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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: EvtCBTo3piP00.cc | |
12 | // | |
13 | // Description: Routine to decay B+/-->pi0 pi0 pi+/- | |
14 | // and has CP violation. | |
15 | // | |
16 | // Modification history: | |
17 | // | |
18 | // RYD,Versille May 6, 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/EvtReport.hh" | |
28 | #include "EvtGenModels/EvtCBTo3piP00.hh" | |
29 | #include <string> | |
30 | ||
31 | //Below you will have do modify the declaration to be appropriate | |
32 | //for your new routine for the calculation of the amplitude | |
33 | ||
34 | #ifdef WIN32 | |
35 | extern "C" { | |
36 | extern void EVT3PIONSP00(double *,int *, | |
37 | double *, | |
38 | double *,double *, | |
39 | double *,double *, | |
40 | double *,double *,double *,double *); | |
41 | } | |
42 | #else | |
43 | extern "C" { | |
44 | extern void evt3pionsp00_(double *,int *, | |
45 | double *, | |
46 | double *,double *, | |
47 | double *,double *, | |
48 | double *,double *,double *,double *); | |
49 | } | |
50 | #endif | |
51 | ||
52 | EvtCBTo3piP00::~EvtCBTo3piP00() {} | |
53 | ||
54 | std::string EvtCBTo3piP00::getName(){ | |
55 | ||
56 | return "CB3PI-P00"; | |
57 | ||
58 | } | |
59 | ||
60 | ||
61 | EvtDecayBase* EvtCBTo3piP00::clone(){ | |
62 | ||
63 | return new EvtCBTo3piP00; | |
64 | ||
65 | } | |
66 | ||
67 | void EvtCBTo3piP00::init(){ | |
68 | ||
69 | // check that there are 1 argument | |
70 | checkNArg(1); | |
71 | checkNDaug(3); | |
72 | ||
73 | checkSpinParent(EvtSpinType::SCALAR); | |
74 | ||
75 | checkSpinDaughter(0,EvtSpinType::SCALAR); | |
76 | checkSpinDaughter(1,EvtSpinType::SCALAR); | |
77 | checkSpinDaughter(2,EvtSpinType::SCALAR); | |
78 | ||
79 | } | |
80 | ||
81 | ||
82 | ||
83 | void EvtCBTo3piP00::initProbMax(){ | |
84 | ||
85 | ||
86 | setProbMax(1.5); | |
87 | ||
88 | } | |
89 | ||
90 | ||
91 | void EvtCBTo3piP00::decay( EvtParticle *p ){ | |
92 | ||
93 | //added by Lange Jan4,2000 | |
94 | static EvtId BM=EvtPDL::getId("B-"); | |
95 | static EvtId BP=EvtPDL::getId("B+"); | |
96 | ||
97 | EvtParticle *pi1,*pi2,*pi3; | |
98 | ||
99 | p->makeDaughters(getNDaug(),getDaugs()); | |
100 | pi1=p->getDaug(0); | |
101 | pi2=p->getDaug(1); | |
102 | pi3=p->getDaug(2); | |
103 | ||
104 | EvtVector4R p4[3]; | |
105 | double alpha = getArg(0); | |
106 | int iset; | |
107 | static int first=1; | |
108 | ||
109 | if (first==1) { | |
110 | iset=10000; | |
111 | first=0; | |
112 | } | |
113 | else{ | |
114 | iset=0; | |
115 | } | |
116 | ||
117 | double p4pi1[4],p4Gamma11[4],p4Gamma12[4]; | |
118 | double p4Gamma21[4],p4Gamma22[4]; | |
119 | ||
120 | double realA,imgA,realbarA,imgbarA; | |
121 | ||
122 | evt3pionsp00_(&alpha,&iset, | |
123 | p4pi1, | |
124 | p4Gamma11,p4Gamma12, | |
125 | p4Gamma21,p4Gamma22, | |
126 | &realA,&imgA,&realbarA,&imgbarA); | |
127 | ||
128 | p4[0].set(p4pi1[3],p4pi1[0],p4pi1[1],p4pi1[2]); | |
129 | p4[1].set(p4Gamma11[3]+p4Gamma12[3], | |
130 | p4Gamma11[0]+p4Gamma12[0], | |
131 | p4Gamma11[1]+p4Gamma12[1], | |
132 | p4Gamma11[2]+p4Gamma12[2]); | |
133 | p4[2].set(p4Gamma21[3]+p4Gamma22[3], | |
134 | p4Gamma21[0]+p4Gamma22[0], | |
135 | p4Gamma21[1]+p4Gamma22[1], | |
136 | p4Gamma21[2]+p4Gamma22[2]); | |
137 | ||
138 | pi1->init( getDaug(0), p4[0] ); | |
139 | pi2->init( getDaug(1), p4[1] ); | |
140 | pi3->init( getDaug(2), p4[2] ); | |
141 | ||
142 | EvtComplex A(realA,imgA); | |
143 | EvtComplex Abar(realbarA, imgbarA); | |
144 | ||
145 | EvtComplex amp; | |
146 | if(p->getId()==BP) | |
147 | { | |
148 | amp = A; | |
149 | } | |
150 | if(p->getId()==BM) | |
151 | { | |
152 | amp = Abar; | |
153 | } | |
154 | ||
155 | vertex(amp); | |
156 | ||
157 | return ; | |
158 | } | |
159 |