SVfit_namespace Namespace Reference

Functions
reco::Candidate::Vector	compCrossProduct (const reco::Candidate::Vector &p1, const reco::Candidate::Vector &p2)
double	compScalarProduct (const reco::Candidate::Vector &p1, const reco::Candidate::Vector &p2)
reco::Candidate::Vector	normalize (const reco::Candidate::Vector &p)
double	phiLabFromLabMomenta (const reco::Candidate::LorentzVector &motherP4, const reco::Candidate::LorentzVector &visP4)
double	square (double x)

Function Documentation

reco::Candidate::Vector SVfit_namespace::compCrossProduct	(	const reco::Candidate::Vector &	p1,
		const reco::Candidate::Vector &	p2
	)

Definition at line 56 of file MCEmbeddingValidationAnalyzer.cc.

Referenced by phiLabFromLabMomenta().

  {
    double p3_x = p1.y()*p2.z() - p1.z()*p2.y();
    double p3_y = p1.z()*p2.x() - p1.x()*p2.z();
    double p3_z = p1.x()*p2.y() - p1.y()*p2.x();
    return reco::Candidate::Vector(p3_x, p3_y, p3_z);
  }

double SVfit_namespace::compScalarProduct	(	const reco::Candidate::Vector &	p1,
		const reco::Candidate::Vector &	p2
	)

Definition at line 51 of file MCEmbeddingValidationAnalyzer.cc.

Referenced by phiLabFromLabMomenta().

  {
    return (p1.x()*p2.x() + p1.y()*p2.y() + p1.z()*p2.z());
  }

reco::Candidate::Vector SVfit_namespace::normalize

(

const reco::Candidate::Vector &

p

)

Definition at line 40 of file MCEmbeddingValidationAnalyzer.cc.

References mag(), mag2(), AlCaHLTBitMon_ParallelJobs::p, and square().

Referenced by Rivet::CMS_2013_I1224539_DIJET::finalize(), and phiLabFromLabMomenta().

  {
    double p_x = p.x();
    double p_y = p.y();
    double p_z = p.z();
    double mag2 = square(p_x) + square(p_y) + square(p_z);
    if ( mag2 <= 0. ) return p;
    double mag = TMath::Sqrt(mag2);
    return reco::Candidate::Vector(p_x/mag, p_y/mag, p_z/mag);
  }

double SVfit_namespace::phiLabFromLabMomenta	(	const reco::Candidate::LorentzVector &	motherP4,
		const reco::Candidate::LorentzVector &	visP4
	)

Definition at line 64 of file MCEmbeddingValidationAnalyzer.cc.

References compCrossProduct(), compScalarProduct(), and normalize().

Referenced by MCEmbeddingValidationAnalyzer::analyze().

  {
    reco::Candidate::Vector u_z = normalize(reco::Candidate::Vector(visP4.px(), visP4.py(), visP4.pz()));
    reco::Candidate::Vector u_y = normalize(compCrossProduct(reco::Candidate::Vector(0., 0., 1.), u_z));
    reco::Candidate::Vector u_x = compCrossProduct(u_y, u_z);
    
    reco::Candidate::Vector p3Mother_unit = normalize(reco::Candidate::Vector(motherP4.px(), motherP4.py(), motherP4.pz()));
    
    double phi_lab = TMath::ATan2(compScalarProduct(p3Mother_unit, u_y), compScalarProduct(p3Mother_unit, u_x));
    return phi_lab;
  }

double SVfit_namespace::square ( double  x )

inline

Definition at line 35 of file MCEmbeddingValidationAnalyzer.cc.

Referenced by normalize().

  {
    return x*x;
  }