Rivet analyses

title: CLEOII_1999_I501417

Spectra for $\Xi_c(2815)^{+,0}$ at 10.58 GeV

Experiment: CLEOII (CESR)

Inspire ID: 501417

Status: VALIDATED

Authors: - Peter Richardson

References: - Phys.Rev.Lett. 83 (1999) 3390-3393

Beams: e+ e-

Beam energies: (5.3, 5.3)GeV

Run details: - e+e- to hadrons

Spectrum for the average of $\Xi_c^{0}(2815)$ and $\Xi_c^{+}(2815)$ produced at 10.58 GeV measured by CLEOII.

Source code:CLEOII_1999_I501417.cc

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

include "Rivet/Analysis.hh"

include "Rivet/Projections/Beam.hh"

include "Rivet/Projections/UnstableParticles.hh"

namespace Rivet {

/// @brief Xi_c1 spectra class CLEOII_1999_I501417 : public Analysis { public:

/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(CLEOII_1999_I501417);


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

/// Book histograms and initialise projections before the run
void init() {
  // projections
  declare(Beam(), "Beams");
  declare(UnstableParticles(), "UFS");
  // book histos
  book(_h_Xi_c, 2, 1, 1);
}


/// Perform the per-event analysis
void analyze(const Event& event) {
  static const int id0 = 103144, idp = 103244;
  // Get beams and average beam momentum
  const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
  const double Emax = (beams.first.p3().mod() + beams.second.p3().mod()) / 2.0;
  const double Pmax = sqrt(sqr(Emax) - sqr(2.815));
  const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
  for (const Particle& p : ufs.particles(Cuts::abspid == id0 or Cuts::abspid == idp)) {
    double xp = p.momentum().p3().mod() / Pmax;
    _h_Xi_c->fill(xp);
  }
}


/// Normalise histograms etc., after the run
void finalize() {
  normalize(_h_Xi_c);
}

/// @}


/// @name Histograms
/// @{
Histo1DPtr _h_Xi_c;
/// @}

};

RIVET_DECLARE_PLUGIN(CLEOII_1999_I501417);

} ```