Rivet analyses

Z/γ* + X cross-section shape, differential in y(Z)

Experiment: D0 (Tevatron Run 2)

Inspire ID: 744624

Status: VALIDATED

Authors: - Andy Buckley - Gavin Hesketh - Frank Siegert

References: - Phys.Rev.D76:012003,2007 - arXiv: hep-ex/0702025

Beams: p- p+

Beam energies: (980.0, 980.0)GeV

Run details: - Drell-Yan pp̄ → Z/γ* + jets events at $\sqrt{s}$ = 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than 71 < mee < 111 GeV

Cross sections as a function of di-electron rapidity pp̄ collisions at $\sqrt{s}$ = 1.96 TeV, based on an integrated luminosity of 0.4 fb−1.

Source code:D0_2007_I744624.cc

// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/DileptonFinder.hh"

namespace Rivet {


  /// @brief Measurement of D0 Run II Z \f$ p_\perp \f$ diff cross-section shape
  ///
  /// @author Andy Buckley
  /// @author Gavin Hesketh
  /// @author Frank Siegert
  class D0_2007_I744624 : public Analysis {
  public:

    RIVET_DEFAULT_ANALYSIS_CTOR(D0_2007_I744624);


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

    /// Book histograms
    void init() {
      DileptonFinder zfinder(91.2*GeV, 0.2, Cuts::abspid == PID::ELECTRON, Cuts::massIn(71*GeV, 111*GeV));
      declare(zfinder, "DileptonFinder");

      book(_h_yZ ,1, 1, 1);
    }


    /// Do the analysis
    void analyze(const Event & e) {
      const DileptonFinder& zfinder = apply<DileptonFinder>(e, "DileptonFinder");
      if (zfinder.bosons().size() == 1) {
        const Particles& el(zfinder.constituents());
        if (el[0].pT() > 25*GeV || el[1].pT() > 25*GeV) {
          _h_yZ->fill(fabs(zfinder.bosons()[0].rapidity()));
        }
      } else {
        MSG_DEBUG("No unique lepton pair found.");
      }
    }


    // Finalize
    void finalize() {
      // Data seems to have been normalized for the avg of the two sides
      // (+ve & -ve rapidity) rather than the sum, hence the 0.5:
      normalize(_h_yZ, 0.5);
    }

    /// @}


  private:

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

  };



  RIVET_DECLARE_ALIASED_PLUGIN(D0_2007_I744624, D0_2007_S7075677);

}

Aliases: - D0_2007_S7075677