Rivet  1.8.3
ParisiTensor.hh
1 // -*- C++ -*-
2 #ifndef RIVET_ParisiTensor_HH
3 #define RIVET_ParisiTensor_HH
4 
5 #include "Rivet/Projection.hh"
6 #include "Rivet/Projections/FinalState.hh"
7 #include "Rivet/Projections/Sphericity.hh"
8 #include "Rivet/Event.hh"
9 
10 namespace Rivet {
11 
12 
40  class ParisiTensor : public Projection {
41  public:
42 
45  {
46  setName("ParisiTensor");
47  addProjection(fsp, "FS");
48  addProjection(Sphericity(fsp, 1.0), "Sphericity");
49  clear();
50  }
51 
53  virtual const Projection* clone() const {
54  return new ParisiTensor(*this);
55  }
56 
57 
58  protected:
59 
61  void project(const Event& e);
62 
64  int compare(const Projection& p) const;
65 
66 
67  public:
68 
70  void clear();
71 
72 
73  public:
74 
77  double C() const { return _C; }
78  double D() const { return _D; }
80 
83  double lambda1() const { return _lambda[0]; }
84  double lambda2() const { return _lambda[1]; }
85  double lambda3() const { return _lambda[2]; }
87 
88 
89  private:
90 
92  double _C, _D;
93 
95  double _lambda[3];
96 
97  };
98 
99 
100 }
101 
102 
103 #endif
void setName(const std::string &name)
Used by derived classes to set their name.
Definition: Projection.hh:120
Definition: MC_JetAnalysis.hh:9
ParisiTensor(const FinalState &fsp)
Constructor. The provided FinalState projection must live throughout the run.
Definition: ParisiTensor.hh:44
void project(const Event &e)
Perform the projection on the Event.
Definition: ParisiTensor.cc:23
virtual const Projection * clone() const
Clone on the heap.
Definition: ParisiTensor.hh:53
Calculate the sphericity event shape.
Definition: Sphericity.hh:51
Definition: Event.hh:22
Project out all final-state particles in an event. Probably the most important projection in Rivet! ...
Definition: FinalState.hh:14
const PROJ & addProjection(const PROJ &proj, const std::string &name)
Definition: ProjectionApplier.hh:113
Calculate the Parisi event shape tensor (or linear momentum tensor).
Definition: ParisiTensor.hh:40
Base class for all Rivet projections.
Definition: Projection.hh:28
void clear()
Clear the projection.
Definition: ParisiTensor.cc:14
int compare(const Projection &p) const
Compare with other projections.
Definition: ParisiTensor.cc:9