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Public Member Functions | Public Attributes | List of all members
Pythia8::Sigma2qqbar2numuStarnumuStarBar Class Reference
Inheritance diagram for Pythia8::Sigma2qqbar2numuStarnumuStarBar:
Collaboration diagram for Pythia8::Sigma2qqbar2numuStarnumuStarBar:

Public Member Functions

 Sigma2qqbar2numuStarnumuStarBar ()
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
virtual int id4Mass () const
virtual bool convertM2 () const
virtual bool convert2mb () 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 164 of file Sigma2qqbar2lStarlStarBar.cxx.

Constructor & Destructor Documentation

◆ Sigma2qqbar2numuStarnumuStarBar()

Pythia8::Sigma2qqbar2numuStarnumuStarBar::Sigma2qqbar2numuStarnumuStarBar ( )
inline

Definition at line 166 of file Sigma2qqbar2lStarlStarBar.cxx.

166: Sigma2qqbar2lStarlStarBar(14) {}

Member Function Documentation

◆ code()

virtual int Pythia8::Sigma2qqbar2lStarlStarBar::code ( ) const
inlinevirtualinherited

Definition at line 143 of file Sigma2qqbar2lStarlStarBar.cxx.

143{return codeSave;}

◆ convert2mb()

virtual bool Pythia8::Sigma2qqbar2lStarlStarBar::convert2mb ( ) const
inlinevirtualinherited

Definition at line 149 of file Sigma2qqbar2lStarlStarBar.cxx.

149{return true;}

◆ convertM2()

virtual bool Pythia8::Sigma2qqbar2lStarlStarBar::convertM2 ( ) const
inlinevirtualinherited

Definition at line 148 of file Sigma2qqbar2lStarlStarBar.cxx.

148{return false;} //true is only suitable for resonance production pp->A->ll

◆ id3Mass()

virtual int Pythia8::Sigma2qqbar2lStarlStarBar::id3Mass ( ) const
inlinevirtualinherited

Definition at line 145 of file Sigma2qqbar2lStarlStarBar.cxx.

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

◆ id4Mass()

virtual int Pythia8::Sigma2qqbar2lStarlStarBar::id4Mass ( ) const
inlinevirtualinherited

Definition at line 146 of file Sigma2qqbar2lStarlStarBar.cxx.

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

◆ inFlux()

virtual std::string Pythia8::Sigma2qqbar2lStarlStarBar::inFlux ( ) const
inlinevirtualinherited

Definition at line 144 of file Sigma2qqbar2lStarlStarBar.cxx.

144{return "qqbarSame";}

◆ initProc()

void Pythia8::Sigma2qqbar2lStarlStarBar::initProc ( )
inlineinherited

Definition at line 52 of file Sigma2qqbar2lStarlStarBar.cxx.

52 {
53
54 // Set up process properties from the chosen lepton flavour.
55 idRes = 4000000 + idl;
56 codeSave = 4040 + idl;
57 if (idl == 11) nameSave = "q qbar -> e^*+- e^*-+";
58 else if (idl == 12) nameSave = "q qbar -> nu_e^* nu_e^*bar";
59 else if (idl == 13) nameSave = "q qbar -> mu^*+- mu^*-+";
60 else if (idl == 14) nameSave = "q qbar -> nu_mu^* nu_mu^*bar";
61 else if (idl == 15) nameSave = "q qbar -> tau^*+- tau^*-+";
62 else nameSave = "q qbar -> nu_tau^* nu_tau^*bar";
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) / 9.;
71
72 double mRes = particleDataPtr->m0(idRes);
73 m2ResTimes4 = mRes*mRes*4.;
74 }
M_PI
#define M_PI
Definition ActiveFraction.h:14

◆ name()

virtual std::string Pythia8::Sigma2qqbar2lStarlStarBar::name ( ) const
inlinevirtualinherited

Definition at line 142 of file Sigma2qqbar2lStarlStarBar.cxx.

142{return nameSave;}

◆ setIdColAcol()

void Pythia8::Sigma2qqbar2lStarlStarBar::setIdColAcol ( )
inlineinherited

Definition at line 96 of file Sigma2qqbar2lStarlStarBar.cxx.

96 {
97
98 // Flavours: both lepton and antilepton are excited.
99 setId( id1, id2, idRes, -idRes);
100 //if (id1 < 0) swapTU = true; // OI how is this used?
101
102 // Colour flow trivial.
103 if (id1 > 0) setColAcol( 1, 0, 0, 1, 0, 0, 0, 0);
104 else setColAcol( 0, 1, 1, 0, 0, 0, 0, 0);
105
106 }

◆ sigmaHat()

virtual double Pythia8::Sigma2qqbar2lStarlStarBar::sigmaHat ( )
inlinevirtualinherited

Definition at line 79 of file Sigma2qqbar2lStarlStarBar.cxx.

79{return sigma;}

◆ sigmaKin()

void Pythia8::Sigma2qqbar2lStarlStarBar::sigmaKin ( )
inlineinherited

Definition at line 83 of file Sigma2qqbar2lStarlStarBar.cxx.

83 {
84
85 // use assumption that sigma is multiplied later with sH*(1-s3/sH)
86
87 //sigma = preFac * sqrtpos( 1.- m2ResTimes4/sH );
88 sigma = preFac * sqrtpos( 1.- 4.*s3/sH );
89
90 }

◆ weightDecay()

double Pythia8::Sigma2qqbar2lStarlStarBar::weightDecay ( Event & process,
int iResBeg,
int iResEnd )
inlineinherited

Definition at line 110 of file Sigma2qqbar2lStarlStarBar.cxx.

111 {
112
113 // l* should sit in entry 5. and 6 Sequential Z/W decay assumed isotropic.
114 if (iResBeg != 5 && iResEnd != 5 && iResBeg != 6 && iResEnd != 6 ) return 1.;
115
116 // Phase space factors.
117 double mr1 = pow2(process[7].m() / process[5].m());
118 double mr2 = pow2(process[8].m() / process[5].m());
119
120 // Reconstruct decay angle in l* CoM frame.
121 int idAbs3 = process[7].idAbs();
122 Vec4 pLStarCom = (idAbs3 < 20) ? process[8].p() : process[7].p();
123 pLStarCom.bstback(process[5].p());
124 double cosThe = costheta(pLStarCom, process[5].p());
125 double wt = 1.;
126
127 // Decay, l* -> l + gamma/Z^0/W^+-).
128 int idBoson = (idAbs3 < 20) ? process[8].idAbs() : process[7].idAbs();
129 if (idBoson == 22) {
130 wt = 0.5 * (1. + cosThe);
131 } else if (idBoson == 23 || idBoson == 24) {
132 double mrB = (idAbs3 < 20) ? mr2 : mr1;
133 double kTrm = 0.5 * (mrB * (1. - cosThe));
134 wt = (1. + cosThe + kTrm) / (2 + mrB);
135 }
136
137 // Done.
138 return wt;
139 }
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::Sigma2qqbar2lStarlStarBar::codeSave
inherited

Definition at line 152 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ idl

int Pythia8::Sigma2qqbar2lStarlStarBar::idl
inherited

Definition at line 152 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ idRes

int Pythia8::Sigma2qqbar2lStarlStarBar::idRes
inherited

Definition at line 152 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ Lambda

double Pythia8::Sigma2qqbar2lStarlStarBar::Lambda
inherited

Definition at line 154 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ m2ResTimes4

double Pythia8::Sigma2qqbar2lStarlStarBar::m2ResTimes4
inherited

Definition at line 155 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ nameSave

std::string Pythia8::Sigma2qqbar2lStarlStarBar::nameSave
inherited

Definition at line 153 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ openFracNeg

double Pythia8::Sigma2qqbar2lStarlStarBar::openFracNeg
inherited

Definition at line 154 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ openFracPos

double Pythia8::Sigma2qqbar2lStarlStarBar::openFracPos
inherited

Definition at line 154 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ preFac

double Pythia8::Sigma2qqbar2lStarlStarBar::preFac
inherited

Definition at line 154 of file Sigma2qqbar2lStarlStarBar.cxx.

◆ sigma

double Pythia8::Sigma2qqbar2lStarlStarBar::sigma
inherited

Definition at line 154 of file Sigma2qqbar2lStarlStarBar.cxx.

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