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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/EvtVectorIsr2.hh | |
12 | // | |
13 | // Description: | |
14 | // This is a special decay model to generate e+e- -> phi gamma + soft gammas | |
15 | // using soft collinear ISR calculation from AfkQed | |
16 | // This is implemented as a decay of the VPHO. | |
17 | // | |
18 | // Modification history: | |
19 | // | |
20 | // Joe Izen Oct, 2005 Soft Colinear Photons (secondary ISR) ported from AfkQed | |
21 | // Joe Izen Dec 16, 2002 Fix cos_theta distribution - prevents boom at cos_theta=+/-1 | |
22 | // RYD/Adriano June 16, 1998 Module created | |
23 | // | |
24 | //------------------------------------------------------------------------ | |
25 | ||
26 | #ifndef EVTVECTORISR_HH | |
27 | #define EVTVECTORISR_HH | |
28 | ||
29 | #include "EvtGenBase/EvtDecayIncoherent.hh" | |
30 | ||
31 | class EvtParticle; | |
32 | ||
33 | ||
34 | class EvtVectorIsr:public EvtDecayIncoherent { | |
35 | ||
36 | public: | |
37 | ||
38 | EvtVectorIsr() {} | |
39 | virtual ~EvtVectorIsr(); | |
40 | ||
41 | ||
42 | std::string getName(); | |
43 | ||
44 | EvtDecayBase* clone(); | |
45 | ||
46 | void decay(EvtParticle *p); | |
47 | ||
48 | void init(); | |
49 | ||
50 | void initProbMax(); | |
51 | ||
52 | double ckhrad1(double xx, double a, double b); | |
53 | ||
54 | void ckhrad(const double& e_beam,const double& q2_min,double& e01,double& e02,double& f); | |
55 | ||
56 | ||
57 | private: | |
58 | ||
59 | double csfrmn,csbkmn; | |
60 | double fmax; | |
61 | bool firstorder; | |
62 | }; | |
63 | ||
64 | #endif | |
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