CGEM BOSS 6.6.5.h
BESIII Offline Software System
Loading...
Searching...
No Matches
Public Member Functions | List of all members
EvtbTosllAliFF Class Reference

#include <EvtbTosllAliFF.hh>

+ Inheritance diagram for EvtbTosllAliFF:

Public Member Functions

 EvtbTosllAliFF ()
 
void getScalarFF (EvtId parent, EvtId daught, double t, double mass, double &fp, double &f0, double &ft)
 
void getVectorFF (EvtId parent, EvtId daught, double t, double mass, double &a1, double &a2, double &a0, double &v, double &t1, double &t2, double &t3)
 
- Public Member Functions inherited from EvtbTosllFF

Detailed Description

Definition at line 29 of file EvtbTosllAliFF.hh.

Constructor & Destructor Documentation

◆ EvtbTosllAliFF()

EvtbTosllAliFF::EvtbTosllAliFF ( )

Definition at line 27 of file EvtbTosllAliFF.cc.

27{}

Member Function Documentation

◆ getScalarFF()

void EvtbTosllAliFF::getScalarFF ( EvtId parent,
EvtId daught,
double t,
double mass,
double & fp,
double & f0,
double & ft )
virtual

Reimplemented from EvtbTosllFF.

Definition at line 30 of file EvtbTosllAliFF.cc.

32 {
33
34 double m=EvtPDL::getMeanMass(parent);
35 //double md=EvtPDL::getMeanMass(daught);
36
37 double shat=t/(m*m);
38 double shat2=shat*shat;
39 double shat3=shat2*shat;
40
41 fp = 0.278*exp(1.568*shat+0.470*shat2+0.885*shat3);
42 f0 = 0.278*exp(0.740*shat+0.080*shat2+0.425*shat3);
43 ft = 0.300*exp(1.600*shat+0.501*shat2+0.796*shat3);
44
45}
exp
EvtComplex exp(const EvtComplex &c)
Definition EvtComplex.hh:252
EvtPDL::getMeanMass
static double getMeanMass(EvtId i)
Definition EvtPDL.hh:45
t
int t()
Definition t.c:1

◆ getVectorFF()

void EvtbTosllAliFF::getVectorFF ( EvtId parent,
EvtId daught,
double t,
double mass,
double & a1,
double & a2,
double & a0,
double & v,
double & t1,
double & t2,
double & t3 )
virtual

Reimplemented from EvtbTosllFF.

Definition at line 48 of file EvtbTosllAliFF.cc.

51 {
52
53
54 double m=EvtPDL::getMeanMass(parent);
55 //double md=EvtPDL::getMeanMass(daught);
56
57 double shat=t/(m*m);
58 double shat2=shat*shat;
59
60 //this is Ali 'minimum allowed form factors'
61 a1=0.294*exp(0.656*shat+0.456*shat2);
62 a2=0.246*exp(1.237*shat+0.822*shat2);
63 a0=0.412*exp(1.543*shat+0.954*shat2);
64 v=0.399*exp(1.537*shat+1.123*shat2);
65
66 t1=0.334*exp(1.575*shat+1.140*shat2);
67 t2=0.334*exp(0.562*shat+0.481*shat2);
68 t3=0.234*exp(1.230*shat+1.089*shat2);
69
70}
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
The documentation for this class was generated from the following files: