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// -*- C++ -*-
#ifndef RIVET_LeadingParticlesFinalState_HH
#define RIVET_LeadingParticlesFinalState_HH
#include "Rivet/Event.hh"
#include "Rivet/Projection.hh"
#include "Rivet/Projections/FinalState.hh"
namespace Rivet {
class Particle;
/// @brief Get the highest-pT occurrences of FS particles with the specified PDG IDs.
class LeadingParticlesFinalState : public FinalState {
public:
/// Constructor: the supplied FinalState projection is assumed to live through the run.
LeadingParticlesFinalState(const FinalState& fsp)
: FinalState(), _leading_only(false)
{
setName("LeadingParticlesFinalState");
addProjection(fsp, "FS");
}
/// Clone on the heap.
virtual const Projection *clone() const {
return new LeadingParticlesFinalState(*this);
}
/// Add a particle ID to the list of leading particles selected
LeadingParticlesFinalState& addParticleId(long id) {
_ids.insert(id);
return *this;
}
/// Add a particle ID to the list of leading particles selected
LeadingParticlesFinalState& addParticleIdPair(long id) {
_ids.insert(id);
_ids.insert(-id);
return *this;
}
/// Toggle whether to keep track only of the leading particle of any ID,
/// or the leading particle of all IDs separately
/// Default is the latter (=false)
void setLeadingOnly(const bool& leadingonly) {
_leading_only = leadingonly;
}
// /// Check if a particle of a particular ID was found in the current event
// bool hasParticleId(const PdgId pid) const;
// /// Get a particle of a particular ID (check it exists first)
// bool get(const PdgId pid) const;
protected:
/// Apply the projection on the supplied event.
void project(const Event& e);
/// Compare projections.
int compare(const Projection& p) const;
/// Check if the particle's ID is in the list
bool inList(const Particle& particle) const;
private:
/// IDs of the leading particles to be selected
std::set<long>_ids;
bool _leading_only;
};
}
#endif
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