1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief rho0, K*=, K*0 spectra at 29 GeV
 9  class HRS_1989_I276948 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(HRS_1989_I276948);
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      book(_h_x_rho   ,1,1,1);
23      book(_h_x_Kstar0,2,1,1);
24      book(_h_x_Kstarp,2,1,2);
25      book(_h_sig_rho    ,3,1,1);
26      book(_h_sig_Kstar0 ,4,1,1);
27      book(_h_mult_rho   ,3,1,3);
28      book(_h_mult_Kstar0,4,1,3);
29    }
30
31
32    /// Perform the per-event analysis
33    void analyze(const Event& event) {
34      UnstableParticles ufs = apply<UnstableParticles>(event,"UFS");
35      for(const Particle & p : ufs.particles(Cuts::abspid==113 ||
36					     Cuts::abspid==323 ||
37					     Cuts::abspid==313)) {
38      	Vector3 mom3 = p.p3();
39        const double energy = p.E();
40      	double modp = mom3.mod();
41      	double beta = modp/energy;
42      	double xE = 2.*modp/sqrtS();
43	if(p.pid()==113) {
44	  _h_x_rho->fill(xE,1./beta);
45	  _h_sig_rho->fill(sqrtS());
46	  _h_mult_rho->fill(sqrtS());
47	}
48	else if(p.pid()==313) {
49	  _h_x_Kstar0->fill(xE,1./beta);
50	  _h_sig_Kstar0->fill(sqrtS());
51	  _h_mult_Kstar0->fill(sqrtS());
52	}
53	else {
54	  _h_x_Kstarp->fill(xE,1./beta);
55	}
56      }
57    }
58
59
60    /// Normalise histograms etc., after the run
61    void finalize() {
62      scale( _h_x_rho   , sqr(sqrtS())*crossSection()/microbarn/sumOfWeights());
63      scale( _h_x_Kstar0, sqr(sqrtS())*crossSection()/microbarn/sumOfWeights());
64      scale( _h_x_Kstarp, sqr(sqrtS())*crossSection()/microbarn/sumOfWeights());
65      scale( _h_sig_rho   , crossSection()/picobarn/sumOfWeights());
66      scale( _h_sig_Kstar0, crossSection()/picobarn/sumOfWeights());
67      scale( _h_mult_rho   , 1./sumOfWeights());
68      scale( _h_mult_Kstar0, 1./sumOfWeights());
69    }
70
71    ///@}
72
73
74    /// @name Histograms
75    ///@{
76    Histo1DPtr _h_x_rho,_h_x_Kstar0,_h_x_Kstarp;
77    Histo1DPtr _h_sig_rho,_h_sig_Kstar0;
78    Histo1DPtr _h_mult_rho,_h_mult_Kstar0;
79    ///@}
80
81
82  };
83
84
85  RIVET_DECLARE_PLUGIN(HRS_1989_I276948);
86
87}