Rivet analyses

Transverse momentum of the W boson

Experiment: D0 (Tevatron Run 1)

Inspire ID: 535017

Status: VALIDATED

Authors: - Frank Siegert

References: - Phys.Lett. B513 (2001) 292-300 - DOI: 10.1016/S0370-2693(01)00628-1 - arXiv: hep-ex/0010026

Beams: p- p+

Beam energies: (900.0, 900.0)GeV

Run details: - Production of W+ and W- decaying into the electron channel.

Measurement of the differential cross section for W boson production as a function of its transverse momentum. The data were collected by the D0 experiment at the Fermilab Tevatron Collider during 1994-1995 and correspond to an integrated luminosity of 85 pb−1.

Source code:D0_2000_I535017.cc

// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/MissingMomentum.hh"
#include "Rivet/Projections/LeptonFinder.hh"

namespace Rivet {


  /// D0 transverse momentum of the W boson
  class D0_2000_I535017 : public Analysis {
  public:

    RIVET_DEFAULT_ANALYSIS_CTOR(D0_2000_I535017);


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

    /// Book histograms and initialise projections before the run
    void init() {
      declare("MET", MissingMomentum());
      LeptonFinder ef(0.2, Cuts::abseta < 5 && Cuts::abspid == PID::ELECTRON);
      declare(ef, "Elecs");

      book(_h_W_pT ,1, 1, 1);
    }


    /// Perform the per-event analysis
    void analyze(const Event& event) {
      const P4& pmiss = apply<MissingMom>(event, "MET").missingMom();
      const Particles& es = apply<LeptonFinder>(event, "Elecs").particles();
      const int ifound = closestMatchIndex(es, pmiss, Kin::mass, 80.4*GeV, 0*GeV, 200*GeV);

      if (ifound < 0) vetoEvent;
      _h_W_pT->fill((pmiss+es[ifound].mom()).pT()/GeV);
    }


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

    /// @}


  private:

    /// Histogram
    Histo1DPtr _h_W_pT;

  };


  RIVET_DECLARE_ALIASED_PLUGIN(D0_2000_I535017, D0_2000_S4480767);

}

Aliases: - D0_2000_S4480767