Quantities.h

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#pragma once

#include "Kappa/DataFormats/interface/Kappa.h"
#include "TVector2.h"
#include "TVector.h"
#include "TMatrixTSym.h"

typedef ROOT::Math::DisplacementVector3D<ROOT::Math::Cartesian3D<float>,ROOT::Math::DefaultCoordinateSystemTag> RMDataV;


class Quantities {

public:
        static double CalculateMtH2Tau(RMFLV const& vector1, RMFLV const& vector2);
        static double CalculateMt(RMFLV const& vector1, RMFLV const& vector2);
        
        static RMDataV Zeta(RMFLV const& lepton1, RMFLV const& lepton2);
        static double PZetaVis(RMFLV const& lepton1, RMFLV const& lepton2);
        static double PZetaMissVis(RMFLV const& lepton1, RMFLV const& lepton2,
                                   RMFLV const& met, float alpha=0.85);

        static double MetChiSquare(TVector2 const& v, ROOT::Math::SMatrix<double, 2> matrix);
private:
        Quantities() {  };
};