BOSS 8.0.0
BESIII Offline Software System
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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)

Detailed Description

Definition at line 28 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 29 of file EvtbTosllAliFF.cc.

30 {
31
32 double m = EvtPDL::getMeanMass( parent );
33 // double md=EvtPDL::getMeanMass(daught);
34
35 double shat = t / ( m * m );
36 double shat2 = shat * shat;
37 double shat3 = shat2 * shat;
38
39 fp = 0.278 * exp( 1.568 * shat + 0.470 * shat2 + 0.885 * shat3 );
40 f0 = 0.278 * exp( 0.740 * shat + 0.080 * shat2 + 0.425 * shat3 );
41 ft = 0.300 * exp( 1.600 * shat + 0.501 * shat2 + 0.796 * shat3 );
42}
exp
EvtComplex exp(const EvtComplex &c)
Definition EvtComplex.hh:209
EvtPDL::getMeanMass
static double getMeanMass(EvtId i)
Definition EvtPDL.hh:43
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 44 of file EvtbTosllAliFF.cc.

46 {
47
48 double m = EvtPDL::getMeanMass( parent );
49 // double md=EvtPDL::getMeanMass(daught);
50
51 double shat = t / ( m * m );
52 double shat2 = shat * shat;
53
54 // this is Ali 'minimum allowed form factors'
55 a1 = 0.294 * exp( 0.656 * shat + 0.456 * shat2 );
56 a2 = 0.246 * exp( 1.237 * shat + 0.822 * shat2 );
57 a0 = 0.412 * exp( 1.543 * shat + 0.954 * shat2 );
58 v = 0.399 * exp( 1.537 * shat + 1.123 * shat2 );
59
60 t1 = 0.334 * exp( 1.575 * shat + 1.140 * shat2 );
61 t2 = 0.334 * exp( 0.562 * shat + 0.481 * shat2 );
62 t3 = 0.234 * exp( 1.230 * shat + 1.089 * shat2 );
63}
a0
character *LEPTONflag integer iresonances real zeta5 real a0
Definition Ekhara/src/ekhara/common.h: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
The documentation for this class was generated from the following files: