Rivet analyses

title: CMS_2012_I1087342

Measurement of forward and forward+central jets at $\sqrt{s} = 7$ TeV

Experiment: CMS (LHC)

Inspire ID: 1087342

Status: VALIDATED

Authors: - Albert Knutsson - Rasmus Sloth Hansen - Bo Zhu

References: - JHEP 1206 (2012) 036 - Expt page: CMS-FWD-11-002 - CERN-PH-EP-2011-179 - doi 10.1007/JHEP06(2012)036 - arXiv: 1202.0704

Beams: p+ p+

Beam energies: (3500.0, 3500.0)GeV

Run details: - pp QCD interactions at 7 TeV.

Inclusive forward jets and forward+central jets measured by CMS at $\sqrt{s} = 7$ TeV.

Source code:CMS_2012_I1087342.cc

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

include "Rivet/Analysis.hh"

include "Rivet/Projections/FastJets.hh"

include "Rivet/Projections/FinalState.hh"

namespace Rivet {

// This analysis is a derived from the class Analysis: class CMS_2012_I1087342 : public Analysis {

public:

// Constructor
CMS_2012_I1087342()
    : Analysis("CMS_2012_I1087342") { }

void init() {
  const FinalState fs;
  declare(FastJets(fs, JetAlg::ANTIKT, 0.5), "Jets");

  book(_hist_jetpt_fwdincl, 1, 1, 1);
  book(_hist_jetpt_forward, 2, 1, 1);
  book(_hist_jetpt_central, 3, 1, 1);
}

void analyze(const Event& event) {

  const FastJets& fj = apply<FastJets>(event, "Jets");
  const Jets jets = fj.jets(Cuts::ptIn(35 * GeV, 150 * GeV) && Cuts::abseta < 4.7);

  double cjet_pt = 0.0;
  double fjet_pt = 0.0;

  for (const Jet& j : jets) {
    double pT = j.pT();
    if (j.abseta() > 3.2) {
      _hist_jetpt_fwdincl->fill(j.pT() / GeV);
    }
    if (j.abseta() < 2.8) {
      if (cjet_pt < pT) cjet_pt = pT;
    }
    if (inRange(j.abseta(), 3.2, 4.7)) {
      if (fjet_pt < pT) fjet_pt = pT;
    }
  }

  if (cjet_pt > 35 * GeV && fjet_pt > 35 * GeV) {
    _hist_jetpt_forward->fill(fjet_pt / GeV);
    _hist_jetpt_central->fill(cjet_pt / GeV);
  }
}


void finalize() {
  scale(_hist_jetpt_fwdincl, crossSection() / picobarn / sumOfWeights() / 3.0);
  scale(_hist_jetpt_forward, crossSection() / picobarn / sumOfWeights() / 3.0);
  scale(_hist_jetpt_central, crossSection() / picobarn / sumOfWeights() / 5.6);
}

private:

Histo1DPtr _hist_jetpt_fwdincl;
Histo1DPtr _hist_jetpt_forward;
Histo1DPtr _hist_jetpt_central;

};

RIVET_DECLARE_PLUGIN(CMS_2012_I1087342);

} ```