Rivet analyses

title: CDF_2000_I511377

Inclusive jet cross section differential in dijet mass

Experiment: CDF (Tevatron Run 1)

Inspire ID: 511377

Status: VALIDATED

Authors: - Frank Siegert

References: - Phys.Rev.D61:091101,2000 - DOI: 10.1103/PhysRevD.61.091101 - arXiv: hep-ex/9912022

Beams: p- p+

Beam energies: (900.0, 900.0)GeV

Run details: - Dijet events at Tevatron with $\sqrt{s}=1.8$ TeV

Measurement of the cross section for production of two or more jets as a function of dijet mass in the range 180 to 1000 GeV. It is based on an integrated luminosity of $86 \mathrm{pb}^{-1}$.

Source code:CDF_2000_I511377.cc

```c++ // -- C++ --

include "Rivet/Analysis.hh"

include "Rivet/Projections/FastJets.hh"

include "Rivet/Projections/FinalState.hh"

namespace Rivet {

/// @brief CDF dijet cross-section, differential in dijet mass class CDF_2000_I511377 : public Analysis { public:

RIVET_DEFAULT_ANALYSIS_CTOR(CDF_2000_I511377);


/// @name Analysis methods
/// @{

/// Book histograms and initialise projections before the run
void init() {
  FinalState fs((Cuts::etaIn(-4.2, 4.2)));
  declare(FastJets(fs, JetAlg::CDFJETCLU, 0.7), "Jets");
  book(_h_mjj, 1, 1, 1);
}


/// Perform the per-event analysis
void analyze(const Event& event) {
  Jets jets = apply<FastJets>(event, "Jets").jets(cmpMomByEt);
  if (jets.size() < 2) vetoEvent;
  FourMomentum jet1 = jets[0].momentum();
  FourMomentum jet2 = jets[1].momentum();
  double eta1 = jet1.eta();
  double eta2 = jet2.eta();
  if (fabs(eta1) > 2.0 || fabs(eta2) > 2.0) vetoEvent;
  if (fabs(tanh((eta1 - eta2) / 2)) > 2.0 / 3.0) vetoEvent;
  double mjj = FourMomentum(jet1 + jet2).mass() / GeV;
  if (mjj < 180) vetoEvent;
  _h_mjj->fill(mjj);
}


/// Normalise histograms etc., after the run
void finalize() {
  scale(_h_mjj, crossSection() / picobarn / sumOfWeights());
}

/// @}

private:

/// Histogram
Histo1DPtr _h_mjj;

};

RIVET_DECLARE_ALIASED_PLUGIN(CDF_2000_I511377, CDF_2000_S4266730);

} ```

Aliases: - CDF_2000_S4266730