rivet is hosted by Hepforge, IPPP Durham

Rivet analyses reference

ARGUS_1989_I282570

Spectrum for $D^+_{s1}(2536)$ production at 10. GeV
Experiment: ARGUS (DORIS)
Inspire ID: 282570
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Lett. B230 (1989) 162
Beams: e+ e-
Beam energies: (5.0, 5.0) GeV
Run details:
  • e+e- to hadrons

Spectrum for $D^+_{s1}(2536)$ production at 10. GeV measured by ARGUS.

Source code: ARGUS_1989_I282570.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 Spectrum for D_s1 
10  class ARGUS_1989_I282570 : public Analysis {
11  public:
12
13    /// Constructor
14    RIVET_DEFAULT_ANALYSIS_CTOR(ARGUS_1989_I282570);
15
16
17    /// @name Analysis methods
18    ///@{
19
20    /// Book histograms and initialise projections before the run
21    void init() {
22      // projections
23      declare(Beam(), "Beams");
24      declare(UnstableParticles(), "UFS");
25      // book histos
26      book(_h_rate1 ,1,1,1);
27      book(_h_rate2 ,1,1,2);
28      book(_h_x     ,2,1,1);
29    }
30
31    bool isK0(int id) {
32      return id==310 || id==130 || abs(id)==311;
33    }
34
35
36    /// Perform the per-event analysis
37    void analyze(const Event& event) {
38      static const int DsID = 20433;
39      // Get beams and average beam momentum
40      const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
41      const double Emax = ( beams.first.p3().mod() + beams.second.p3().mod() ) / 2.0;
42      const double Pmax = sqrt(sqr(Emax)-sqr(2.535));
43      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
44      for (const Particle& p : ufs.particles(Cuts::abspid==DsID)) {
45	double xp = p.momentum().p3().mod()/Pmax;
46        _h_x->fill(xp);
47	if(p.children().size()!=2) continue;
48	int sign = p.pid()/DsID;
49	if(p.children()[0].pid()==sign*413 &&
50	   isK0(p.children()[1].pid())) {
51	  _h_rate1->fill(10.);
52	  _h_rate2->fill(10.);
53	}
54	else if (p.children()[1].pid()==sign*413 &&
55		 isK0(p.children()[0].pid())) {
56	  _h_rate1->fill(10.);
57	  _h_rate2->fill(10.);
58	}
59	else if(p.children()[0].pid()==sign*423 &&
60		p.children()[1].pid()==sign*321) {
61	  _h_rate2->fill(10.);
62	}
63	else if(p.children()[1].pid()==sign*423 &&
64		p.children()[0].pid()==sign*321) {
65	  _h_rate2->fill(10.);
66	}
67      }
68    }
69
70
71    /// Normalise histograms etc., after the run
72    void finalize() {
73      normalize(_h_x     );
74      scale(_h_rate1,crossSection()/sumOfWeights()/picobarn);
75      scale(_h_rate2,crossSection()/sumOfWeights()/picobarn);
76    }
77
78    ///@}
79
80
81    /// @name Histograms
82    ///@{
83    Histo1DPtr _h_x,_h_rate1,_h_rate2;
84    ///@}
85
86
87  };
88
89
90  RIVET_DECLARE_PLUGIN(ARGUS_1989_I282570);
91
92}