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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: EvtGen/EvtDecayIncoherent.cc | |
12 | // | |
13 | // Description: | |
14 | // | |
15 | // Modification history: | |
16 | // | |
17 | // DJL/RYD August 11, 1998 Module created | |
18 | // | |
19 | //------------------------------------------------------------------------ | |
20 | #include "EvtGenBase/EvtPatches.hh" | |
21 | ||
22 | #include "EvtGenBase/EvtDecayBase.hh" | |
23 | #include "EvtGenBase/EvtDecayIncoherent.hh" | |
24 | #include "EvtGenBase/EvtParticle.hh" | |
25 | #include "EvtGenBase/EvtRadCorr.hh" | |
26 | #include "EvtGenBase/EvtReport.hh" | |
27 | #include "EvtGenBase/EvtPDL.hh" | |
28 | ||
29 | ||
30 | void EvtDecayIncoherent::makeDecay(EvtParticle* p, bool recursive){ | |
31 | ||
32 | //initialize this the hard way.. | |
33 | //Lange June 26, 2000 | |
34 | for (size_t i=0; i<static_cast<unsigned int>(MAX_DAUG); i++ ) { | |
35 | spinDensitySet[i]=0; | |
36 | } | |
37 | ||
38 | _daugsDecayedByParentModel=false; | |
39 | ||
40 | decay(p); | |
41 | p->setDecayProb(1.0); | |
42 | ||
43 | EvtSpinDensity rho; | |
44 | ||
45 | rho.setDiag(p->getSpinStates()); | |
46 | ||
47 | p->setSpinDensityBackward(rho); | |
48 | ||
49 | if (getPHOTOS() || EvtRadCorr::alwaysRadCorr()) { | |
50 | EvtRadCorr::doRadCorr(p); | |
51 | } | |
52 | ||
53 | if(!recursive) return; | |
54 | ||
55 | //Now decay the daughters. | |
56 | ||
57 | if ( !daugsDecayedByParentModel()) { | |
58 | ||
59 | for(size_t i=0;i<p->getNDaug();i++){ | |
60 | //Need to set the spin density of the daughters to be | |
61 | //diagonal. | |
62 | rho.setDiag(p->getDaug(i)->getSpinStates()); | |
63 | //if (p->getDaug(i)->getNDaug()==0){ | |
64 | //only do this if the user has not already set the | |
65 | //spin density matrix herself. | |
66 | //Lange June 26, 2000 | |
67 | if ( isDaughterSpinDensitySet(i)==0 ) { | |
68 | p->getDaug(i)->setSpinDensityForward(rho); | |
69 | } | |
70 | else{ | |
71 | //report(INFO,"EvtGen") << "spinDensitymatrix already set!!!\n"; | |
72 | EvtSpinDensity temp=p->getDaug(i)->getSpinDensityForward(); | |
73 | // report(INFO,"EvtGen") <<temp<<endl; | |
74 | } | |
75 | //Now decay the daughter. Really! | |
76 | p->getDaug(i)->decay(); | |
77 | } | |
78 | } | |
79 | ||
80 | } | |
81 | ||
82 | ||
83 | ||
84 | ||
85 | ||
86 | ||
87 |