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Public Member Functions | Public Attributes | List of all members
Pythia8::Sigma2qqbar2nueStarnueBar Class Reference
Inheritance diagram for Pythia8::Sigma2qqbar2nueStarnueBar:
Collaboration diagram for Pythia8::Sigma2qqbar2nueStarnueBar:

Public Member Functions

 Sigma2qqbar2nueStarnueBar ()
void initProc ()
virtual double sigmaHat ()
void sigmaKin ()
void setIdColAcol ()
double weightDecay (Event &process, int iResBeg, int iResEnd)
virtual std::string name () const
virtual int code () const
virtual std::string inFlux () const
virtual int id3Mass () const

Public Attributes

int idl
int idRes
int codeSave
std::string nameSave
double Lambda
double preFac
double openFracPos
double openFracNeg
double sigma
double m2ResTimes4

Detailed Description

Definition at line 162 of file Sigma2qqbar2lStarlBar.cxx.

Constructor & Destructor Documentation

◆ Sigma2qqbar2nueStarnueBar()

Pythia8::Sigma2qqbar2nueStarnueBar::Sigma2qqbar2nueStarnueBar ( )
inline

Definition at line 164 of file Sigma2qqbar2lStarlBar.cxx.

164: Sigma2qqbar2lStarlBar(12) {}

Member Function Documentation

◆ code()

virtual int Pythia8::Sigma2qqbar2lStarlBar::code ( ) const
inlinevirtualinherited

Definition at line 148 of file Sigma2qqbar2lStarlBar.cxx.

148{return codeSave;}

◆ id3Mass()

virtual int Pythia8::Sigma2qqbar2lStarlBar::id3Mass ( ) const
inlinevirtualinherited

Definition at line 150 of file Sigma2qqbar2lStarlBar.cxx.

150{return std::abs(idRes);}

◆ inFlux()

virtual std::string Pythia8::Sigma2qqbar2lStarlBar::inFlux ( ) const
inlinevirtualinherited

Definition at line 149 of file Sigma2qqbar2lStarlBar.cxx.

149{return "qqbarSame";}

◆ initProc()

void Pythia8::Sigma2qqbar2lStarlBar::initProc ( )
inlineinherited

Definition at line 52 of file Sigma2qqbar2lStarlBar.cxx.

52 {
53
54 // Set up process properties from the chosen lepton flavour.
55 idRes = 4000000 + idl;
56 codeSave = 4060 + idl;
57 if (idl == 11) nameSave = "q qbar -> e^*+- e^-+";
58 else if (idl == 12) nameSave = "q qbar -> nu_e^* nu_ebar";
59 else if (idl == 13) nameSave = "q qbar -> mu^*+- mu^-+";
60 else if (idl == 14) nameSave = "q qbar -> nu_mu^* nu_mubar";
61 else if (idl == 15) nameSave = "q qbar -> tau^*+- tau^-+";
62 else nameSave = "q qbar -> nu_tau^* nu_taubar";
63
64 // Secondary open width fractions.
65 openFracPos = particleDataPtr->resOpenFrac( idRes);
66 openFracNeg = particleDataPtr->resOpenFrac(-idRes);
67
68 // Locally stored properties and couplings.
69 Lambda = settingsPtr->parm("ExcitedFermion:Lambda");
70 preFac = (M_PI / pow4(Lambda)) * (openFracPos + openFracNeg) / 3.; // orig pythia
71 //preFac = (M_PI / pow4(Lambda)) * (openFracPos + openFracNeg) / 6.;
72
73 }
M_PI
#define M_PI
Definition ActiveFraction.h:11

◆ name()

virtual std::string Pythia8::Sigma2qqbar2lStarlBar::name ( ) const
inlinevirtualinherited

Definition at line 147 of file Sigma2qqbar2lStarlBar.cxx.

147{return nameSave;}

◆ setIdColAcol()

void Pythia8::Sigma2qqbar2lStarlBar::setIdColAcol ( )
inlineinherited

Definition at line 95 of file Sigma2qqbar2lStarlBar.cxx.

95 {
96
97 // Flavours: either lepton or antilepton may be excited.
98 if (rndmPtr->flat() * (openFracPos + openFracNeg) < openFracPos) {
99 setId( id1, id2, idRes, -idl);
100 if (id1 < 0) swapTU = true;
101 } else {
102 setId( id1, id2, -idRes, idl);
103 if (id1 > 0) swapTU = true;
104 }
105
106 // Colour flow trivial.
107 if (id1 > 0) setColAcol( 1, 0, 0, 1, 0, 0, 0, 0);
108 else setColAcol( 0, 1, 1, 0, 0, 0, 0, 0);
109
110 }

◆ sigmaHat()

virtual double Pythia8::Sigma2qqbar2lStarlBar::sigmaHat ( )
inlinevirtualinherited

Definition at line 77 of file Sigma2qqbar2lStarlBar.cxx.

77{return sigma;}

◆ sigmaKin()

void Pythia8::Sigma2qqbar2lStarlBar::sigmaKin ( )
inlineinherited

Definition at line 82 of file Sigma2qqbar2lStarlBar.cxx.

82 {
83
84 // later this gets multiplied further with sH*(1-s3/sH)
85
86 sigma = preFac * (-uH) * (sH + tH) / sH2; // orig pythia
87 //sigma = preFac * (2. + s3/sH) *(1 - s3/sH) ;
88 //Baur sigma = preFac * ( 1 + 1./3.*(sH - s3)/(sH+s3) ) * (1 - s3/sH) * (1 + s3/sH);
89 }

◆ weightDecay()

double Pythia8::Sigma2qqbar2lStarlBar::weightDecay ( Event & process,
int iResBeg,
int iResEnd )
inlineinherited

Definition at line 114 of file Sigma2qqbar2lStarlBar.cxx.

115 {
116
117 // l* should sit in entry 5. and 6 Sequential Z/W decay assumed isotropic.
118 if (iResBeg != 5 && iResEnd != 5 && iResBeg != 6 && iResEnd != 6 ) return 1.;
119
120 // Phase space factors.
121 double mr1 = pow2(process[7].m() / process[5].m());
122 double mr2 = pow2(process[8].m() / process[5].m());
123
124 // Reconstruct decay angle in l* CoM frame.
125 int idAbs3 = process[7].idAbs();
126 Vec4 pLStarCom = (idAbs3 < 20) ? process[8].p() : process[7].p();
127 //Vec4 pLStarCom = (idAbs3 < 20) ? process[7].p() : process[8].p(); // orig pythia
128 pLStarCom.bstback(process[5].p());
129 double cosThe = costheta(pLStarCom, process[5].p());
130 double wt = 1.;
131
132 // Decay, l* -> l + gamma/Z^0/W^+-).
133 int idBoson = (idAbs3 < 20) ? process[8].idAbs() : process[7].idAbs();
134 if (idBoson == 22) {
135 wt = 0.5 * (1. + cosThe);
136 } else if (idBoson == 23 || idBoson == 24) {
137 double mrB = (idAbs3 < 20) ? mr2 : mr1;
138 double kTrm = 0.5 * (mrB * (1. - cosThe));
139 wt = (1. + cosThe + kTrm) / (2 + mrB);
140 }
141
142 // Done.
143 return wt;
144 }
pow2
static const std::map< unsigned int, unsigned int > pow2
Definition TriggerProcessor.cxx:23
process
const std::string process
Definition fbtTestBasics.cxx:76

Member Data Documentation

◆ codeSave

int Pythia8::Sigma2qqbar2lStarlBar::codeSave
inherited

Definition at line 156 of file Sigma2qqbar2lStarlBar.cxx.

◆ idl

int Pythia8::Sigma2qqbar2lStarlBar::idl
inherited

Definition at line 156 of file Sigma2qqbar2lStarlBar.cxx.

◆ idRes

int Pythia8::Sigma2qqbar2lStarlBar::idRes
inherited

Definition at line 156 of file Sigma2qqbar2lStarlBar.cxx.

◆ Lambda

double Pythia8::Sigma2qqbar2lStarlBar::Lambda
inherited

Definition at line 158 of file Sigma2qqbar2lStarlBar.cxx.

◆ m2ResTimes4

double Pythia8::Sigma2qqbar2lStarlBar::m2ResTimes4
inherited

Definition at line 159 of file Sigma2qqbar2lStarlBar.cxx.

◆ nameSave

std::string Pythia8::Sigma2qqbar2lStarlBar::nameSave
inherited

Definition at line 157 of file Sigma2qqbar2lStarlBar.cxx.

◆ openFracNeg

double Pythia8::Sigma2qqbar2lStarlBar::openFracNeg
inherited

Definition at line 158 of file Sigma2qqbar2lStarlBar.cxx.

◆ openFracPos

double Pythia8::Sigma2qqbar2lStarlBar::openFracPos
inherited

Definition at line 158 of file Sigma2qqbar2lStarlBar.cxx.

◆ preFac

double Pythia8::Sigma2qqbar2lStarlBar::preFac
inherited

Definition at line 158 of file Sigma2qqbar2lStarlBar.cxx.

◆ sigma

double Pythia8::Sigma2qqbar2lStarlBar::sigma
inherited

Definition at line 158 of file Sigma2qqbar2lStarlBar.cxx.

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