BOSS 7.1.1
BESIII Offline Software System
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Public Member Functions | List of all members
EvtT2GV Class Reference

#include <EvtT2GV.hh>

+ Inheritance diagram for EvtT2GV:

Public Member Functions

 EvtT2GV ()
 
virtual ~EvtT2GV ()
 
void getName (std::string &name)
 
EvtDecayBase * clone ()
 
void initProbMax ()
 
void init ()
 
void decay (EvtParticle *p)
 
- Public Member Functions inherited from EvtDecayAmp
void makeDecay (EvtParticle *p)
 
void setWeight (double weight)
 
void vertex (const EvtComplex &amp)
 
void vertex (int i1, const EvtComplex &amp)
 
void vertex (int i1, int i2, const EvtComplex &amp)
 
void vertex (int i1, int i2, int i3, const EvtComplex &amp)
 
void vertex (int *i1, const EvtComplex &amp)
 
virtual ~EvtDecayAmp ()
 
- Public Member Functions inherited from EvtDecayBase
virtual std::string commandName ()
 
virtual void command (std::string cmd)
 
double getProbMax (double prob)
 
double resetProbMax (double prob)
 
 EvtDecayBase ()
 
virtual ~EvtDecayBase ()
 
virtual bool matchingDecay (const EvtDecayBase &other) const
 
EvtId getParentId ()
 
double getBranchingFraction ()
 
void disableCheckQ ()
 
void checkQ ()
 
int getNDaug ()
 
EvtId * getDaugs ()
 
EvtId getDaug (int i)
 
int getNArg ()
 
int getPHOTOS ()
 
void setPHOTOS ()
 
void setVerbose ()
 
void setSummary ()
 
double * getArgs ()
 
std::string * getArgsStr ()
 
double getArg (int j)
 
std::string getArgStr (int j)
 
std::string getModelName ()
 
int getDSum ()
 
int summary ()
 
int verbose ()
 
void saveDecayInfo (EvtId ipar, int ndaug, EvtId *daug, int narg, std::vector< std::string > &args, std::string name, double brfr)
 
void printSummary ()
 
void setProbMax (double prbmx)
 
void noProbMax ()
 
void checkNArg (int a1, int a2=-1, int a3=-1, int a4=-1)
 
void checkNDaug (int d1, int d2=-1)
 
void checkSpinParent (EvtSpinType::spintype sp)
 
void checkSpinDaughter (int d1, EvtSpinType::spintype sp)
 
virtual int nRealDaughters ()
 

Additional Inherited Members

- Static Public Member Functions inherited from EvtDecayBase
static void findMasses (EvtParticle *p, int ndaugs, EvtId daugs[10], double masses[10])
 
static void findMass (EvtParticle *p)
 
static double findMaxMass (EvtParticle *p)
 
- Protected Member Functions inherited from EvtDecayBase
bool daugsDecayedByParentModel ()
 
- Protected Attributes inherited from EvtDecayAmp
EvtAmp _amp2
 
- Protected Attributes inherited from EvtDecayBase
bool _daugsDecayedByParentModel
 

Detailed Description

Definition at line 29 of file EvtT2GV.hh.

Constructor & Destructor Documentation

◆ EvtT2GV()

EvtT2GV::EvtT2GV ( )
inline

Definition at line 34 of file EvtT2GV.hh.

34{}

Referenced by clone().

◆ ~EvtT2GV()

EvtT2GV::~EvtT2GV ( )
virtual

Definition at line 37 of file EvtT2GV.cc.

37{}

Member Function Documentation

◆ clone()

EvtDecayBase * EvtT2GV::clone ( )
virtual

Implements EvtDecayBase.

Definition at line 45 of file EvtT2GV.cc.

45 {
46
47 return new EvtT2GV;
48
49}
EvtT2GV::EvtT2GV
EvtT2GV()
Definition EvtT2GV.hh:34

◆ decay()

void EvtT2GV::decay ( EvtParticle * p)
virtual

Implements EvtDecayBase.

Definition at line 65 of file EvtT2GV.cc.

65 {
66
67loop:
68 p->initializePhaseSpace(getNDaug(),getDaugs());
69 EvtParticle *v,*s1;
70 EvtVector4R pv,ps,ppr;
71
72 v =p->getDaug(0); //gamma
73 s1=p->getDaug(1); //J/psi
74 pv=v->getP4();
75 ps=s1->getP4();
76 ppr=p->getP4();
77
78 double alpha=21./73.;
79// Put phase space results into the daughters.
80// EvtHelSys angles(ppr,pv); //using helicity sys. angles
81 EvtHelSys angles(ps,pv);
82 double theta =angles.getHelAng(1);
83 double phi =angles.getHelAng(2);
84 double gamma=0;
85 double F0=1.;
86 double F1=sqrt(3.)*F0; //pure M1 transition assumed,see PRD13,p1203
87 double F2=sqrt(6.)*F0; //helicity amplitude is labeled with lambda_chi and photon
88
89
90 int j1,j2,j3;
91 for(j1=0;j1<=4;){
92 for(j2=0;j2<=1;){
93 for(j3=0;j3<=2;){
94 vertex(j1,j2,j3,0.0);j3++;}
95j2++;}
96j1++;}
97
98
99 vertex(0,0,0, Djmn(1, 1, 1,phi,theta,gamma)*F0);
100 vertex(0,0,1, Djmn(1,-1, 1,phi,theta,gamma)*F0);
101 vertex(0,0,2, Djmn(1, 0, 1,phi,theta,gamma)*F0);
102 vertex(0,1,0, Djmn(1, 1,-1,phi,theta,gamma)*F0);
103 vertex(0,1,1, Djmn(1,-1,-1,phi,theta,gamma)*F0);
104 vertex(0,1,2, Djmn(1, 0,-1,phi,theta,gamma)*F0);
105
106 vertex(1,0,0, Djmn(1, 1,-1,phi,theta,gamma)*F2);
107 vertex(1,0,1, Djmn(1,-1,-1,phi,theta,gamma)*F2);
108 vertex(1,0,2, Djmn(1, 0,-1,phi,theta,gamma)*F2);
109
110 vertex(2,1,0, Djmn(1, 1, 1,phi,theta,gamma)*F2);
111 vertex(2,1,1, Djmn(1,-1, 1,phi,theta,gamma)*F2);
112 vertex(2,1,2, Djmn(1, 0, 1,phi,theta,gamma)*F2);
113
114 vertex(3,0,0, Djmn(1, 1, 0,phi,theta,gamma)*F1);
115 vertex(3,0,1, Djmn(1,-1, 0,phi,theta,gamma)*F1);
116 vertex(3,0,2, Djmn(1, 0, 0,phi,theta,gamma)*F1);
117
118 vertex(4,1,0, Djmn(1, 1, 0,phi,theta,gamma)*F1);
119 vertex(4,1,1, Djmn(1,-1, 0,phi,theta,gamma)*F1);
120 vertex(4,1,2, Djmn(1, 0, 0,phi,theta,gamma)*F1);
121
122
123 return ;
124}
Djmn
EvtComplex Djmn(int j, int m, int n, double phi, double theta, double gamma)
Definition EvtHelSys.cc:151
alpha
const double alpha
Definition FastVertexFit.cxx:4
v
**********Class see also m_nmax DOUBLE PRECISION m_amel DOUBLE PRECISION m_x2 DOUBLE PRECISION m_alfinv DOUBLE PRECISION m_Xenph INTEGER m_KeyWtm INTEGER m_idyfs DOUBLE PRECISION m_zini DOUBLE PRECISION m_q2 DOUBLE PRECISION m_Wt_KF DOUBLE PRECISION m_WtCut INTEGER m_KFfin *COMMON c_KarLud $ !Input CMS energy[GeV] $ !CMS energy after beam spread beam strahlung[GeV] $ !Beam energy spread[GeV] $ !z boost due to beam spread $ !electron beam mass *ff pair spectrum $ !minimum v
Definition KarLud.h:35
EvtDecayAmp::vertex
void vertex(const EvtComplex &amp)
Definition EvtDecayAmp.hh:37
EvtDecayBase::getDaugs
EvtId * getDaugs()
Definition EvtDecayBase.hh:65
EvtParticle::getP4
const EvtVector4R & getP4() const
Definition EvtParticle.cc:120
EvtParticle::getDaug
EvtParticle * getDaug(int i)
Definition EvtParticle.cc:84
EvtParticle::initializePhaseSpace
double initializePhaseSpace(int numdaughter, EvtId *daughters, double poleSize=-1., int whichTwo1=0, int whichTwo2=1)
Definition EvtParticle.cc:1070

◆ getName()

void EvtT2GV::getName ( std::string & name)
virtual

Implements EvtDecayBase.

Definition at line 39 of file EvtT2GV.cc.

39 {
40
41 model_name="T2GV";
42
43}

◆ init()

void EvtT2GV::init ( )
virtual

Reimplemented from EvtDecayBase.

Definition at line 52 of file EvtT2GV.cc.

52 {
53
54 // check that there are 0 arguments
55 checkNArg(0);
56
57}
EvtDecayBase::checkNArg
void checkNArg(int a1, int a2=-1, int a3=-1, int a4=-1)
Definition EvtDecayBase.cc:482

◆ initProbMax()

void EvtT2GV::initProbMax ( )
virtual

Reimplemented from EvtDecayBase.

Definition at line 59 of file EvtT2GV.cc.

59 {
60
61 // noProbMax();
62setProbMax(30.00001);
63}
EvtDecayBase::setProbMax
void setProbMax(double prbmx)
Definition EvtDecayBase.cc:297
The documentation for this class was generated from the following files: