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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/DISFinalState.hh"
namespace Rivet {
/// @brief Measurement of $D^{\pm}$ and $D^0$ production in deep inelastic scattering using a lifetime tag at HERA
/// @author Andrii Verbytskyi
class ZEUS_2008_I810112 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(ZEUS_2008_I810112);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
/// Initialise and register projections
FinalState fs;
const DISKinematics& diskin = DISKinematics();
declare(diskin,"Kinematics");
declare(UnstableParticles(), "UPS");
book(_h_Dp_q2, 3, 1, 1);
book(_h_Dp_x, 4, 1, 1);
book(_h_Dp_pt, 5, 1, 1);
book(_h_Dp_eta, 6, 1, 1);
book(_h_Dp_yinq2[0], "TMP/Dp0", refData( 11, 1, 1));
book(_h_Dp_yinq2[1], "TMP/Dp1", refData( 11, 1, 2));
book(_h_Dp_yinq2[2], "TMP/Dp2", refData( 11, 1, 3));
book(_s_Dp_yinq2[0], 11, 1, 1);
book(_s_Dp_yinq2[1], 11, 1, 2);
book(_s_Dp_yinq2[2], 11, 1, 3);
book(_h_D0_q2, 7, 1, 1);
book(_h_D0_x, 8, 1, 1);
book(_h_D0_pt, 9, 1, 1);
book(_h_D0_eta, 10, 1, 1);
book(_h_D0_yinq2[0], "TMP/D00", refData( 12, 1, 1));
book(_h_D0_yinq2[1], "TMP/D01", refData( 12, 1, 2));
book(_h_D0_yinq2[2], "TMP/D02", refData( 12, 1, 3));
book(_s_D0_yinq2[0], 12, 1, 1);
book(_s_D0_yinq2[1], 12, 1, 2);
book(_s_D0_yinq2[2], 12, 1, 3);
}
/// A routine that selects the bin in kinematic space
int _getbinQ2_OK(const DISKinematics& dk) {
if (inRange(dk.Q2()/GeV2, 5.0, 9.0)) return 0;
if (inRange(dk.Q2()/GeV2, 9.0, 44.0)) return 1;
if (inRange(dk.Q2()/GeV2, 44.0, 1000.0)) return 2;
return -1;
}
/// Perform the per-event analysis
void analyze(const Event& event) {
/// DIS kinematics
const DISKinematics& dk = apply<DISKinematics>(event, "Kinematics");
double q2 = dk.Q2();
double x = dk.x();
double y = dk.y();
///Assure the event falls into the kinematic range of the measurement.
if (!inRange(q2/GeV2, 5, 1000)) vetoEvent;
if (!inRange(y, 0.02, 0.7)) vetoEvent;
/// Find out in which bin the measurement falls.
int bin = _getbinQ2_OK(dk);
if ( bin < 0 ) vetoEvent;
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UPS");
/// Get \f$D^0$\f particles
for (const Particle& p : filter_select(ufs.particles(), Cuts::abspid == PID::D0)) {
///But not not from \f$D^{*\pm}$\f decays
if (p.hasAncestor(PID::DSTARPLUS)) continue;
if (p.hasAncestor(PID::DSTARMINUS)) continue;
/// Select particles only in the \f$\eta-p_{T}$\f region
if (!inRange(p.eta(), -1.6, 1.6)) continue;
if (!inRange(p.pt()/GeV, 1.5, 15.0)) continue;
/// Fill the general histograms
_h_D0_pt->fill(p.pt()/GeV);
_h_D0_eta->fill(p.eta());
_h_D0_q2->fill(q2/GeV2);
_h_D0_x->fill(x);
/// Fill the cross-sections in selected kinematic bins
_h_D0_yinq2[bin]->fill(y);
}
/// Get \f$D^{\pm}$\f particles
for (const Particle& p : filter_select(ufs.particles(), Cuts::abspid == PID::DPLUS)) {
/// Select particles only in the \f$\eta-p_{T}$\f region
if (!inRange(p.eta(), -1.6, 1.6)) continue;
if (!inRange(p.pt()/GeV, 1.5, 15.0)) continue;
/// Fill the general histograms
_h_Dp_pt->fill(p.pt()/GeV);
_h_Dp_eta->fill(p.eta());
_h_Dp_q2->fill(q2/GeV2);
_h_Dp_x->fill(x);
/// Fill the cross-sections in selected kinematic bins
_h_Dp_yinq2[bin]->fill(y);
}
}
/// Normalise histograms etc., after the run
void finalize() {
const double sf = crossSection()/nanobarn/sumOfWeights();
/// For CS comparison the MC should be corrected to difference between BR used for data and in MC
scale(_h_Dp_pt, sf);
scale(_h_Dp_eta, sf);
scale(_h_Dp_q2, sf);
scale(_h_Dp_x, sf);
for (size_t i = 0; i < 3; i++) {
scale(_h_Dp_yinq2[i], sf);
barchart(_h_Dp_yinq2[i], _s_Dp_yinq2[i], false);
}
scale(_h_D0_pt, sf);
scale(_h_D0_eta, sf);
scale(_h_D0_q2, sf);
scale(_h_D0_x, sf);
for (size_t i = 0; i < 3; i++) {
scale(_h_D0_yinq2[i], sf);
barchart(_h_D0_yinq2[i], _s_D0_yinq2[i], false);
}
}
///@}
private:
Histo1DPtr
_h_D0_pt,
_h_D0_eta,
_h_D0_q2,
_h_D0_x,
_h_D0_yinq2[3];
Histo1DPtr
_h_Dp_pt,
_h_Dp_eta,
_h_Dp_q2,
_h_Dp_x,
_h_Dp_yinq2[3];
Scatter2DPtr _s_Dp_yinq2[3];
Scatter2DPtr _s_D0_yinq2[3];
};
/// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ZEUS_2008_I810112);
}
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