ParisiTensor.hh

// -*- C++ -*-
#ifndef RIVET_ParisiTensor_HH
#define RIVET_ParisiTensor_HH
 
#include "Rivet/Projection.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/Sphericity.hh"
#include "Rivet/Event.hh"
 
namespace Rivet {
 

  class ParisiTensor : public Projection {
  public:

    ParisiTensor(const FinalState& fsp)
    {
      setName("ParisiTensor");
      declare(fsp, "FS");
      declare(Sphericity(fsp, 1.0), "Sphericity");
      clear();
    }

    RIVET_DEFAULT_PROJ_CLONE(ParisiTensor);

    using Projection::operator =;
 
 
  protected:

    void project(const Event& e);

    CmpState compare(const Projection& p) const;
 
 
  public:

    void clear();
 
 
  public:

    double C() const { return _C; }
    double D() const { return _D; }

    double lambda1() const { return _lambda[0]; }
    double lambda2() const { return _lambda[1]; }
    double lambda3() const { return _lambda[2]; }
 
 
  protected:

    double _C, _D;

    double _lambda[3];
 
  };
 
 
}
 
#endif