Rivet analyses referenceCLEOIII_2004_I627327Mass distributions in $\Xi_c^-\to pK^-K^-\pi^+$Experiment: CLEOIII (CESR) Inspire ID: 627327 Status: VALIDATED NOHEPDATA Authors:
Beam energies: ANY Run details:
Measurement of the mass distributions in the decay $\Xi_c^-\to pK^-K^-\pi^+$ by CLEOIII. The data were read from the plots in the paper. Source code: CLEOIII_2004_I627327.cc 1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/UnstableParticles.hh"
4#include "Rivet/Projections/DecayedParticles.hh"
5
6namespace Rivet {
7
8
9 /// @brief Xi_c0 -> p K- K- pi+
10 class CLEOIII_2004_I627327 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(CLEOIII_2004_I627327);
15
16
17 /// @name Analysis methods
18 /// @{
19
20 /// Book histograms and initialise projections before the run
21 void init() {
22 // Initialise and register projections
23 UnstableParticles ufs = UnstableParticles(Cuts::abspid==4132);
24 declare(ufs, "UFS");
25 DecayedParticles XIC0(ufs);
26 XIC0.addStable(PID::PI0);
27 XIC0.addStable(PID::K0S);
28 XIC0.addStable(PID::ETA);
29 declare(XIC0, "XIC0");
30 // histograms
31 book(_h,1,1,1);
32 }
33
34
35 /// Perform the per-event analysis
36 void analyze(const Event& event) {
37 static const map<PdgId,unsigned int> & mode = { { PID::KMINUS,2}, { 2212,1}, { PID::PIPLUS ,1}};
38 static const map<PdgId,unsigned int> & modeCC = { { PID::KPLUS ,2}, {-2212,1}, { PID::PIMINUS,1}};
39 DecayedParticles XIC0 = apply<DecayedParticles>(event, "XIC0");
40 // loop over particles
41 for(unsigned int ix=0;ix<XIC0.decaying().size();++ix) {
42 int sign = 1;
43 if (XIC0.decaying()[ix].pid()>0 && XIC0.modeMatches(ix,4,mode)) {
44 sign=1;
45 }
46 else if (XIC0.decaying()[ix].pid()<0 && XIC0.modeMatches(ix,4,modeCC)) {
47 sign=-1;
48 }
49 else
50 continue;
51 const Particle & pip = XIC0.decayProducts()[ix].at( sign*PID::PIPLUS)[0];
52 const Particles & Km = XIC0.decayProducts()[ix].at( sign*PID::KMINUS);
53 for(unsigned int ix=0;ix<2;++ix)
54 _h->fill((pip.momentum()+Km[ix].momentum()).mass());
55 }
56 }
57
58
59 /// Normalise histograms etc., after the run
60 void finalize() {
61 normalize(_h,1.,false);
62 }
63
64 /// @}
65
66
67 /// @name Histograms
68 /// @{
69 Histo1DPtr _h;
70 /// @}
71
72
73 };
74
75
76 RIVET_DECLARE_PLUGIN(CLEOIII_2004_I627327);
77
78}
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