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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: EvtISGW.cc | |
12 | // | |
13 | // Description: Routine to implement semileptonic decays according | |
14 | // to the model ISGW | |
15 | // | |
16 | // Modification history: | |
17 | // | |
18 | // DJL/RYD September 25, 1996 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/EvtISGW.hh" | |
29 | #include <string> | |
30 | #include "EvtGenModels/EvtISGWFF.hh" | |
31 | #include "EvtGenBase/EvtSemiLeptonicScalarAmp.hh" | |
32 | #include "EvtGenBase/EvtSemiLeptonicVectorAmp.hh" | |
33 | #include "EvtGenBase/EvtSemiLeptonicTensorAmp.hh" | |
34 | ||
35 | EvtISGW::~EvtISGW() {} | |
36 | ||
37 | std::string EvtISGW::getName(){ | |
38 | ||
39 | return "ISGW"; | |
40 | ||
41 | } | |
42 | ||
43 | ||
44 | EvtDecayBase* EvtISGW::clone(){ | |
45 | ||
46 | return new EvtISGW; | |
47 | ||
48 | } | |
49 | ||
50 | void EvtISGW::decay( EvtParticle *p ){ | |
51 | ||
52 | ||
53 | p->initializePhaseSpace(getNDaug(),getDaugs()); | |
54 | ||
55 | calcamp->CalcAmp(p,_amp2,isgwffmodel); | |
56 | return; | |
57 | ||
58 | } | |
59 | ||
60 | ||
61 | void EvtISGW::init(){ | |
62 | ||
63 | checkNArg(0); | |
64 | checkNDaug(3); | |
65 | ||
66 | ||
67 | //We expect the parent to be a scalar | |
68 | //and the daughters to be X lepton neutrino | |
69 | ||
70 | EvtSpinType::spintype mesontype=EvtPDL::getSpinType(getDaug(0)); | |
71 | ||
72 | checkSpinParent(EvtSpinType::SCALAR); | |
73 | checkSpinDaughter(1,EvtSpinType::DIRAC); | |
74 | checkSpinDaughter(2,EvtSpinType::NEUTRINO); | |
75 | ||
76 | ||
77 | isgwffmodel = new EvtISGWFF; | |
78 | ||
79 | if ( mesontype==EvtSpinType::SCALAR ) { | |
80 | calcamp = new EvtSemiLeptonicScalarAmp; | |
81 | } | |
82 | if ( mesontype==EvtSpinType::VECTOR ) { | |
83 | calcamp = new EvtSemiLeptonicVectorAmp; | |
84 | } | |
85 | if ( mesontype==EvtSpinType::TENSOR ) { | |
86 | calcamp = new EvtSemiLeptonicTensorAmp; | |
87 | } | |
88 | ||
89 | } | |
90 |