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da0e9ce3 | 1 | //-------------------------------------------------------------------------- |
2 | // | |
3 | // Environment: | |
4 | // This software is part of the EvtGen package developed jointly | |
5 | // for the BaBar and CLEO collaborations. If you use all or part | |
6 | // of it, please give an appropriate acknowledgement. | |
7 | // | |
8 | // Copyright Information: See EvtGen/COPYRIGHT | |
9 | // Copyright (C) 1998 Caltech, UCSB | |
10 | // | |
11 | // Module: EvtTVSPwave.cc | |
12 | // | |
13 | // Description: Routine to decay tensor-> vector scalar | |
14 | // by specifying the partial waves | |
15 | // | |
16 | // Modification history: | |
17 | // | |
18 | // DJL/RYD August 11, 1997 Module created | |
19 | // | |
20 | //------------------------------------------------------------------------ | |
21 | // | |
22 | #include "EvtGenBase/EvtPatches.hh" | |
23 | #include <stdlib.h> | |
24 | #include "EvtGenBase/EvtParticle.hh" | |
25 | #include "EvtGenBase/EvtGenKine.hh" | |
26 | #include "EvtGenBase/EvtPDL.hh" | |
27 | #include "EvtGenBase/EvtVector4C.hh" | |
28 | #include "EvtGenBase/EvtTensor4C.hh" | |
29 | #include "EvtGenBase/EvtReport.hh" | |
30 | #include "EvtGenModels/EvtTVSPwave.hh" | |
31 | #include <string> | |
32 | ||
33 | EvtTVSPwave::~EvtTVSPwave() {} | |
34 | ||
35 | std::string EvtTVSPwave::getName(){ | |
36 | ||
37 | return "TVS_PWAVE"; | |
38 | ||
39 | } | |
40 | ||
41 | ||
42 | EvtDecayBase* EvtTVSPwave::clone(){ | |
43 | ||
44 | return new EvtTVSPwave; | |
45 | ||
46 | } | |
47 | ||
48 | void EvtTVSPwave::init(){ | |
49 | ||
50 | // check that there are 6 arguments | |
51 | checkNArg(6); | |
52 | checkNDaug(2); | |
53 | ||
54 | checkSpinParent(EvtSpinType::TENSOR); | |
55 | ||
56 | checkSpinDaughter(0,EvtSpinType::VECTOR); | |
57 | checkSpinDaughter(1,EvtSpinType::SCALAR); | |
58 | } | |
59 | ||
60 | void EvtTVSPwave::initProbMax(){ | |
61 | ||
62 | setProbMax(0.5); | |
63 | ||
64 | ||
65 | } | |
66 | ||
67 | void EvtTVSPwave::decay( EvtParticle *p ){ | |
68 | ||
69 | EvtComplex ap(getArg(0)*cos(getArg(1)),getArg(0)*sin(getArg(1))); | |
70 | EvtComplex ad(getArg(2)*cos(getArg(3)),getArg(2)*sin(getArg(3))); | |
71 | EvtComplex af(getArg(4)*cos(getArg(5)),getArg(4)*sin(getArg(5))); | |
72 | ||
73 | if (ap!=EvtComplex(0.0,0.0)||af!=EvtComplex(0.0,0.0)) { | |
74 | report(ERROR,"EvtGen") << "dfslkh8945wqh:In EvtTensorToVectorScalar.c\n"; | |
75 | report(ERROR,"EvtGen") << "P or F wave not yet implemented!! (ryd) \n"; | |
76 | } | |
77 | ||
78 | p->initializePhaseSpace(getNDaug(),getDaugs()); | |
79 | ||
80 | EvtParticle *v; | |
81 | v = p->getDaug(0); | |
82 | EvtVector4R momv = v->getP4(); | |
83 | double massv = v->mass(); | |
84 | ||
85 | EvtComplex temp; | |
86 | temp = ad; | |
87 | double m_parent = p->mass(); | |
88 | ||
89 | EvtVector4R p_parent; | |
90 | ||
91 | p_parent.set(m_parent,0.0,0.0,0.0); | |
92 | ||
93 | EvtVector4C pep0,pep1,pep2,pep3,pep4; | |
94 | EvtTensor4C pdual; | |
95 | ||
96 | EvtVector4C epsdual0,epsdual1,epsdual2; | |
97 | ||
98 | double norm=massv/(m_parent*momv.get(0)*momv.d3mag()*momv.d3mag()); | |
99 | pdual=dual(directProd(norm*p_parent,momv)); | |
100 | ||
101 | epsdual0=pdual.cont1(v->epsParent(0).conj()); | |
102 | epsdual1=pdual.cont1(v->epsParent(1).conj()); | |
103 | epsdual2=pdual.cont1(v->epsParent(2).conj()); | |
104 | ||
105 | pep0=p->epsTensor(0).cont1(momv); | |
106 | pep1=p->epsTensor(1).cont1(momv); | |
107 | pep2=p->epsTensor(2).cont1(momv); | |
108 | pep3=p->epsTensor(3).cont1(momv); | |
109 | pep4=p->epsTensor(4).cont1(momv); | |
110 | ||
111 | vertex(0,0,pep0*epsdual0); | |
112 | vertex(1,0,pep1*epsdual0); | |
113 | vertex(2,0,pep2*epsdual0); | |
114 | vertex(3,0,pep3*epsdual0); | |
115 | vertex(4,0,pep4*epsdual0); | |
116 | ||
117 | vertex(0,1,pep0*epsdual1); | |
118 | vertex(1,1,pep1*epsdual1); | |
119 | vertex(2,1,pep2*epsdual1); | |
120 | vertex(3,1,pep3*epsdual1); | |
121 | vertex(4,1,pep4*epsdual1); | |
122 | ||
123 | vertex(0,2,pep0*epsdual2); | |
124 | vertex(1,2,pep1*epsdual2); | |
125 | vertex(2,2,pep2*epsdual2); | |
126 | vertex(3,2,pep3*epsdual2); | |
127 | vertex(4,2,pep4*epsdual2); | |
128 | ||
129 | return ; | |
130 | } | |
131 |