Removing TT hits from long tracks can be a good check to see effects which are caused by the TT.

Add the following two source files f.ex. to Tr/TrackTools. <code c> Gaudi #include “GaudiKernel/AlgFactory.h” #include <boost/foreach.hpp> track interfaces #include “Kernel/ISTChannelIDSelector.h” #include “Event/Track.h”

#include “Kernel/LHCbID.h” #include “TrackRemoveSTIDs.h”

using namespace LHCb;

DECLARE_ALGORITHM_FACTORY( TrackRemoveSTIDs );

TrackRemoveSTIDs::TrackRemoveSTIDs(const std::string& name,

                     ISvcLocator* pSvcLocator):
GaudiAlgorithm(name, pSvcLocator)

{

// constructor

this→declareProperty(“selectorType”, m_selectorType = “STSelectChannelIDByElement”); this→declareProperty(“inputLocation”, m_inputLocation = TrackLocation::Default); }

TrackRemoveSTIDs::~TrackRemoveSTIDs() {

// destructor

}

StatusCode TrackRemoveSTIDs::initialize() {

// Initializes TsaInitialization at the begin of program execution.

StatusCode sc = GaudiAlgorithm::initialize();
if (sc.isFailure()){
   return Error("Failed to initialize");
}

// da selector
m_selector = tool<ISTChannelIDSelector>(m_selectorType, "RemovalSelector");

return StatusCode::SUCCESS;

}

StatusCode TrackRemoveSTIDs::execute(){

Tracks* trackCont = get<Tracks>(m_inputLocation);
// loop and remove the hits
for (Tracks::const_iterator iterT = trackCont->begin(); iterT != trackCont->end(); ++iterT){
  if ((*iterT)->type() == Track::Long) removeHits(*iterT);
} // iterT

return StatusCode::SUCCESS;

};

void TrackRemoveSTIDs::removeHits(Track* aTrack) const{

// get the list of ones to remove....
std::vector<LHCb::LHCbID> tmpCont;
const std::vector<LHCb::LHCbID>& ids = aTrack->lhcbIDs();
BOOST_FOREACH(LHCb::LHCbID id, ids) { 
  if (m_selector->select(id.stID()) == true) tmpCont.push_back(id);
}

BOOST_FOREACH(LHCb::LHCbID dead, tmpCont){ 
  aTrack->removeFromLhcbIDs(dead);
}

}

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