]>
Commit | Line | Data |
---|---|---|
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/EvtFlatte.hh | |
12 | // | |
13 | // Description:resonance-defining class | |
14 | // | |
15 | // Modification history: | |
16 | // | |
17 | // ponyisi 18 Feb 2008 created | |
18 | // | |
19 | //------------------------------------------------------------------------ | |
20 | ||
21 | #ifndef EVTFLATTE_HH | |
22 | #define EVTFLATTE_HH | |
23 | ||
24 | #include "EvtGenBase/EvtVector4R.hh" | |
25 | #include <vector> | |
26 | ||
27 | using std::vector; | |
28 | ||
29 | class EvtComplex; | |
30 | ||
31 | // Helper class | |
32 | ||
33 | class EvtFlatteParam { | |
34 | public: | |
35 | EvtFlatteParam(double m1, double m2, double g): | |
36 | _m1(m1), _m2(m2), _g(g) {} | |
37 | ||
38 | inline double m1() const { return _m1; } | |
39 | inline double m2() const { return _m2; } | |
40 | inline double g() const { return _g; } | |
41 | ||
42 | private: | |
43 | double _m1, _m2, _g; | |
44 | }; | |
45 | ||
46 | //class declaration | |
47 | ||
48 | class EvtFlatte { | |
49 | public: | |
50 | ||
51 | //operator | |
52 | EvtFlatte& operator = (const EvtFlatte &); | |
53 | ||
54 | //constructor with all information about the resonance | |
55 | EvtFlatte(const EvtVector4R& p4_p, const EvtVector4R& p4_d1, | |
56 | const EvtVector4R& p4_d2, | |
57 | double ampl, double theta, | |
58 | double mass, | |
59 | vector<EvtFlatteParam>& params | |
60 | // double m1a = 0.0, double m1b = 0.0, double g1 = 0.0, | |
61 | // double m2a = 0.0, double m2b = 0.0, double g2 = 0.0 | |
62 | ); | |
63 | ||
64 | //destructor | |
65 | virtual ~EvtFlatte(); | |
66 | ||
67 | //accessors | |
68 | //return 4-momenta of the particles involved | |
69 | inline const EvtVector4R& p4_p() { return _p4_p; } | |
70 | inline const EvtVector4R& p4_d1() { return _p4_d1; } | |
71 | inline const EvtVector4R& p4_d2() { return _p4_d2; } | |
72 | ||
73 | ||
74 | //return amplitude | |
75 | inline double amplitude() { return _ampl; } | |
76 | ||
77 | //return theta | |
78 | inline double theta() { return _theta; } | |
79 | ||
80 | //return bwm | |
81 | inline double mass() { return _mass; } | |
82 | ||
83 | //functions | |
84 | ||
85 | //calculate amplitude for this resonance | |
86 | EvtComplex resAmpl(); | |
87 | ||
88 | private: | |
89 | ||
90 | inline EvtComplex sqrtCplx(double in) { return (in > 0) ? EvtComplex(sqrt(in), 0) : EvtComplex | |
91 | (0, sqrt(-in)); } | |
92 | ||
93 | EvtVector4R _p4_p, _p4_d1, _p4_d2; | |
94 | double _ampl, _theta, _mass; | |
95 | vector<EvtFlatteParam> _params; | |
96 | // double _m1a, _m1b, _g1; | |
97 | // double _m2a, _m2b, _g2; | |
98 | }; | |
99 | ||
100 | #endif | |
101 |