fftjetcms::JetConvergenceDistance Class Reference

#include <JetConvergenceDistance.h>

Inheritance diagram for fftjetcms::JetConvergenceDistance:

Public Member Functions
	JetConvergenceDistance (double etaToPhiBandwidthRatio, double relativePtBandwidth)
double	operator() (const fftjet::RecombinedJet< VectorLike > &jet1, const fftjet::RecombinedJet< VectorLike > &jet2) const

Private Member Functions
	JetConvergenceDistance ()

Private Attributes
double	etaBw_
double	phiBw_
double	ptBw_

Detailed Description

Definition at line 10 of file JetConvergenceDistance.h.

Constructor & Destructor Documentation

fftjetcms::JetConvergenceDistance::JetConvergenceDistance	(	double	etaToPhiBandwidthRatio,
		double	relativePtBandwidth
	)

Definition at line 7 of file JetConvergenceDistance.cc.

        : etaBw_(sqrt(etaToPhiBandwidthRatio)),
          phiBw_(1.0/etaBw_),
          ptBw_(relativePtBandwidth)
    {
        assert(etaToPhiBandwidthRatio > 0.0);
        assert(relativePtBandwidth > 0.0);
    }

fftjetcms::JetConvergenceDistance::JetConvergenceDistance ( )

private

Member Function Documentation

double fftjetcms::JetConvergenceDistance::operator()	(	const fftjet::RecombinedJet< VectorLike > &	jet1,
		const fftjet::RecombinedJet< VectorLike > &	jet2
	)		const

Definition at line 18 of file JetConvergenceDistance.cc.

References etaBw_, M_PI, mag2(), phiBw_, ptBw_, and mathSSE::sqrt().

    {
        const double deta = (j1.vec().Eta() - j2.vec().Eta())/etaBw_;
        double dphi = j1.vec().Phi() - j2.vec().Phi();
        if (dphi > M_PI)
            dphi -= (2.0*M_PI);
        else if (dphi < -M_PI)
            dphi += (2.0*M_PI);
        dphi /= phiBw_;
        const double mag1 = j1.magnitude();
        const double mag2 = j2.magnitude();
        double dmag = 0.0;
        if (mag1 > 0.0 || mag2 > 0.0)
            dmag = 2.0*(mag1 - mag2)/(mag1 + mag2)/ptBw_;
        return sqrt(deta*deta + dphi*dphi + dmag*dmag);
    }

Member Data Documentation

double fftjetcms::JetConvergenceDistance::etaBw_

private

Definition at line 24 of file JetConvergenceDistance.h.

Referenced by operator()().

double fftjetcms::JetConvergenceDistance::phiBw_

private

Definition at line 25 of file JetConvergenceDistance.h.

Referenced by operator()().

double fftjetcms::JetConvergenceDistance::ptBw_

private

Definition at line 26 of file JetConvergenceDistance.h.

Referenced by operator()().