ExhaustiveMuonTrajectoryBuilder Class Reference

#include <ExhaustiveMuonTrajectoryBuilder.h>

Inheritance diagram for ExhaustiveMuonTrajectoryBuilder:

Public Member Functions
	ExhaustiveMuonTrajectoryBuilder (const edm::ParameterSet &pset, const MuonServiceProxy *, edm::ConsumesCollector &)
void	setEvent (const edm::Event &event) override
	pass the Event to the algo at each event More...
TrajectoryContainer	trajectories (const TrajectorySeed &) override
	return a container of the reconstructed trajectories compatible with a given seed More...
CandidateContainer	trajectories (const TrackCand &) override
	return a container reconstructed muons starting from a given track More...
	~ExhaustiveMuonTrajectoryBuilder () override
Public Member Functions inherited from MuonTrajectoryBuilder
	MuonTrajectoryBuilder ()
	constructor More...
virtual	~MuonTrajectoryBuilder ()
	destructor More...

Private Member Functions
void	clean (TrajectoryContainer &trajectories) const

Private Attributes
MuonSeedFromRecHits	theSeeder
const MuonServiceProxy *	theService
StandAloneMuonTrajectoryBuilder	theTrajBuilder

Additional Inherited Members
Public Types inherited from MuonTrajectoryBuilder
typedef MuonCandidate::CandidateContainer	CandidateContainer
typedef std::pair< const Trajectory *, reco::TrackRef >	TrackCand
typedef MuonCandidate::TrajectoryContainer	TrajectoryContainer

Detailed Description

Instead of letting the SeedGenerator code choose a segment to start from, this TrajectoryBuilder makes a seed wfor each segment, and chooses the Trajectory with the most hits and the lowest chi-squared

Definition at line 17 of file ExhaustiveMuonTrajectoryBuilder.h.

Constructor & Destructor Documentation

ExhaustiveMuonTrajectoryBuilder::ExhaustiveMuonTrajectoryBuilder	(	const edm::ParameterSet &	pset,
		const MuonServiceProxy *	proxy,
		edm::ConsumesCollector &	iC
	)

Definition at line 6 of file ExhaustiveMuonTrajectoryBuilder.cc.

    : theTrajBuilder(pset, proxy, iC), theSeeder(), theService(proxy) {}

ExhaustiveMuonTrajectoryBuilder::~ExhaustiveMuonTrajectoryBuilder ( )

override

Definition at line 11 of file ExhaustiveMuonTrajectoryBuilder.cc.

{}

Member Function Documentation

void ExhaustiveMuonTrajectoryBuilder::clean ( TrajectoryContainer &  trajectories ) const

private

Definition at line 46 of file ExhaustiveMuonTrajectoryBuilder.cc.

References mps_fire::i, nhits, and mps_fire::result.

                                                                                   {
  // choose the one with the most hits, and the smallest chi-squared
  int best_nhits = 0;
  unsigned best = 0;
  unsigned ntraj = trajectories.size();
  for (unsigned i = 0; i < ntraj; ++i) {
    int nhits = trajectories[i]->foundHits();
    if (nhits > best_nhits) {
      best_nhits = nhits;
      best = i;
    } else if (nhits == best_nhits && trajectories[i]->chiSquared() < trajectories[best]->chiSquared()) {
      best = i;
    }
  }
  TrajectoryContainer result;
  for (unsigned i = 0; i < ntraj; ++i) {
    if (i == best) {
      result.push_back(trajectories[best]);
    } else {
      delete trajectories[i];
    }
  }
  trajectories.swap(result);
}

void ExhaustiveMuonTrajectoryBuilder::setEvent ( const edm::Event &  event )

overridevirtual

pass the Event to the algo at each event

Implements MuonTrajectoryBuilder.

Definition at line 44 of file ExhaustiveMuonTrajectoryBuilder.cc.

References StandAloneMuonTrajectoryBuilder::setEvent(), and theTrajBuilder.

{ theTrajBuilder.setEvent(event); }

MuonTrajectoryBuilder::TrajectoryContainer ExhaustiveMuonTrajectoryBuilder::trajectories ( const TrajectorySeed &  seed )

overridevirtual

return a container of the reconstructed trajectories compatible with a given seed

Implements MuonTrajectoryBuilder.

Definition at line 13 of file ExhaustiveMuonTrajectoryBuilder.cc.

References MuonSeedFromRecHits::createSeed(), PTrajectoryStateOnDet::detId(), PTrajectoryStateOnDet::error(), GlobalTrackingGeometry::idToDet(), PixelPluginsPhase0_cfi::isBarrel, AlCaHLTBitMon_ParallelJobs::p, PTrajectoryStateOnDet::parameters(), DiDispStaMuonMonitor_cfi::pt, FastTimerService_cff::range, TrajectorySeed::recHits(), mps_fire::result, MuonTransientTrackingRecHit::specificBuild(), mathSSE::sqrt(), TrajectorySeed::startingState(), DetId::subdetId(), theSeeder, theService, theTrajBuilder, MuonServiceProxy::trackingGeometry(), and StandAloneMuonTrajectoryBuilder::trajectories().

                                                                                                                 {
  LocalTrajectoryParameters localTrajectoryParameters(seed.startingState().parameters());
  LocalVector p(localTrajectoryParameters.momentum());
  int rawId = seed.startingState().detId();
  DetId detId(rawId);
  bool isBarrel = (detId.subdetId() == 1);
  // homemade local-to-global
  double pt = (isBarrel) ? -p.z() : p.perp();
  pt *= localTrajectoryParameters.charge();
  float err00 = seed.startingState().error(0);
  //   float p_err = sqr(sptmean/(ptmean*ptmean));
  //  mat[0][0]= p_err;
  float sigmapt = sqrt(err00) * pt * pt;
  TrajectorySeed::range range = seed.recHits();
  TrajectoryContainer result;
  // Make a new seed based on each segment, using the original pt and sigmapt
  for (TrajectorySeed::const_iterator recHitItr = range.first; recHitItr != range.second; ++recHitItr) {
    const GeomDet* geomDet = theService->trackingGeometry()->idToDet((*recHitItr).geographicalId());
    MuonTransientTrackingRecHit::MuonRecHitPointer muonRecHit =
        MuonTransientTrackingRecHit::specificBuild(geomDet, &*recHitItr);
    TrajectorySeed tmpSeed(theSeeder.createSeed(pt, sigmapt, muonRecHit));
    TrajectoryContainer trajectories(theTrajBuilder.trajectories(tmpSeed));
    result.insert(result.end(), trajectories.begin(), trajectories.end());
  }
  return result;
}

MuonTrajectoryBuilder::CandidateContainer ExhaustiveMuonTrajectoryBuilder::trajectories ( const TrackCand &  )

overridevirtual

return a container reconstructed muons starting from a given track

Implements MuonTrajectoryBuilder.

Definition at line 40 of file ExhaustiveMuonTrajectoryBuilder.cc.

                                                                                                      {
  return CandidateContainer();
}

Member Data Documentation

MuonSeedFromRecHits ExhaustiveMuonTrajectoryBuilder::theSeeder

private

Definition at line 35 of file ExhaustiveMuonTrajectoryBuilder.h.

Referenced by trajectories().

const MuonServiceProxy* ExhaustiveMuonTrajectoryBuilder::theService

private

Definition at line 36 of file ExhaustiveMuonTrajectoryBuilder.h.

Referenced by trajectories().

StandAloneMuonTrajectoryBuilder ExhaustiveMuonTrajectoryBuilder::theTrajBuilder

private

Definition at line 34 of file ExhaustiveMuonTrajectoryBuilder.h.

Referenced by setEvent(), and trajectories().