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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief Add a short analysis description here
class ALICE_2017_I1511870 : public Analysis {
public:
/// Constructor
DEFAULT_RIVET_ANALYSIS_CTOR(ALICE_2017_I1511870);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(UnstableParticles(), "UFS");
// Book histograms
book(_h_D0,1, 1, 1); // production cross section of D0 meson
book(_h_Dplus,2, 1, 1); // production cross section of Dplus meson
book(_h_Dstar,3, 1, 1); // production cross section of Dstar meson
book(_h_Ds,4, 1, 1); // production cross section of Ds meson
book(_h_DplusonD0,5, 1, 1); // ratio of production cross section between Dplus and D0
book(_h_DstaronD0,6, 1, 1); // ratio of production cross section between Dstar and D0
book(_h_DsonD0,7, 1, 1); // ratio of production cross section between Ds and D0
book(_h_DsonDplus,8, 1, 1); // ratio of production cross section between Ds and Dplus
book(_h_D0int,9,1,1); // pt-integrated production cross section of D0 meson
book(_h_Dplusint,10,1,1); // pt-integrated production cross section of Dplus meson
book(_h_Dstarint,11,1,1); // pt-integrated production cross section of Dstar meson
book(_h_Dsint,12,1,1); // pt-integrated production cross section of Ds meson
book(_h_cc,13,1,1); // integrated cross section of ccbar
book(_h_ptd0,14,1,1); // mean pt of prompt D0
book(_h_D0full,15,1,1); // integrated cross section for D0 in full rapidity
book(_h_ccfull,16,1,1); // integrated cross section for ccbar in full rapidity
book(_h_wei,"_h_wei"); // Counter used to calculate D0 mean pt (necessary to store an integer number for event normalisation, i.e. to still be able to compute <pT> from multiple parallel MC jobs)
book(_h_D0dummy,"TMP/_h_D0dummy",refData(5,1,1)); // used to make DplusonD0
book(_h_D0dummy1,"TMP/_h_D0dummy1",refData(7,1,1)); // used to make DsonD0
book(_h_Dplusdummy,"TMP/_h_Dplusdummy",refData(8,1,1)); // used to make DsonDplus
}
/// Perform the per-event analysis
/*PDG code IDs used inside the foreach cycle: 421 = D0, 411 = D+, 413 = D*+, 431 = Ds+ */
void analyze(const Event& event) {
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
for(const Particle& p : ufs.particles()) {
if(p.abspid() == 421){
if(not p.fromBottom()){
_h_D0full ->fill(7.000000e+03/GeV);
_h_ccfull ->fill(7.000000e+03/GeV);}
}
if(p.absrap() < 0.5){
if(p.fromBottom())
continue;
else
{
if(p.abspid() == 421){
_h_D0 ->fill(p.pT()/GeV);
_h_D0dummy ->fill(p.pT()/GeV);
_h_D0dummy1 ->fill(p.pT()/GeV);
_h_D0int ->fill(7.000000e+03/GeV);
_h_cc ->fill(7.000000e+03/GeV);
_h_ptd0 ->fill(7.000000e+03/GeV,p.pT()/GeV);
_h_wei ->fill();
}
else if(p.abspid() == 411){
_h_Dplus ->fill(p.pT()/GeV);
_h_Dplusdummy ->fill(p.pT()/GeV);
_h_Dplusint ->fill(7.000000e+03/GeV);
}
else if(p.abspid() == 413){
_h_Dstar ->fill(p.pT()/GeV);
_h_Dstarint ->fill(7.000000e+03/GeV);
}
else if(p.abspid() == 431){
_h_Ds ->fill(p.pT()/GeV);
_h_Dsint ->fill(7.000000e+03/GeV);
}
}
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
//normalize(_h_YYYY); // normalize to unity
//all the histograms are divided by 2 since at this point the results consider both particles and antiparticles
scale(_h_D0, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_Dplus, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_Dstar, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_Ds, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_D0dummy, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_D0dummy1, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_Dplusdummy, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
divide(_h_Dplus, _h_D0dummy, _h_DplusonD0); //ratio plots
divide(_h_Dstar, _h_D0dummy, _h_DstaronD0);
divide(_h_Ds, _h_D0dummy1, _h_DsonD0);
divide(_h_Ds, _h_Dplusdummy, _h_DsonDplus);
scale(_h_D0int, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_Dplusint, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_Dstarint, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_Dsint, crossSection()/(microbarn*2*sumOfWeights())); // norm to cross section
scale(_h_cc, 1.034*crossSection()/(microbarn*2*sumOfWeights()*0.542));
// 0.542 accounts for the fraction of charm quarks hadronizing into D0 mesons, the ALICE uncertainty on such a factor (0.542 ± 0.024) is not propagated here.
// 1.034 is used to include the correction of the different shapes of the rapidity distributions of D0 and ccbar, the ALICE uncertainty on such a factor (1.034 ± 0.015, i.e. 1.5 percentage point of uncertainty) is not propagated here.
if( _h_wei->effNumEntries()!=0.) scale(_h_ptd0, 1/ _h_wei->val()); //scaled for the number of events used to calculate the mean pT
scale(_h_D0full, crossSection()/(millibarn*2*sumOfWeights()));
// NOTE : for the ALICE data, the y extrapolation from |y|<0.5 to full-y phase space is done with an FONLL-based factor (8.56 +2.51 -0.42). Here in MC we simply use direct MC outcome over full y.
scale(_h_ccfull, 1.034*crossSection()/(millibarn*2*sumOfWeights()*0.542));
// 0.542 accounts for the fraction of charm quarks hadronizing into D0 mesons, the ALICE uncertainty on such a factor (0.542 ± 0.024) is not propagated here.
// 1.034 is used to include the correction of the different shapes of the rapidity distributions of D0 and ccbar, the ALICE uncertainty on such a factor (1.034 ± 0.016, i.e. 1.5 percentage point of uncertainty) is not propagated here.
}
//@}
/// @name Histograms
//@{
CounterPtr _h_wei;
Histo1DPtr _h_D0, _h_Dplus, _h_Dstar, _h_Ds, _h_D0int, _h_Dplusint, _h_Dstarint, _h_Dsint, _h_cc, _h_D0full, _h_D0dummy, _h_D0dummy1, _h_Dplusdummy , _h_ccfull, _h_ptd0;
Scatter2DPtr _h_DplusonD0, _h_DstaronD0, _h_DsonD0, _h_DsonDplus;
//@}
};
// The hook for the plugin system
DECLARE_RIVET_PLUGIN(ALICE_2017_I1511870);
}
|