Rivet analyses

title: CDF_1998_I448075

Differential cross-section for events with large total transverse energy

Experiment: CDF (Tevatron Run 1)

Inspire ID: 448075

Status: VALIDATED

Authors: - Frank Siegert

References: - Phys.Rev.Lett.80:3461-3466,1998 - 10.1103/PhysRevLett.80.3461

Beams: p- p+

Beam energies: (900.0, 900.0)GeV

Run details: - QCD events at Tevatron with $\sqrt{s}=1.8$ TeV without MPI.

Measurement of the differential cross section $\mathrm{d}\sigma/\mathrm{d}E_\perp^j$ for the production of multijet events in $p\bar{p}$ collisions where the sum is over all jets with transverse energy $E_\perp^j > E_\perp^\mathrm{min}$.

Source code:CDF_1998_I448075.cc

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

include "Rivet/Analysis.hh"

include "Rivet/Projections/FastJets.hh"

include "Rivet/Projections/FinalState.hh"

namespace Rivet {

/// @brief CDF diff cross-section in events with large missing energy class CDF_1998_I448075 : public Analysis { public:

RIVET_DEFAULT_ANALYSIS_CTOR(CDF_1998_I448075);


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

/// Book histograms and initialise projections before the run
void init() {
  FinalState fs(Cuts::abseta < 4.2);
  declare(FastJets(fs, JetAlg::CDFJETCLU, 0.7), "Jets");

  book(_h_sumET_20, 1, 1, 1);
  book(_h_sumET_100, 1, 1, 2);
}


/// Perform the per-event analysis
void analyze(const Event& event) {
  const Jets jets = apply<FastJets>(event, "Jets").jets(Cuts::Et > 20 * GeV, cmpMomByEt);
  double sumET_20(0.0), sumET_100(0.0);
  for (const Jet& jet : jets) {
    double ET = jet.Et() / GeV;
    sumET_20 += ET;
    if (ET > 100.0) sumET_100 += ET;
  }
  if (sumET_20 > 320.0) _h_sumET_20->fill(sumET_20);
  if (sumET_100 > 320.0) _h_sumET_100->fill(sumET_100);
}


/// Normalise histograms etc., after the run
void finalize() {
  scale(_h_sumET_20, crossSection() / picobarn / sumOfWeights());
  scale(_h_sumET_100, crossSection() / picobarn / sumOfWeights());
}

/// @}

private:

/// @name Histograms
/// @{
Histo1DPtr _h_sumET_20, _h_sumET_100;
/// @}

};

RIVET_DECLARE_ALIASED_PLUGIN(CDF_1998_I448075, CDF_1998_S3618439);

} ```

Aliases: - CDF_1998_S3618439