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Public Member Functions | List of all members
EvtVPHOtoVISR Class Reference

#include <EvtVPHOtoVISR.hh>

+ Inheritance diagram for EvtVPHOtoVISR:

Public Member Functions

 EvtVPHOtoVISR ()
 
virtual ~EvtVPHOtoVISR ()
 
void getName (std::string &name)
 
EvtDecayBase * clone ()
 
void decay (EvtParticle *p)
 
void init ()
 
void initProbMax ()
 
 EvtVPHOtoVISR ()
 
virtual ~EvtVPHOtoVISR ()
 
void getName (std::string &name)
 
EvtDecayBase * clone ()
 
void decay (EvtParticle *p)
 
void init ()
 
void initProbMax ()
 
- 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 ()
 
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 void getName (std::string &name)=0
 
virtual void decay (EvtParticle *p)=0
 
virtual void makeDecay (EvtParticle *p)=0
 
virtual EvtDecayBase * clone ()=0
 
virtual void init ()
 
virtual void initProbMax ()
 
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 ()
 
virtual void getName (std::string &name)=0
 
virtual void decay (EvtParticle *p)=0
 
virtual void makeDecay (EvtParticle *p)=0
 
virtual EvtDecayBase * clone ()=0
 
virtual void init ()
 
virtual void initProbMax ()
 
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)
 
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 ()
 
bool daugsDecayedByParentModel ()
 
- Protected Attributes inherited from EvtDecayAmp
EvtAmp _amp2
 
- Protected Attributes inherited from EvtDecayBase
bool _daugsDecayedByParentModel
 

Detailed Description

Definition at line 28 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.hh.

Constructor & Destructor Documentation

◆ EvtVPHOtoVISR() [1/2]

EvtVPHOtoVISR::EvtVPHOtoVISR ( )
inline

Definition at line 32 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.hh.

32{}

Referenced by clone().

◆ ~EvtVPHOtoVISR() [1/2]

EvtVPHOtoVISR::~EvtVPHOtoVISR ( )
virtual

Definition at line 32 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.cc.

32{}

◆ EvtVPHOtoVISR() [2/2]

EvtVPHOtoVISR::EvtVPHOtoVISR ( )
inline

Definition at line 32 of file BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.hh.

32{}

◆ ~EvtVPHOtoVISR() [2/2]

virtual EvtVPHOtoVISR::~EvtVPHOtoVISR ( )
virtual

Member Function Documentation

◆ clone() [1/2]

EvtDecayBase * EvtVPHOtoVISR::clone ( )
virtual

Implements EvtDecayBase.

Definition at line 41 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.cc.

41 {
42
43 return new EvtVPHOtoVISR;
44
45}

◆ clone() [2/2]

EvtDecayBase * EvtVPHOtoVISR::clone ( )
virtual

Implements EvtDecayBase.

◆ decay() [1/2]

void EvtVPHOtoVISR::decay ( EvtParticle *  p)
virtual

Implements EvtDecayBase.

Definition at line 67 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.cc.

67 {
68
69 //take photon along z-axis, either forward or backward.
70 //Implement this as generating the photon momentum along
71 //the z-axis uniformly
72
73 double w=p->mass();
74 double s=w*w;
75
76 double L=2.0*log(w/0.000511);
77 double alpha=1/137.0;
78 double beta=(L-1)*2.0*alpha/EvtConst::pi;
79
80 //This uses the fact that there is a daughter of the
81 //psi(3770)
82 assert(p->getDaug(0)->getDaug(0)!=0);
83 double md=EvtPDL::getMeanMass(p->getDaug(0)->getDaug(0)->getId());
84
85 static double mD0=EvtPDL::getMeanMass(EvtPDL::getId("D0"));
86 static double mDp=EvtPDL::getMeanMass(EvtPDL::getId("D+"));
87
88 double pgmax=(s-4.0*md*md)/(2.0*w);
89
90 assert(pgmax>0.0);
91
92 double pgz=0.99*pgmax*exp(log(EvtRandom::Flat(1.0))/beta);
93
94 if (EvtRandom::Flat(1.0)<0.5) pgz=-pgz;
95
96 double k=fabs(pgz);
97
98 EvtVector4R p4g(k,0.0,0.0,pgz);
99
100 EvtVector4R p4res=p->getP4Restframe()-p4g;
101
102 double mres=p4res.mass();
103
104 double ed=mres/2.0;
105
106 assert(ed>md);
107
108 double pd=sqrt(ed*ed-md*md);
109
110
111 //std::cout << "k, mres, w, md, ed, pd:"<<k<<" "<<mres<<" "<<w<<" "<<md<<" "<<ed<<" "<<pd<<std::endl;
112
113 p->getDaug(0)->init(getDaug(0),p4res);
114 p->getDaug(1)->init(getDaug(1),p4g);
115
116
117 double sigma=beta*pow(2/w,beta)*(1+alpha*(1.5*L-2.0+EvtConst::pi*EvtConst::pi/3.0)/EvtConst::pi);
118
119 double m=EvtPDL::getMeanMass(p->getDaug(0)->getId());
120 double Gamma=EvtPDL::getWidth(p->getDaug(0)->getId());
121
122 //mres is the energy of the psi(3770)
123
124 double p0=0.0;
125 if (ed>mD0) p0=sqrt(ed*ed-mD0*mD0);
126 double pp=0.0;
127 if (ed>mDp) pp=sqrt(ed*ed-mDp*mDp);
128
129 double p0norm=sqrt(0.25*m*m-mD0*mD0);
130 double ppnorm=sqrt(0.25*m*m-mDp*mDp);
131
132 double r0=12.7;
133 double rp=12.7;
134
135 if (getNArg()==2){
136 r0=getArg(0);
137 rp=getArg(1);
138 }
139
140 double GammaTot=Gamma*(pp*pp*pp/(1+pp*pp*rp*rp)+p0*p0*p0/(1+p0*p0*r0*r0))/
141 (ppnorm*ppnorm*ppnorm/(1+ppnorm*ppnorm*rp*rp)+
142 p0norm*p0norm*p0norm/(1+p0norm*p0norm*r0*r0));
143
144
145 sigma*=pd*pd*pd/((mres-m)*(mres-m)+0.25*GammaTot*GammaTot);
146
147 assert(sigma>0.0);
148
149 static double sigmax=sigma;
150
151 if (sigma>sigmax){
152 sigmax=sigma;
153 }
154
155
156
157 static int count=0;
158
159 count++;
160
161 //if (count%10000==0){
162 // std::cout << "sigma :"<<sigma<<std::endl;
163 // std::cout << "sigmax:"<<sigmax<<std::endl;
164 //}
165
166 double norm=sqrt(sigma);
167
168 vertex(0,0,0,norm*p->eps(0)*p->epsParent(0).conj());
169 vertex(1,0,0,norm*p->eps(1)*p->epsParent(0).conj());
170 vertex(2,0,0,norm*p->eps(2)*p->epsParent(0).conj());
171
172 vertex(0,1,0,norm*p->eps(0)*p->epsParent(1).conj());
173 vertex(1,1,0,norm*p->eps(1)*p->epsParent(1).conj());
174 vertex(2,1,0,norm*p->eps(2)*p->epsParent(1).conj());
175
176 vertex(0,2,0,norm*p->eps(0)*p->epsParent(2).conj());
177 vertex(1,2,0,norm*p->eps(1)*p->epsParent(2).conj());
178 vertex(2,2,0,norm*p->eps(2)*p->epsParent(2).conj());
179
180 vertex(0,0,1,norm*p->eps(0)*p->epsParent(0).conj());
181 vertex(1,0,1,norm*p->eps(1)*p->epsParent(0).conj());
182 vertex(2,0,1,norm*p->eps(2)*p->epsParent(0).conj());
183
184 vertex(0,1,1,norm*p->eps(0)*p->epsParent(1).conj());
185 vertex(1,1,1,norm*p->eps(1)*p->epsParent(1).conj());
186 vertex(2,1,1,norm*p->eps(2)*p->epsParent(1).conj());
187
188 vertex(0,2,1,norm*p->eps(0)*p->epsParent(2).conj());
189 vertex(1,2,1,norm*p->eps(1)*p->epsParent(2).conj());
190 vertex(2,2,1,norm*p->eps(2)*p->epsParent(2).conj());
191
192 return;
193}
sigma
TTree * sigma
Definition: CurConst_dEdXCal.cxx:6
alpha
const double alpha
Definition: FastVertexFit.cxx:4
s
XmlRpcServer s
Definition: HelloServer.cpp:11
mD0
const double mD0
Definition: MyConst.h:5
exp
EvtComplex exp(const EvtComplex &c)
Definition: bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenBase/EvtComplex.hh:252
EvtPDL::getId
static EvtId getId(const std::string &name)
Definition: bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenBase/EvtPDL.cc:287
EvtParticle::init
virtual void init(EvtId part_n, const EvtVector4R &p4)=0
rb::Gamma
double Gamma(const double Q2, const double M2, const double G, const double mkpp2, const double mkmp2)
Definition: TUtil.h:16

◆ decay() [2/2]

void EvtVPHOtoVISR::decay ( EvtParticle *  p)
virtual

Implements EvtDecayBase.

◆ getName() [1/2]

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

Implements EvtDecayBase.

Definition at line 34 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.cc.

34 {
35
36 model_name="VPHOTOVISR";
37
38}

◆ getName() [2/2]

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

Implements EvtDecayBase.

◆ init() [1/2]

void EvtVPHOtoVISR::init ( )
virtual

Reimplemented from EvtDecayBase.

Definition at line 47 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.cc.

47 {
48
49 // check that there are 0 or 2 arguments
50 checkNArg(0,2);
51
52 // check that there are 2 daughters
53 checkNDaug(2);
54
55 // check the parent and daughter spins
56 checkSpinParent(EvtSpinType::VECTOR);
57 checkSpinDaughter(0,EvtSpinType::VECTOR);
58 checkSpinDaughter(1,EvtSpinType::PHOTON);
59}
EvtDecayBase::checkSpinDaughter
void checkSpinDaughter(int d1, EvtSpinType::spintype sp)
Definition: bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenBase/EvtDecayBase.cc:533
EvtDecayBase::checkNArg
void checkNArg(int a1, int a2=-1, int a3=-1, int a4=-1)
Definition: bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenBase/EvtDecayBase.cc:482

◆ init() [2/2]

void EvtVPHOtoVISR::init ( )
virtual

Reimplemented from EvtDecayBase.

◆ initProbMax() [1/2]

void EvtVPHOtoVISR::initProbMax ( )
virtual

Reimplemented from EvtDecayBase.

Definition at line 61 of file bak-BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtVPHOtoVISR.cc.

61 {
62
63 //setProbMax(100000.0);
64
65}

◆ initProbMax() [2/2]

void EvtVPHOtoVISR::initProbMax ( )
virtual

Reimplemented from EvtDecayBase.

The documentation for this class was generated from the following files: