1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Upslion production at 7 TeV
 9  class LHCB_2012_I1091071 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(LHCB_2012_I1091071);
14
15
16    /// @name Analysis methods
17    /// @{
18
19    /// Book histograms and initialise projections before the run
20    void init() {
21      declare(UnstableParticles(), "UFS");
22      for(unsigned int ix=0;ix<3;++ix) {
23        book(_h_Ups[ix],{2.0,2.5,3.0,3.5,4.0,4.5});
24	for(unsigned int iy=0;iy<5;++iy) {
25          book(_h_Ups[ix]->bin(1+iy),2+iy+5*ix,1,1);
26	}
27	book(_h_Ups_pT[ix],"TMP/Ups_"+toString(ix),refData(17,1,1));
28      }
29    }
30
31
32    /// Perform the per-event analysis
33    void analyze(const Event& event) {
34      // Final state of unstable particles to get particle spectra
35      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
36      // upsilon
37      for (const Particle& p : ufs.particles(Cuts::pid==553 or Cuts::pid==100553 or Cuts::pid==200553)) {
38        double absrap = p.absrap();
39        double xp = p.perp();
40	if(absrap<2. || absrap>4.5) continue;
41	unsigned int iups=p.pid()/100000;
42	_h_Ups_pT[iups]  ->fill(xp);
43	_h_Ups[iups]     ->fill(absrap,xp);	
44      }
45    }
46
47
48    /// Normalise histograms etc., after the run
49    void finalize() {
50      // 1/2 due rapidity folding +/-
51      double factor = 0.5*crossSection()/picobarn/sumOfWeights();
52      // branching ratios for upsilon
53      vector<double> br = {0.0248,0.0193,0.0218};
54      for(unsigned int ix=0;ix<3;++ix) {
55	scale(_h_Ups_pT  [ix],factor*br[ix]);
56	scale(_h_Ups[ix],factor*br[ix]);
57        divByGroupWidth(_h_Ups[ix]);
58      }
59      for(unsigned int ix=0;ix<2;++ix) {
60	Estimate1DPtr tmp;
61	book(tmp,17,1,1+ix);
62	divide(_h_Ups_pT[ix+1],_h_Ups_pT[0],tmp);
63      }
64    }
65
66    /// @}
67
68
69    /// @name Histograms
70    /// @{
71    Histo1DPtr _h_Ups_pT[3];
72    Histo1DGroupPtr _h_Ups[3];
73    /// @}
74
75
76  };
77
78
79  RIVET_DECLARE_PLUGIN(LHCB_2012_I1091071);
80
81}