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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: EvtTSS.cc | |
12 | // | |
13 | // Description: Routine to decay tensor-> scalar scalar | |
14 | // | |
15 | // Modification history: | |
16 | // | |
17 | // RYD November 24, 1996 Module created | |
18 | // | |
19 | //------------------------------------------------------------------------ | |
20 | // | |
21 | // | |
22 | #include "EvtGenBase/EvtPatches.hh" | |
23 | #include <stdlib.h> | |
24 | #include "EvtGenBase/EvtVector4C.hh" | |
25 | #include "EvtGenBase/EvtParticle.hh" | |
26 | #include "EvtGenBase/EvtGenKine.hh" | |
27 | #include "EvtGenBase/EvtPDL.hh" | |
28 | #include "EvtGenBase/EvtTensor4C.hh" | |
29 | #include "EvtGenBase/EvtReport.hh" | |
30 | #include "EvtGenModels/EvtTSS.hh" | |
31 | #include <string> | |
32 | ||
33 | EvtTSS::~EvtTSS() {} | |
34 | ||
35 | std::string EvtTSS::getName(){ | |
36 | ||
37 | return "TSS"; | |
38 | ||
39 | } | |
40 | ||
41 | ||
42 | EvtDecayBase* EvtTSS::clone(){ | |
43 | ||
44 | return new EvtTSS; | |
45 | ||
46 | } | |
47 | ||
48 | void EvtTSS::init(){ | |
49 | ||
50 | // check that there are 0 arguments | |
51 | checkNArg(0); | |
52 | ||
53 | checkNDaug(2); | |
54 | ||
55 | checkSpinParent(EvtSpinType::TENSOR); | |
56 | ||
57 | checkSpinDaughter(0,EvtSpinType::SCALAR); | |
58 | checkSpinDaughter(1,EvtSpinType::SCALAR); | |
59 | ||
60 | ||
61 | } | |
62 | ||
63 | void EvtTSS::initProbMax() { | |
64 | ||
65 | setProbMax(1.0); | |
66 | ||
67 | } | |
68 | ||
69 | void EvtTSS::decay( EvtParticle *p){ | |
70 | ||
71 | p->initializePhaseSpace(getNDaug(),getDaugs()); | |
72 | ||
73 | EvtVector4R moms1 = p->getDaug(0)->getP4(); | |
74 | ||
75 | double norm = 1.0/(moms1.d3mag()*moms1.d3mag()); | |
76 | ||
77 | vertex(0,norm*(p->epsTensor(0).cont1(EvtVector4C(moms1))*(moms1))); | |
78 | vertex(1,norm*(p->epsTensor(1).cont1(EvtVector4C(moms1))*(moms1))); | |
79 | vertex(2,norm*(p->epsTensor(2).cont1(EvtVector4C(moms1))*(moms1))); | |
80 | vertex(3,norm*(p->epsTensor(3).cont1(EvtVector4C(moms1))*(moms1))); | |
81 | vertex(4,norm*(p->epsTensor(4).cont1(EvtVector4C(moms1))*(moms1))); | |
82 | ||
83 | return ; | |
84 | } |