reordering alias).

function markAsOwned ##

inline void markAsOwned() const

Mark this object as owned by a proj-handler.

function MissingMomentum ##

inline MissingMomentum(
    const FinalState & fs
)

Canonical constructor taking a FinalState as argument.

function MissingMomentum ##

inline MissingMomentum(
    const Cut & c =Cuts::open()
)

Default constructor with optional cut.

function DEFAULT_RIVET_PROJ_CLONE ##

DEFAULT_RIVET_PROJ_CLONE(
    MissingMomentum 
)

Clone on the heap.

function clear ##

void clear()

Clear the projection results.

function reset ##

inline virtual void reset()

Reset the projection. Smearing functions will be unchanged.

Reimplemented by: Rivet::SmearedMET::reset

Protected Functions Documentation ##

function getLog ##

inline Log & getLog() const

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

function setName ##

inline void setName(
    const std::string & name
)

Used by derived classes to set their name.

function fail ##

inline void fail()

Set the projection in an unvalid state.

function mkNamedPCmp ##

Cmp< Projection > mkNamedPCmp(
    const Projection & otherparent,
    const std::string & pname
) const

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

function mkPCmp ##

Cmp< Projection > mkPCmp(
    const Projection & otherparent,
    const std::string & pname
) const

Note: Alias for mkNamedPCmp

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

function getProjHandler ##

inline ProjectionHandler & getProjHandler() const

Get a reference to the ProjectionHandler for this thread.

function declareProjection ##

template <typename PROJ >
inline const PROJ & declareProjection(
    const PROJ & proj,
    const std::string & name
)

Register a contained projection.

Todo: Add SFINAE to require that PROJ inherit from 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.

function declare ##

template <typename PROJ >
inline const PROJ & declare(
    const PROJ & proj,
    const std::string & name
)

Register a contained projection (user-facing version)

Todo: Add SFINAE to require that PROJ inherit from Projection

function declare ##

template <typename PROJ >
inline const PROJ & declare(
    const std::string & name,
    const PROJ & proj
)

Register a contained projection (user-facing, arg-reordered version)

Todo: Add SFINAE to require that PROJ inherit from Projection

function project ##

virtual void project(
    const Event & e
)

Apply the projection to the event.

Reimplements: Rivet::AxesDefinition::project

function compare ##

virtual CmpState compare(
    const Projection & p
) const

Compare projections.

Reimplements: Rivet::AxesDefinition::compare

Updated on 2022-08-07 at 20:17:17 +0100