Rivet analyses referenceARGUS_1993_I340585$q^2$ spectrum in $\bar{B}^0\to D^{*+}\ell^-\bar\nu_\ell$Experiment: ARGUS (DORIS) Inspire ID: 340585 Status: VALIDATED NOHEPDATA Authors:
Beam energies: ANY Run details:
$q^2$ spectrum in $\bar{B}^0\to D^{*+}\ell^-\bar\nu_\ell$. Corrected data read from figure 7. Source code: ARGUS_1993_I340585.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 B -> D* l nu
10 class ARGUS_1993_I340585 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(ARGUS_1993_I340585);
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==511);
24 declare(ufs, "UFS");
25 DecayedParticles BB(ufs);
26 BB.addStable(411); BB.addStable(-411);
27 BB.addStable(421); BB.addStable(-421);
28 BB.addStable(413); BB.addStable(-413);
29 BB.addStable(423); BB.addStable(-423);
30 BB.addStable(PID::PI0);
31 declare(BB, "BB");
32 // histos
33 book(_h, 1,1,1);
34 book(_c, "TMP/nB");
35 }
36
37
38 /// Perform the per-event analysis
39 void analyze(const Event& event) {
40 // loop over B mesons
41 DecayedParticles BB = apply<DecayedParticles>(event, "BB");
42 // loop over particles
43 for (unsigned int ix=0; ix<BB.decaying().size(); ++ix) {
44 _c->fill();
45 for (unsigned int il=0; il < 4; ++il) {
46 if (BB.modeMatches(ix,3,mode[il])) {
47 int sign = il%2==0 ? -1 : 1;
48 const Particle& DD = BB.decayProducts()[ix].at(sign*413)[0];
49 FourMomentum qq = BB.decaying()[ix].mom() - DD.mom();
50 _h->fill(qq.mass2());
51 }
52 }
53 }
54 }
55
56
57 /// Normalise histograms etc., after the run
58 void finalize() {
59 scale(_h, 0.5/ *_c);
60 }
61
62 /// @}
63
64
65 /// @name Histograms
66 /// @{
67 Histo1DPtr _h;
68 CounterPtr _c;
69 const map<PdgId,unsigned int> mode[4] = {{ {-413,1}, {-11,1}, { 12,1}},
70 { { 413,1}, { 11,1}, {-12,1}},
71 { {-413,1}, {-13,1}, { 14,1}},
72 { { 413,1}, { 13,1}, {-14,1}}};
73 /// @}
74
75
76 };
77
78
79 RIVET_DECLARE_PLUGIN(ARGUS_1993_I340585);
80
81}
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