reco::V0Filter Class Reference

#include <V0Filter.h>

Public Member Functions
bool	operator() (const reco::TrackRef *tracks, unsigned int n) const
bool	operator() (const reco::Track *tracks, unsigned int n) const
bool	operator() (const std::vector< reco::TrackRef > &tracks) const
bool	operator() (const std::vector< reco::Track > &tracks) const
	V0Filter (const edm::ParameterSet &params)
	~V0Filter ()

Private Member Functions
bool	operator() (const reco::Track **tracks, unsigned int n) const

Private Attributes
double	k0sMassWindow

Detailed Description

Definition at line 12 of file V0Filter.h.

Constructor & Destructor Documentation

V0Filter::V0Filter

(

const edm::ParameterSet &

params

)

Definition at line 16 of file V0Filter.cc.

                                                :
    k0sMassWindow(params.getParameter<double>("k0sMassWindow"))
{
}

reco::V0Filter::~V0Filter ( )

inline

Definition at line 15 of file V0Filter.h.

{}

Member Function Documentation

bool V0Filter::operator()	(	const reco::TrackRef *	tracks,
		unsigned int	n
	)		const

Definition at line 53 of file V0Filter.cc.

References i, and n.

{
    std::vector<const reco::Track*> trackPtrs(n);
    for(unsigned int i = 0; i < n; i++)
        trackPtrs[i] = &*tracks[i];

    return (*this)(&trackPtrs[0], n);
}

bool V0Filter::operator()	(	const reco::Track *	tracks,
		unsigned int	n
	)		const

Definition at line 63 of file V0Filter.cc.

References i, and n.

{
    std::vector<const reco::Track*> trackPtrs(n);
    for(unsigned int i = 0; i < n; i++)
        trackPtrs[i] = &tracks[i];

    return (*this)(&trackPtrs[0], n);
}

bool reco::V0Filter::operator() ( const std::vector< reco::TrackRef > &  tracks ) const

inline

Definition at line 21 of file V0Filter.h.

    { return (*this)(&tracks[0], tracks.size()); }

bool reco::V0Filter::operator() ( const std::vector< reco::Track > &  tracks ) const

inline

Definition at line 25 of file V0Filter.h.

    { return (*this)(&tracks[0], tracks.size()); }

bool V0Filter::operator() ( const reco::Track **  tracks, unsigned int  n  ) const

inlineprivate

Definition at line 22 of file V0Filter.cc.

References abs, DeDxDiscriminatorTools::charge(), reco::ParticleMasses::k0, k0sMassWindow, and reco::ParticleMasses::piPlus.

{
    // only check for K0s for now

    if (n != 2)
        return true;

    if (tracks[0]->charge() * tracks[1]->charge() > 0)
        return true;

    ROOT::Math::LorentzVector<ROOT::Math::PxPyPzM4D<double> > vec1;
    ROOT::Math::LorentzVector<ROOT::Math::PxPyPzM4D<double> > vec2;

    vec1.SetPx(tracks[0]->px());
    vec1.SetPy(tracks[0]->py());
    vec1.SetPz(tracks[0]->pz());
    vec1.SetM(ParticleMasses::piPlus);

    vec2.SetPx(tracks[1]->px());
    vec2.SetPy(tracks[1]->py());
    vec2.SetPz(tracks[1]->pz());
    vec2.SetM(ParticleMasses::piPlus);

    double invariantMass = (vec1 + vec2).M();
    if (std::abs(invariantMass - ParticleMasses::k0) < k0sMassWindow)
        return false;

    return true;
}

Member Data Documentation

double reco::V0Filter::k0sMassWindow

private

Definition at line 32 of file V0Filter.h.

Referenced by operator()().