Rivet analyses

title: TOTEM_2012_I1220862

Measurement of proton-proton elastic scattering and total cross section at $\sqrt{s} = 7~\TeV$

Experiment: TOTEM (LHC)

Inspire ID: 1220862

Status: VALIDATED

Authors: - Sercan Sen - Peter Skands

References: - CERN-PH-EP-2012-239 - http://cds.cern.ch/record/1472948

Beams: p+ p+

Beam energies: (3500.0, 3500.0)GeV

Run details: - Elastic events only.

Measurement of the elastic differential cross-section in proton-proton interactions at a centre-of-mass energy $\sqrt{s} = 7~\TeV$ at the LHC. The data, which cover the $|t|$ range $0.005-0.2~\GeV^2$, were collected using Roman Pot detectors very close to the outgoing beam in October 2011, allowing the precise extrapolation down to the optical point, $t = 0$, and hence the derivation of the elastic as well as the total cross-section via the optical theorem.

Source code:TOTEM_2012_I1220862.cc

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

include "Rivet/Analysis.hh"

include "Rivet/Projections/ChargedFinalState.hh"

namespace Rivet {

/// TOTEM elastic and total cross-section measurement class TOTEM_2012_I1220862 : public Analysis { public:

TOTEM_2012_I1220862()
    : Analysis("TOTEM_2012_I1220862") { }


void init() {
  declare(ChargedFinalState(), "CFS");
  book(_hist_tlow, 1, 1, 1);
  book(_hist_thigh, 2, 1, 1);
  book(_hist_sigma, 3, 1, 1);
}


void analyze(const Event& event) {
  const ChargedFinalState& cfs = apply<ChargedFinalState>(event, "CFS");
  if (cfs.size() > 2) MSG_DEBUG("Final state includes more than two charged particles!");
  _hist_sigma->fill(sqrtS() / GeV);

  for (const Particle& p : cfs.particles(Cuts::eta > 0)) { // && Cuts::pid == PID::PROTON)) {
    if (p.pid() != PID::PROTON) continue;
    const double t = sqr(p.pT());
    _hist_tlow->fill(t);
    _hist_thigh->fill(t);
  }
}


void finalize() {
  normalize(_hist_tlow, crossSection() / millibarn);
  normalize(_hist_thigh, crossSection() / millibarn);
  normalize(_hist_sigma, crossSection() / millibarn);
}

private:

Histo1DPtr _hist_tlow, _hist_thigh, _hist_sigma;

};

RIVET_DECLARE_ALIASED_PLUGIN(TOTEM_2012_I1220862, TOTEM_2012_002);

} ```

Aliases: - TOTEM_2012_002