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// Njettiness Package
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// Version 0.4.1 (January 22, 2012)
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// Questions/Comments? jthaler@jthaler.net
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// Copyright (c) 2011-12, Jesse Thaler, Ken Van Tilburg, and Christopher K.
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// Vermilion
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//
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//----------------------------------------------------------------------
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// This file is part of the N-jettiness package ("N-jettiness").
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//
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// This file has been modified to run with the SFrame analysis.
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// It's original version comes from SpartyJet.
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//----------------------------------------------------------------------
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#ifndef __NSUBJETTINESS_HH__
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#define __NSUBJETTINESS_HH__
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#include "Njettiness.h"
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#include "fastjet/FunctionOfPseudoJet.hh"
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#include <string>
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#include <climits>
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#ifndef G__DICTIONARY
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typedef double Double32_t; // ROOT will store as 32-bit, but in code is double
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#endif
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FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
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/// Nsubjettiness extends the concept of Njettiness to a jet shape, but other
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/// than the set of particles considered, they are identical. This class
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/// wraps the core Njettiness code to provide the fastjet::FunctionOfPseudoJet
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/// interface for convenience in larger analyses. See NjettinessPlugin.hh for
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/// definitions of tau_N and the constructor options.
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class Nsubjettiness : public FunctionOfPseudoJet<Double32_t> {
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public:
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Nsubjettiness(int N, Njettiness::AxesMode mode, double beta, double R0, double Rcutoff=std::numeric_limits<double>::max());
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/// returns tau_N, measured on the constituents of this jet
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Double32_t result(const PseudoJet& jet) const;
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Double32_t result(const std::vector<fastjet::PseudoJet> particles) const;
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private:
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int _N;
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mutable Njettiness _njettinessFinder; // should muck with this so result can be const without this mutable
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};
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FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh
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#endif // __NSUBJETTINESS_HH__
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