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## Rivet analyses reference

### D0_2010_S8671338

Measurement of differential $Z/\gamma^*$ pT
Experiment: D0 (Tevatron Run 2)
Inspire ID: 856972
Status: VALIDATED
Authors:
• Flavia Dias
• Gavin Hesketh
• Frank Siegert
References:
Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
• $p \bar{p} \to \mu^+ \mu^-$ + jets at 1960 GeV. Needs mass cut on lepton pair to avoid photon singularity, looser than $65 < m_{\mu\mu} < 115$ GeV. Restrict $Z/\gamma^*$ mass range to roughly $50 \text{GeV}/c^2 < m_{\mu\mu} < 120 \text{GeV}/c^2$ for efficiency. Weighted events and kinematic sampling enhancement can help to fill the pT tail.

Cross section as a function of pT of the Z boson decaying into muons in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV, based on an integrated luminosity of 0.97 fb$^{-1}$.

Source code: D0_2010_S8671338.cc
  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/FinalState.hh" #include "Rivet/Projections/ZFinder.hh" namespace Rivet { /// @brief Measurement of Z(->muon muon) pT differential cross-section /// @author Flavia Dias class D0_2010_S8671338 : public Analysis { public: /// Constructor D0_2010_S8671338() : Analysis("D0_2010_S8671338") { } ///@name Analysis methods //@{ /// Add projections and book histograms void init() { Cut cut = Cuts::abseta < 1.7 && Cuts::pT > 15*GeV; ZFinder zfinder(FinalState(), cut, PID::MUON, 65*GeV, 115*GeV, 0.2, ZFinder::NOCLUSTER, ZFinder::TRACK); declare(zfinder, "ZFinder"); _h_Z_pT_normalised = bookHisto1D(1, 1, 1); _h_Z_pT_xs = bookHisto1D(2, 1, 1); } // Do the analysis void analyze(const Event& e) { const double weight = e.weight(); const ZFinder& zfinder = apply(e, "ZFinder"); if (zfinder.bosons().size()==1) { double ZpT = zfinder.bosons()[0].pT()/GeV; _h_Z_pT_normalised->fill(ZpT, weight); _h_Z_pT_xs->fill(ZpT, weight); } } /// Finalize void finalize() { normalize(_h_Z_pT_normalised); scale(_h_Z_pT_xs, crossSection()/sumOfWeights()); } //@} private: /// @name Histogram Histo1DPtr _h_Z_pT_normalised; Histo1DPtr _h_Z_pT_xs; }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(D0_2010_S8671338); }