Rivet analyses referenceCLEOII_1996_I416471Spectrum for $\Xi_c^{*+}$ production at 10.58 GeVExperiment: CLEOII (CESR) Inspire ID: 416471 Status: VALIDATED Authors:
Beam energies: (5.3, 5.3) GeV Run details:
Spectrum for $\Xi_c^{*+}$ production at 10.58 GeV measured by CLEOII. Source code: CLEOII_1996_I416471.cc 1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/Beam.hh"
4#include "Rivet/Projections/UnstableParticles.hh"
5
6namespace Rivet {
7
8
9 /// @brief Xi_c*+ spectrum
10 class CLEOII_1996_I416471 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(CLEOII_1996_I416471);
15
16
17 /// @name Analysis methods
18 /// @{
19 /// Book histograms and initialise projections before the run
20 void init() {
21 // projections
22 declare(Beam(), "Beams");
23 declare(UnstableParticles(), "UFS");
24 // book histos
25 book(_h_x,2,1,1);
26 book(_r,3,1,1);
27 book(_c_xi,"TMP/c_xi");
28 }
29
30 // Check for explicit decay into pdgids
31 bool isDecay(const Particle& mother, vector<int> ids) {
32 if(mother.pid()<0) {
33 for(unsigned int ix=0;ix<ids.size();++ix)
34 ids[ix] *= -1;
35 }
36 // Trivial check to ignore any other decays but the one in question modulo photons
37 const Particles children = mother.children(Cuts::pid!=PID::PHOTON);
38 if (children.size()!=ids.size()) return false;
39 // Check for the explicit decay
40 return all(ids, [&](int i){return count(children, hasPID(i))==1;});
41 }
42
43 /// Perform the per-event analysis
44 void analyze(const Event& event) {
45 static const int idXi = 4324;
46 const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
47 const double Emax = ( beams.first.p3().mod() + beams.second.p3().mod() ) / 2.0;
48 const double Pmax = sqrt(sqr(Emax)-sqr(2.645));
49 const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
50 for (const Particle& p : ufs.particles(Cuts::abspid==idXi)) {
51 double xp = p.momentum().p3().mod()/Pmax;
52 _h_x->fill(xp);
53 int sign = p.pid()/p.abspid();
54 if(isDecay(p,{sign*4132,sign*211})) {
55 _r->fill("10.58"s);
56 }
57 }
58 unsigned int nxi = ufs.particles(Cuts::abspid==4132).size();
59 _c_xi->fill(nxi);
60 }
61
62
63 /// Normalise histograms etc., after the run
64 void finalize() {
65 normalize(_h_x,1,false);
66 scale(_r, 1./ *_c_xi);
67 }
68
69 /// @}
70
71
72 /// @name Histograms
73 /// @{
74 Histo1DPtr _h_x;
75 BinnedHistoPtr<string> _r;
76 CounterPtr _c_xi;
77 /// @}
78
79
80 };
81
82
83 RIVET_DECLARE_PLUGIN(CLEOII_1996_I416471);
84
85}
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