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FastJet 3.0.2
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FastJet 3.0.2
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Class to contain pseudojets, including minimal information of use to jet-clustering routines. More...
#include <fastjet/PseudoJet.hh>
Inherited by fastjet::ClusterSequenceActiveArea::GhostJet.
Classes | |
| class | InexistentUserInfo |
| error class to be thrown if accessing user info when it doesn't exist More... | |
| class | UserInfoBase |
| a base class to hold extra user information in a PseudoJet More... | |
Public Types | |
| enum | { X = 0, Y = 1, Z = 2, T = 3, NUM_COORDINATES = 4, SIZE = NUM_COORDINATES } |
Public Member Functions | |
| template<> | |
| PseudoJet (const siscone::Cmomentum &four_vector) | |
| shortcut for converting siscone Cmomentum into PseudoJet | |
| template<> | |
| PseudoJet (const siscone_spherical::CSphmomentum &four_vector) | |
| shortcut for converting siscone CSphmomentum into PseudoJet | |
Constructors and destructor | |
| PseudoJet () | |
| default constructor, which as of FJ3.0 provides an object for which all operations are now valid and which has zero momentum | |
| PseudoJet (const double px, const double py, const double pz, const double E) | |
| construct a pseudojet from explicit components | |
| template<class L > | |
| PseudoJet (const L &some_four_vector) | |
| constructor from any object that has px,py,pz,E = some_four_vector[0--3], | |
| PseudoJet (bool) | |
| virtual | ~PseudoJet () |
| default (virtual) destructor | |
Kinematic access functions | |
| double | E () const |
| double | e () const |
| double | px () const |
| double | py () const |
| double | pz () const |
| double | phi () const |
| returns phi (in the range 0..2pi) | |
| double | phi_std () const |
| returns phi in the range -pi..pi | |
| double | phi_02pi () const |
| returns phi in the range 0..2pi | |
| double | rap () const |
| returns the rapidity or some large value when the rapidity is infinite | |
| double | rapidity () const |
| the same as rap() | |
| double | pseudorapidity () const |
| returns the pseudo-rapidity or some large value when the rapidity is infinite | |
| double | eta () const |
| double | pt2 () const |
| returns the squared transverse momentum | |
| double | pt () const |
| returns the scalar transverse momentum | |
| double | perp2 () const |
| returns the squared transverse momentum | |
| double | perp () const |
| returns the scalar transverse momentum | |
| double | kt2 () const |
| returns the squared transverse momentum | |
| double | m2 () const |
| returns the squared invariant mass // like CLHEP | |
| double | m () const |
| returns the invariant mass (If m2() is negative then -sqrt(-m2()) is returned, as in CLHEP) | |
| double | mperp2 () const |
| returns the squared transverse mass = kt^2+m^2 | |
| double | mperp () const |
| returns the transverse mass = sqrt(kt^2+m^2) | |
| double | mt2 () const |
| returns the squared transverse mass = kt^2+m^2 | |
| double | mt () const |
| returns the transverse mass = sqrt(kt^2+m^2) | |
| double | modp2 () const |
| return the squared 3-vector modulus = px^2+py^2+pz^2 | |
| double | modp () const |
| return the 3-vector modulus = sqrt(px^2+py^2+pz^2) | |
| double | Et () const |
| return the transverse energy | |
| double | Et2 () const |
| return the transverse energy squared | |
| double | operator() (int i) const |
| returns component i, where X==0, Y==1, Z==2, E==3 | |
| double | operator[] (int i) const |
| returns component i, where X==0, Y==1, Z==2, E==3 | |
| double | kt_distance (const PseudoJet &other) const |
| returns kt distance (R=1) between this jet and another | |
| double | plain_distance (const PseudoJet &other) const |
| returns squared cylinder (rap-phi) distance between this jet and another | |
| double | squared_distance (const PseudoJet &other) const |
| returns squared cylinder (rap-phi) distance between this jet and another | |
| double | delta_R (const PseudoJet &other) const |
return the cylinder (rap-phi) distance between this jet and another,  . | |
| double | delta_phi_to (const PseudoJet &other) const |
| returns other.phi() - this.phi(), constrained to be in range -pi . | |
| double | beam_distance () const |
| returns distance between this jet and the beam | |
| std::valarray< double > | four_mom () const |
| return a valarray containing the four-momentum (components 0-2 are 3-mom, component 3 is energy). | |
Kinematic modification functions | |
| PseudoJet & | boost (const PseudoJet &prest) |
| transform this jet (given in the rest frame of prest) into a jet in the lab frame [NOT FULLY TESTED] | |
| PseudoJet & | unboost (const PseudoJet &prest) |
| transform this jet (given in lab) into a jet in the rest frame of prest [NOT FULLY TESTED] | |
| void | operator*= (double) |
| multiply the jet's momentum by the coefficient | |
| void | operator/= (double) |
| divide the jet's momentum by the coefficient | |
| void | operator+= (const PseudoJet &) |
| add the other jet's momentum to this jet | |
| void | operator-= (const PseudoJet &) |
| subtract the other jet's momentum from this jet | |
| void | reset (double px, double py, double pz, double E) |
| reset the 4-momentum according to the supplied components and put the user and history indices back to their default values | |
| void | reset (const PseudoJet &psjet) |
| reset the PseudoJet to be equal to psjet (including its indices); NB if the argument is derived from a PseudoJet then the "reset" used will be the templated version | |
| template<class L > | |
| void | reset (const L &some_four_vector) |
| reset the 4-momentum according to the supplied generic 4-vector (accessible via indexing, [0]==px,...[3]==E) and put the user and history indices back to their default values. | |
| void | reset_PtYPhiM (double pt_in, double y_in, double phi_in, double m_in=0.0) |
| reset the PseudoJet according to the specified pt, rapidity, azimuth and mass (also resetting indices, etc.) (phi should satisfy -2pi<phi<4pi) | |
| void | reset_momentum (double px, double py, double pz, double E) |
| reset the 4-momentum according to the supplied components but leave all other information (indices, user info, etc.) untouched | |
| void | reset_momentum (const PseudoJet &pj) |
| reset the 4-momentum according to the components of the supplied PseudoJet, including cached components; note that the template version (below) will be called for classes derived from PJ. | |
| void | reset_momentum_PtYPhiM (double pt, double y, double phi, double m=0.0) |
| reset the 4-momentum according to the specified pt, rapidity, azimuth and mass (phi should satisfy -2pi<phi<4pi) | |
| template<class L > | |
| void | reset_momentum (const L &some_four_vector) |
| reset the 4-momentum according to the supplied generic 4-vector (accessible via indexing, [0]==px,...[3]==E), but leave all other information (indices, user info, etc.) untouched | |
| void | set_cached_rap_phi (double rap, double phi) |
| in some cases when setting a 4-momentum, the user/program knows what rapidity and azimuth are associated with that 4-momentum; by calling this routine the user can provide the information directly to the PseudoJet and avoid expensive rap-phi recalculations. | |
User index functions | |
To allow the user to set and access an integer index which can be exploited by the user to associate extra information with a particle/jet (for example pdg id, or an indication of a particle's origin within the user's analysis) | |
| int | user_index () const |
| return the user_index, | |
| void | set_user_index (const int index) |
| set the user_index, intended to allow the user to add simple identifying information to a particle/jet | |
User information types and functions | |
Allows PseudoJet to carry extra user info (as an object derived from UserInfoBase). | |
| void | set_user_info (UserInfoBase *user_info_in) |
| sets the internal shared pointer to the user information. | |
| template<class L > | |
| const L & | user_info () const |
| returns a reference to the dynamic cast conversion of user_info to type L. | |
| bool | has_user_info () const |
| returns true if the PseudoJet has user information | |
| template<class L > | |
| bool | has_user_info () const |
| returns true if the PseudoJet has user information than can be cast to the template argument type. | |
| const UserInfoBase * | user_info_ptr () const |
| retrieve a pointer to the (const) user information | |
| const SharedPtr< UserInfoBase > & | user_info_shared_ptr () const |
| retrieve a (const) shared pointer to the user information | |
| SharedPtr< UserInfoBase > & | user_info_shared_ptr () |
| retrieve a (non-const) shared pointer to the user information; you can use this, for example, to set the shared pointer, eg | |
Description | |
| std::string | description () const |
| return a string describing what kind of PseudoJet we are dealing with | |
Access to the associated ClusterSequence object. | |
In addition to having kinematic information, jets may contain a reference to an associated ClusterSequence (this is the case, for example, if the jet has been returned by a ClusterSequence member function). | |
| bool | has_associated_cluster_sequence () const |
| returns true if this PseudoJet has an associated ClusterSequence. | |
| bool | has_associated_cs () const |
| shorthand for has_associated_cluster_sequence() | |
| bool | has_valid_cluster_sequence () const |
| returns true if this PseudoJet has an associated and still valid(ated) ClusterSequence. | |
| bool | has_valid_cs () const |
| shorthand for has_valid_cluster_sequence() | |
| const ClusterSequence * | associated_cluster_sequence () const |
| get a (const) pointer to the parent ClusterSequence (NULL if inexistent) | |
| const ClusterSequence * | associated_cs () const |
| const ClusterSequence * | validated_cluster_sequence () const |
| if the jet has a valid associated cluster sequence then return a pointer to it; otherwise throw an error | |
| const ClusterSequence * | validated_cs () const |
| shorthand for validated_cluster_sequence() | |
| const ClusterSequenceAreaBase * | validated_cluster_sequence_area_base () const |
| if the jet has valid area information then return a pointer to the associated ClusterSequenceAreaBase object; otherwise throw an error | |
| const ClusterSequenceAreaBase * | validated_csab () const |
| shorthand for validated_cluster_sequence_area_base() | |
Access to the associated PseudoJetStructureBase object. | |
In addition to having kinematic information, jets may contain a reference to an associated ClusterSequence (this is the case, for example, if the jet has been returned by a ClusterSequence member function). | |
| void | set_structure_shared_ptr (const SharedPtr< PseudoJetStructureBase > &structure) |
| set the associated structure | |
| bool | has_structure () const |
| return true if there is some structure associated with this PseudoJet | |
| const PseudoJetStructureBase * | structure_ptr () const |
| return a pointer to the structure (of type PseudoJetStructureBase*) associated with this PseudoJet. | |
| PseudoJetStructureBase * | structure_non_const_ptr () |
| return a non-const pointer to the structure (of type PseudoJetStructureBase*) associated with this PseudoJet. | |
| const PseudoJetStructureBase * | validated_structure_ptr () const |
| return a pointer to the structure (of type PseudoJetStructureBase*) associated with this PseudoJet. | |
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const SharedPtr < PseudoJetStructureBase > & | structure_shared_ptr () const |
| return a reference to the shared pointer to the PseudoJetStructureBase associated with this PseudoJet | |
| template<typename StructureType > | |
| const StructureType & | structure () const |
| returns a reference to the structure casted to the requested structure type | |
| template<typename TransformerType > | |
| bool | has_structure_of () const |
| check if the PseudoJet has the structure resulting from a Transformer (that is, its structure is compatible with a Transformer::StructureType). | |
| template<typename TransformerType > | |
| const TransformerType::StructureType & | structure_of () const |
| this is a helper to access any structure created by a Transformer (that is, of type Transformer::StructureType). | |
Methods for access to information about jet structure | |
These allow access to jet constituents, and other jet subtructure information. They only work if the jet is associated with a ClusterSequence. | |
| virtual bool | has_partner (PseudoJet &partner) const |
| check if it has been recombined with another PseudoJet in which case, return its partner through the argument. | |
| virtual bool | has_child (PseudoJet &child) const |
| check if it has been recombined with another PseudoJet in which case, return its child through the argument. | |
| virtual bool | has_parents (PseudoJet &parent1, PseudoJet &parent2) const |
| check if it is the product of a recombination, in which case return the 2 parents through the 'parent1' and 'parent2' arguments. | |
| virtual bool | contains (const PseudoJet &constituent) const |
| check if the current PseudoJet contains the one passed as argument. | |
| virtual bool | is_inside (const PseudoJet &jet) const |
| check if the current PseudoJet is contained the one passed as argument. | |
| virtual bool | has_constituents () const |
| returns true if the PseudoJet has constituents | |
| virtual std::vector< PseudoJet > | constituents () const |
| retrieve the constituents. | |
| virtual bool | has_exclusive_subjets () const |
| returns true if the PseudoJet has support for exclusive subjets | |
| std::vector< PseudoJet > | exclusive_subjets (const double &dcut) const |
| return a vector of all subjets of the current jet (in the sense of the exclusive algorithm) that would be obtained when running the algorithm with the given dcut. | |
| int | n_exclusive_subjets (const double &dcut) const |
| return the size of exclusive_subjets(...); still n ln n with same coefficient, but marginally more efficient than manually taking exclusive_subjets.size() | |
| std::vector< PseudoJet > | exclusive_subjets (int nsub) const |
| return the list of subjets obtained by unclustering the supplied jet down to nsub subjets. | |
| std::vector< PseudoJet > | exclusive_subjets_up_to (int nsub) const |
| return the list of subjets obtained by unclustering the supplied jet down to nsub subjets (or all constituents if there are fewer than nsub). | |
| double | exclusive_subdmerge (int nsub) const |
| return the dij that was present in the merging nsub+1 -> nsub subjets inside this jet. | |
| double | exclusive_subdmerge_max (int nsub) const |
| return the maximum dij that occurred in the whole event at the stage that the nsub+1 -> nsub merge of subjets occurred inside this jet. | |
| virtual bool | has_pieces () const |
| returns true if a jet has pieces | |
| virtual std::vector< PseudoJet > | pieces () const |
| retrieve the pieces that make up the jet. | |
| virtual bool | has_area () const |
| check if it has a defined area | |
| virtual double | area () const |
| return the jet (scalar) area. | |
| virtual double | area_error () const |
| return the error (uncertainty) associated with the determination of the area of this jet. | |
| virtual PseudoJet | area_4vector () const |
| return the jet 4-vector area. | |
| virtual bool | is_pure_ghost () const |
| true if this jet is made exclusively of ghosts. | |
Members mainly intended for internal use | |
| int | cluster_hist_index () const |
| return the cluster_hist_index, intended to be used by clustering routines. | |
| void | set_cluster_hist_index (const int index) |
| set the cluster_hist_index, intended to be used by clustering routines. | |
| int | cluster_sequence_history_index () const |
| alternative name for cluster_hist_index() [perhaps more meaningful] | |
| void | set_cluster_sequence_history_index (const int index) |
| alternative name for set_cluster_hist_index(...) [perhaps more meaningful] | |
Protected Attributes | |
| SharedPtr< PseudoJetStructureBase > | _structure |
| SharedPtr< UserInfoBase > | _user_info |
Class to contain pseudojets, including minimal information of use to jet-clustering routines.
Definition at line 62 of file PseudoJet.hh.
| double fastjet::PseudoJet::delta_R | ( | const PseudoJet & | other | ) | const [inline] |
return the cylinder (rap-phi) distance between this jet and another, .
Definition at line 185 of file PseudoJet.hh.
| double fastjet::PseudoJet::delta_phi_to | ( | const PseudoJet & | other | ) | const |
returns other.phi() - this.phi(), constrained to be in range -pi .
returns other.phi() - this.phi(), i.e.
. pi
the phi distance to other, constrained to be in range -pi .. pi
Definition at line 377 of file PseudoJet.cc.
| valarray< double > fastjet::PseudoJet::four_mom | ( | ) | const |
return a valarray containing the four-momentum (components 0-2 are 3-mom, component 3 is energy).
Definition at line 104 of file PseudoJet.cc.
transform this jet (given in the rest frame of prest) into a jet in the lab frame [NOT FULLY TESTED]
transform this jet (given in lab) into a jet in the rest frame of prest
Definition at line 258 of file PseudoJet.cc.
transform this jet (given in lab) into a jet in the rest frame of prest [NOT FULLY TESTED]
transform this jet (given in the rest frame of prest) into a jet in the lab frame;
Definition at line 285 of file PseudoJet.cc.
| void fastjet::PseudoJet::reset | ( | const PseudoJet & | psjet | ) | [inline] |
reset the PseudoJet to be equal to psjet (including its indices); NB if the argument is derived from a PseudoJet then the "reset" used will be the templated version
Note: this is included on top of the templated version because PseudoJet is not "derived" from PseudoJet, so the templated reset would not handle this case properly.
Definition at line 238 of file PseudoJet.hh.
| void fastjet::PseudoJet::reset | ( | const L & | some_four_vector | ) | [inline] |
reset the 4-momentum according to the supplied generic 4-vector (accessible via indexing, [0]==px,...[3]==E) and put the user and history indices back to their default values.
Definition at line 245 of file PseudoJet.hh.
| void fastjet::PseudoJet::reset_momentum | ( | const PseudoJet & | pj | ) | [inline] |
reset the 4-momentum according to the components of the supplied PseudoJet, including cached components; note that the template version (below) will be called for classes derived from PJ.
Definition at line 919 of file PseudoJet.hh.
| void fastjet::PseudoJet::set_cached_rap_phi | ( | double | rap, |
| double | phi | ||
| ) |
in some cases when setting a 4-momentum, the user/program knows what rapidity and azimuth are associated with that 4-momentum; by calling this routine the user can provide the information directly to the PseudoJet and avoid expensive rap-phi recalculations.
| rap | rapidity |
| phi | (in range -twopi...4*pi) |
Definition at line 316 of file PseudoJet.cc.
| void fastjet::PseudoJet::set_user_info | ( | UserInfoBase * | user_info_in | ) | [inline] |
sets the internal shared pointer to the user information.
Note that the PseudoJet will now _own_ the pointer, and delete the corresponding object when it (the jet, and any copies of the jet) goes out of scope.
Definition at line 377 of file PseudoJet.hh.
| const L& fastjet::PseudoJet::user_info | ( | ) | const [inline] |
returns a reference to the dynamic cast conversion of user_info to type L.
Usage: suppose you have previously set the user info with a pointer to an object of type MyInfo,
class MyInfo: public PseudoJet::UserInfoBase { MyInfo(int id) : _pdg_id(id); int pdg_id() const {return _pdg_id;} int _pdg_id; };
PseudoJet particle(...); particle.set_user_info(new MyInfo(its_pdg_id));
Then you would access that pdg_id() as
particle.user_info<MyInfo>().pdg_id();
It's overkill for just a single integer, but scales easily to more extensive information.
Note that user_info() throws an InexistentUserInfo() error if there is no user info; throws a std::bad_cast if the conversion doesn't work
If this behaviour does not fit your needs, use instead the the user_info_ptr() or user_info_shared_ptr() member functions.
Definition at line 410 of file PseudoJet.hh.
| bool fastjet::PseudoJet::has_user_info | ( | ) | const [inline] |
returns true if the PseudoJet has user information than can be cast to the template argument type.
Definition at line 423 of file PseudoJet.hh.
| SharedPtr<UserInfoBase>& fastjet::PseudoJet::user_info_shared_ptr | ( | ) | [inline] |
retrieve a (non-const) shared pointer to the user information; you can use this, for example, to set the shared pointer, eg
p2.user_info_shared_ptr() = p1.user_info_shared_ptr();
or
SharedPtr<PseudoJet::UserInfoBase> info_shared(new MyInfo(...));
p2.user_info_shared_ptr() = info_shared;
Definition at line 452 of file PseudoJet.hh.
| bool fastjet::PseudoJet::has_valid_cluster_sequence | ( | ) | const |
returns true if this PseudoJet has an associated and still valid(ated) ClusterSequence.
Definition at line 423 of file PseudoJet.cc.
| const PseudoJetStructureBase * fastjet::PseudoJet::structure_ptr | ( | ) | const |
return a pointer to the structure (of type PseudoJetStructureBase*) associated with this PseudoJet.
return NULL if there is no associated structure
Definition at line 455 of file PseudoJet.cc.
| PseudoJetStructureBase * fastjet::PseudoJet::structure_non_const_ptr | ( | ) |
return a non-const pointer to the structure (of type PseudoJetStructureBase*) associated with this PseudoJet.
return NULL if there is no associated structure
Only use this if you know what you are doing. In any case, prefer the 'structure_ptr()' (the const version) to this method, unless you really need a write access to the PseudoJet's underlying structure.
Definition at line 470 of file PseudoJet.cc.
| const PseudoJetStructureBase * fastjet::PseudoJet::validated_structure_ptr | ( | ) | const |
return a pointer to the structure (of type PseudoJetStructureBase*) associated with this PseudoJet.
throw an error if there is no associated structure
Definition at line 480 of file PseudoJet.cc.
| const StructureType & fastjet::PseudoJet::structure | ( | ) | const |
returns a reference to the structure casted to the requested structure type
If there is no sructure associated, an Error is thrown. If the type is not met, a std::bad_cast error is thrown.
Definition at line 939 of file PseudoJet.hh.
| bool fastjet::PseudoJet::has_structure_of | ( | ) | const |
check if the PseudoJet has the structure resulting from a Transformer (that is, its structure is compatible with a Transformer::StructureType).
If there is no structure, false is returned.
Definition at line 947 of file PseudoJet.hh.
| const TransformerType::StructureType & fastjet::PseudoJet::structure_of | ( | ) | const |
this is a helper to access any structure created by a Transformer (that is, of type Transformer::StructureType).
If there is no structure, or if the structure is not compatible with TransformerType, an error is thrown.
Definition at line 957 of file PseudoJet.hh.
| bool fastjet::PseudoJet::has_partner | ( | PseudoJet & | partner | ) | const [virtual] |
check if it has been recombined with another PseudoJet in which case, return its partner through the argument.
Otherwise, 'partner' is set to 0.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 501 of file PseudoJet.cc.
| bool fastjet::PseudoJet::has_child | ( | PseudoJet & | child | ) | const [virtual] |
check if it has been recombined with another PseudoJet in which case, return its child through the argument.
Otherwise, 'child' is set to 0.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 512 of file PseudoJet.cc.
check if it is the product of a recombination, in which case return the 2 parents through the 'parent1' and 'parent2' arguments.
Otherwise, set these to 0.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 523 of file PseudoJet.cc.
| bool fastjet::PseudoJet::contains | ( | const PseudoJet & | constituent | ) | const [virtual] |
check if the current PseudoJet contains the one passed as argument.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 533 of file PseudoJet.cc.
| bool fastjet::PseudoJet::is_inside | ( | const PseudoJet & | jet | ) | const [virtual] |
check if the current PseudoJet is contained the one passed as argument.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 543 of file PseudoJet.cc.
| vector< PseudoJet > fastjet::PseudoJet::constituents | ( | ) | const [virtual] |
retrieve the constituents.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence or other substructure information
Definition at line 556 of file PseudoJet.cc.
| std::vector< PseudoJet > fastjet::PseudoJet::exclusive_subjets | ( | const double & | dcut | ) | const |
return a vector of all subjets of the current jet (in the sense of the exclusive algorithm) that would be obtained when running the algorithm with the given dcut.
Time taken is O(m ln m), where m is the number of subjets that are found. If m gets to be of order of the total number of constituents in the jet, this could be substantially slower than just getting that list of constituents.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 579 of file PseudoJet.cc.
| int fastjet::PseudoJet::n_exclusive_subjets | ( | const double & | dcut | ) | const |
return the size of exclusive_subjets(...); still n ln n with same coefficient, but marginally more efficient than manually taking exclusive_subjets.size()
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 590 of file PseudoJet.cc.
| std::vector< PseudoJet > fastjet::PseudoJet::exclusive_subjets | ( | int | nsub | ) | const |
return the list of subjets obtained by unclustering the supplied jet down to nsub subjets.
Throws an error if there are fewer than nsub particles in the jet.
For ClusterSequence type jets, requires nsub ln nsub time
An Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 610 of file PseudoJet.cc.
| std::vector< PseudoJet > fastjet::PseudoJet::exclusive_subjets_up_to | ( | int | nsub | ) | const |
return the list of subjets obtained by unclustering the supplied jet down to nsub subjets (or all constituents if there are fewer than nsub).
For ClusterSequence type jets, requires nsub ln nsub time
An Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 603 of file PseudoJet.cc.
| double fastjet::PseudoJet::exclusive_subdmerge | ( | int | nsub | ) | const |
return the dij that was present in the merging nsub+1 -> nsub subjets inside this jet.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 627 of file PseudoJet.cc.
| double fastjet::PseudoJet::exclusive_subdmerge_max | ( | int | nsub | ) | const |
return the maximum dij that occurred in the whole event at the stage that the nsub+1 -> nsub merge of subjets occurred inside this jet.
an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence
Definition at line 638 of file PseudoJet.cc.
| bool fastjet::PseudoJet::has_pieces | ( | ) | const [virtual] |
returns true if a jet has pieces
By default a single particle or a jet coming from a ClusterSequence have no pieces and this methos will return false.
In practice, this is equivalent to have an structure of type CompositeJetStructure.
Definition at line 647 of file PseudoJet.cc.
| std::vector< PseudoJet > fastjet::PseudoJet::pieces | ( | ) | const [virtual] |
retrieve the pieces that make up the jet.
If the jet does not support pieces, an error is throw
Definition at line 656 of file PseudoJet.cc.
| double fastjet::PseudoJet::area | ( | ) | const [virtual] |
return the jet (scalar) area.
throws an Error if there is no support for area in the parent CS
Definition at line 691 of file PseudoJet.cc.
| double fastjet::PseudoJet::area_error | ( | ) | const [virtual] |
return the error (uncertainty) associated with the determination of the area of this jet.
throws an Error if there is no support for area in the parent CS
Definition at line 699 of file PseudoJet.cc.
| PseudoJet fastjet::PseudoJet::area_4vector | ( | ) | const [virtual] |
return the jet 4-vector area.
throws an Error if there is no support for area in the parent CS
Definition at line 706 of file PseudoJet.cc.
| bool fastjet::PseudoJet::is_pure_ghost | ( | ) | const [virtual] |
true if this jet is made exclusively of ghosts.
throws an Error if there is no support for area in the parent CS
Definition at line 713 of file PseudoJet.cc.
| int fastjet::PseudoJet::cluster_hist_index | ( | ) | const [inline] |
return the cluster_hist_index, intended to be used by clustering routines.
Definition at line 751 of file PseudoJet.hh.
1.7.4