pat::MuonSelector Class Reference

Selects good muons. More...

#include "PhysicsTools/PatUtils/MuonSelector.h"

Public Member Functions
const pat::ParticleStatus	filter (const unsigned int &index, const edm::View< reco::Muon > &muons) const
	MuonSelector (const MuonSelection &cfg)
	~MuonSelector ()

Private Member Functions
const pat::ParticleStatus	customSelection_ (const unsigned int &index, const edm::View< reco::Muon > &muons) const
	Full-fledged selection based on SusyAnalyser. More...
const pat::ParticleStatus	muIdSelection_ (const unsigned int &index, const edm::View< reco::Muon > &muons) const

Private Attributes
MuonSelection	config_

Detailed Description

Selects good muons.

The muon selector returns a flag (see pat::ParticleStatus) based on one of the possible selections: reconstruction-based (global muons) or muId based (various algorithms), or custom (user-defined set of cuts). This is driven by the configuration parameters (see the PATMuonCleaner documentation for configuration details).

The parameters are passed to the selector through an MuonSelection struct. (An adapter exists for use in CMSSW: reco::modules::ParameterAdapter< pat::MuonSelector >.)

Author

F.J. Ronga (ETH Zurich)

Version

Id:

MuonSelector.h,v 1.7 2008/10/10 13:59:06 lowette Exp

Definition at line 50 of file MuonSelector.h.

Constructor & Destructor Documentation

pat::MuonSelector::MuonSelector ( const MuonSelection &  cfg )

inline

Definition at line 54 of file MuonSelector.h.

: config_( cfg ) {}

pat::MuonSelector::~MuonSelector ( )

inline

Definition at line 55 of file MuonSelector.h.

{}

Member Function Documentation

const pat::ParticleStatus MuonSelector::customSelection_ ( const unsigned int &  index, const edm::View< reco::Muon > &  muons  ) const

private

Full-fledged selection based on SusyAnalyser.

Definition at line 43 of file MuonSelector.cc.

References pat::BAD, pat::GOOD, and cmsHarvester::index.

{

  // Custom muon selection from SusyAnalyzer (TQAF has a subset of these cuts)

  // Use global muon if possible
  TrackRef muontrack;
  if ( muons[index].isGlobalMuon() )
    muontrack = muons[index].track();
  else
    muontrack = muons[index].combinedMuon();

  float pt_track  = muontrack->pt();
  float dpt_track = muontrack->error(0)/muontrack->qoverp()*muontrack->pt();
  float chisq     = muontrack->normalizedChi2();
  int nHitsValid  = muontrack->numberOfValidHits();

  if ( dpt_track >= config_.dPbyPmax * pt_track ) return BAD;
  
  if ( chisq > config_.chi2max ) return BAD;

  if ( nHitsValid < config_.nHitsMin ) return BAD;

  return GOOD;

}

const pat::ParticleStatus MuonSelector::filter	(	const unsigned int &	index,
		const edm::View< reco::Muon > &	muons
	)		const

Returns 0 if muon matches criteria, a flag otherwise. Criteria depend on the selector's configuration.

Definition at line 12 of file MuonSelector.cc.

References pat::BAD, edm::errors::Configuration, Exception, and pat::GOOD.

{

  // List of possible selections
  if      ( config_.selectionType == "none"  ) 
    {
      return GOOD;
    }
  else if ( config_.selectionType == "globalMuons" )
    {
      if ( muons[index].isGlobalMuon() ) return GOOD;
      else return BAD;
    }
  else if ( config_.selectionType == "muonPOG"  )
    {
      return muIdSelection_( index, muons );
    }
  else if ( config_.selectionType == "custom"     ) 
    {
      return customSelection_( index, muons );
    }

  // Throw! unknown configuration
  throw edm::Exception(edm::errors::Configuration) 
    << "Unknown electron ID selection " << config_.selectionType;

}

const pat::ParticleStatus MuonSelector::muIdSelection_ ( const unsigned int &  index, const edm::View< reco::Muon > &  muons  ) const

private

Definition at line 74 of file MuonSelector.cc.

References pat::BAD, muon::caloCompatibility(), pat::GOOD, muon::isGoodMuon(), and muon::segmentCompatibility().

{
  // MuonID algorithm
  if ( muon::isGoodMuon((muons[index]),config_.flag) )
    {
      return BAD;
    }

  // Direct cuts on compatibility
  if (  muons[index].caloCompatibility()    <= config_.minCaloCompatibility
     || muon::segmentCompatibility(muons[index]) <= config_.minSegmentCompatibility )
    {
      return BAD;
    }

  return GOOD;
}

Member Data Documentation

MuonSelection pat::MuonSelector::config_

private

Definition at line 65 of file MuonSelector.h.