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 override

Private Member Functions
	JetConvergenceDistance ()=delete

Private Attributes
double	etaBw_
double	phiBw_
double	ptBw_

Detailed Description

Definition at line 10 of file JetConvergenceDistance.h.

Constructor & Destructor Documentation

JetConvergenceDistance() [1/2]

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);
  }

References cms::cuda::assert(), fftjetcommon_cfi::etaToPhiBandwidthRatio, and fftjetcommon_cfi::relativePtBandwidth.

JetConvergenceDistance() [2/2]

fftjetcms::JetConvergenceDistance::JetConvergenceDistance ( )

privatedelete

Member Function Documentation

operator()()

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

override

Definition at line 13 of file JetConvergenceDistance.cc.

                                                                                             {
    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);
  }

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

Member Data Documentation

etaBw_

double fftjetcms::JetConvergenceDistance::etaBw_

private

Definition at line 21 of file JetConvergenceDistance.h.

Referenced by operator()().

phiBw_

double fftjetcms::JetConvergenceDistance::phiBw_

private

Definition at line 22 of file JetConvergenceDistance.h.

Referenced by operator()().

ptBw_

double fftjetcms::JetConvergenceDistance::ptBw_

private

Definition at line 23 of file JetConvergenceDistance.h.

Referenced by operator()().