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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/EvtId.hh | |
12 | // | |
13 | // Description:Class for particle Id used in EvtGen. | |
14 | // | |
15 | // Modification history: | |
16 | // | |
17 | // DJL/RYD May 26, 1998 Module created | |
18 | // | |
19 | //------------------------------------------------------------------------ | |
20 | ||
21 | #ifndef EVTID_HH | |
22 | #define EVTID_HH | |
23 | ||
24 | #include <iostream> | |
25 | //class ostream; | |
26 | ||
27 | class EvtId { | |
28 | ||
29 | public: | |
30 | ||
31 | //need a default constructor | |
32 | EvtId():_id(-1),_alias(-1){} | |
33 | ||
34 | EvtId(int id,int alias):_id(id),_alias(alias){} | |
35 | ||
36 | friend std::ostream& operator<<(std::ostream& s, const EvtId& v); | |
37 | ||
38 | int operator==(const EvtId& id) const { return _id==id._id; } | |
39 | int operator!=(const EvtId& id) const { return _id!=id._id; } | |
40 | int isConjugate(const EvtId & id) const; | |
41 | ||
42 | int getId() const { return _id;} | |
43 | ||
44 | int getAlias() const { return _alias;} | |
45 | ||
46 | int isAlias() const { return _id!=_alias;} | |
47 | ||
48 | private: | |
49 | ||
50 | //particle number 0..n. The order of particles are determined | |
51 | //by the order in pdt.table | |
52 | int _id; | |
53 | //if the particle is an alias to another particle alias!=id | |
54 | //The only place where the alias should be used is for looking | |
55 | //up decays in the decay table. | |
56 | int _alias; | |
57 | ||
58 | }; | |
59 | ||
60 | #endif | |
61 |