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diff --git a/analyses/pluginCMS/CMS_2012_I1102908.cc b/analyses/pluginCMS/CMS_2012_I1102908.cc
--- a/analyses/pluginCMS/CMS_2012_I1102908.cc
+++ b/analyses/pluginCMS/CMS_2012_I1102908.cc
@@ -1,89 +1,87 @@
// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Tools/BinnedHistogram.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include <sstream>
namespace Rivet {
- /// @cond
- inline double _invert(double x) { return (x > 0) ? 1/x : 0; }
- /// @endcond
-
/// @brief CMS inclusive and exclusive dijet production ratio at large rapidity intervals
class CMS_2012_I1102908 : public Analysis {
public:
CMS_2012_I1102908()
: Analysis("CMS_2012_I1102908")
{ }
void init() {
// Projections
declare(FastJets(FinalState(), FastJets::ANTIKT, 0.5), "antikT");
// Histograms
/// @todo Can we manage to only register these as they are "really" created in the finalize()?
_h_dijet_ratio = bookScatter2D(1, 1, 1);
_h_MN_dijet_ratio = bookScatter2D(2, 1, 1);
// Temporary histograms (directly instantiated)
_h_DeltaY_exclusive = bookHisto1D("TMP/excl",refData(1, 1, 1));
_h_DeltaY_inclusive = bookHisto1D("TMP/incl",refData(1, 1, 1));
_h_DeltaY_MN = bookHisto1D("TMP/YMN",refData(1, 1, 1));
}
void analyze(const Event & event) {
const double weight = event.weight();
// Jets with pT > 35.0, -4.7 < y < 4.7
const JetAlg& jet_alg = apply<JetAlg>(event, "antikT");
const Jets& jets = jet_alg.jets(Cuts::pT > 35*GeV && Cuts::absrap < 4.7);
// Veto event if number of jets less than 2
if (jets.size() < 2) return;
// Loop over jet pairs
double deltaY_MN = 0.0;
for (size_t ij1 = 0; ij1 < jets.size(); ++ij1) {
for (size_t ij2 = ij1 + 1; ij2 < jets.size(); ++ij2) {
const double deltaY = fabs(jets[ij1].rapidity() - jets[ij2].rapidity());
// Exclusive dijet case:
if (jets.size() == 2) _h_DeltaY_exclusive->fill(deltaY, weight);
// Inclusive jets case:
_h_DeltaY_inclusive->fill(deltaY, weight);
// Mueller-Navelet:
if (deltaY > deltaY_MN) deltaY_MN = deltaY;
}
}
_h_DeltaY_MN->fill(deltaY_MN, weight);
}
-
void finalize() {
- *_h_dijet_ratio = YODA::efficiency(*_h_DeltaY_exclusive, *_h_DeltaY_inclusive);
- *_h_MN_dijet_ratio = YODA::efficiency(*_h_DeltaY_exclusive, *_h_DeltaY_MN);
+ efficiency(_h_DeltaY_exclusive, _h_DeltaY_inclusive, _h_dijet_ratio);
+ efficiency(_h_DeltaY_exclusive, _h_DeltaY_MN, _h_MN_dijet_ratio);
transformY(*_h_dijet_ratio, _invert);
transformY(*_h_MN_dijet_ratio, _invert);
}
private:
+ /// Reciprocal function with div-by-zero protection, for inverting the efficiency measure
+ static double _invert(double x) { return (x > 0) ? 1/x : 0; }
+
/// @name Histograms
//@{
Scatter2DPtr _h_dijet_ratio, _h_MN_dijet_ratio;
Histo1DPtr _h_DeltaY_inclusive, _h_DeltaY_exclusive, _h_DeltaY_MN;
//@}
};
DECLARE_RIVET_PLUGIN(CMS_2012_I1102908);
}

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