/usr/include/Pythia8/Pythia8/SigmaExtraDim.h is in libpythia8-dev 8.1.86-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Copyright (C) 2014 Torbjorn Sjostrand.
// PYTHIA is licenced under the GNU GPL version 2, see COPYING for details.
// Please respect the MCnet Guidelines, see GUIDELINES for details.
// Author: Stefan Ask for the *LED* routines.
// Header file for extra-dimensional-process differential cross sections.
// Contains classes derived from SigmaProcess via Sigma(1/2)Process.
#ifndef Pythia8_SigmaExtraDim_H
#define Pythia8_SigmaExtraDim_H
#include "Pythia8/SigmaProcess.h"
namespace Pythia8 {
//==========================================================================
// A derived class for g g -> G^* (excited graviton state).
class Sigma1gg2GravitonStar : public Sigma1Process {
public:
// Constructor.
Sigma1gg2GravitonStar() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight for G* decay angle.
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return "g g -> G*";}
virtual int code() const {return 5001;}
virtual string inFlux() const {return "gg";}
virtual int resonanceA() const {return idGstar;}
private:
// Parameters set at initialization or for current kinematics.
bool eDsmbulk, eDvlvl;
int idGstar;
double mRes, GammaRes, m2Res, GamMRat, kappaMG, sigma;
// Couplings between graviton and SM (indexed by particle id).
double eDcoupling[27];
// Pointer to properties of the particle species, to access decay channels.
ParticleDataEntry* gStarPtr;
};
//==========================================================================
// A derived class for f fbar -> G^* (excited graviton state).
class Sigma1ffbar2GravitonStar : public Sigma1Process {
public:
// Constructor.
Sigma1ffbar2GravitonStar() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight for G* decay angle.
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return "f fbar -> G*";}
virtual int code() const {return 5002;}
virtual string inFlux() const {return "ffbarSame";}
virtual int resonanceA() const {return idGstar;}
private:
// Parameters set at initialization or for current kinematics.
bool eDsmbulk, eDvlvl;
int idGstar;
double mRes, GammaRes, m2Res, GamMRat, kappaMG, sigma0;
// Couplings between graviton and SM (indexed by particle id).
double eDcoupling[27];
// Pointer to properties of the particle species, to access decay channels.
ParticleDataEntry* gStarPtr;
};
//==========================================================================
// A derived class for q qbar -> g^*/KK-gluon^* (excited kk-gluon state).
class Sigma1qqbar2KKgluonStar : public Sigma1Process {
public:
// Constructor.
Sigma1qqbar2KKgluonStar() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight for g* decay angle.
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return "q qbar -> g*/KK-gluon*";}
virtual int code() const {return 5006;}
virtual string inFlux() const {return "qqbarSame";}
virtual int resonanceA() const {return idKKgluon;}
private:
// Parameters set at initialization or for current kinematics.
int idKKgluon;
double mRes, GammaRes, m2Res, GamMRat;
double sumSM, sumInt, sumKK, sigSM, sigInt, sigKK;
// Couplings between kk gluon and SM (indexed by particle id).
// Helicity dependent couplings. Use vector/axial-vector
// couplings internally, gv/ga = 0.5 * (gL +/- gR).
double eDgv[10], eDga[10];
// Interference parameter.
int interfMode;
// Pointer to properties of the particle species, to access decay
// channels.
ParticleDataEntry* gStarPtr;
};
//==========================================================================
// A derived class for g g -> G^* g (excited graviton state).
class Sigma2gg2GravitonStarg : public Sigma2Process {
public:
// Constructor.
Sigma2gg2GravitonStarg() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight: currently isotropic (except secondary top decay)..
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return "g g -> G* g";}
virtual int code() const {return 5003;}
virtual string inFlux() const {return "gg";}
virtual int id3Mass() const {return idGstar;}
private:
// Parameters set at initialization or for current kinematics.
int idGstar;
double mRes, GammaRes, m2Res, GamMRat, kappaMG, openFrac, sigma;
};
//==========================================================================
// A derived class for q g -> G^* q (excited graviton state).
class Sigma2qg2GravitonStarq : public Sigma2Process {
public:
// Constructor.
Sigma2qg2GravitonStarq() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight: currently isotropic (except secondary top decay).
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return "q g -> G* q";}
virtual int code() const {return 5004;}
virtual string inFlux() const {return "qg";}
virtual int id3Mass() const {return idGstar;}
private:
// Parameters set at initialization or for current kinematics.
int idGstar;
double mRes, GammaRes, m2Res, GamMRat, kappaMG, openFrac, sigma;
};
//==========================================================================
// A derived class for q qbar -> G^* g (excited graviton state).
class Sigma2qqbar2GravitonStarg : public Sigma2Process {
public:
// Constructor.
Sigma2qqbar2GravitonStarg() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight: currently isotropic (except secondary top decay).
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return "q qbar -> G* g";}
virtual int code() const {return 5005;}
virtual string inFlux() const {return "qqbarSame";}
virtual int id3Mass() const {return idGstar;}
private:
// Parameters set at initialization or for current kinematics.
int idGstar;
double mRes, GammaRes, m2Res, GamMRat, kappaMG, openFrac, sigma;
};
//==========================================================================
// NOAM: A derived class for, f fbar -> (gamma/Z)_KKTower -> F Fbar,
// for one heavy F.
// Process provided by N. Hod et al. and is described in arXiv:XXXX.YYYY
class Sigma2ffbar2TEVffbar : public Sigma2Process {
public:
// Constructor.
Sigma2ffbar2TEVffbar(int idIn, int codeIn) : idNew(idIn), codeSave(codeIn) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight for W decay angles in top decay (else inactive).
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return nameSave;}
virtual int code() const {return codeSave;}
virtual string inFlux() const {return "ffbarSame";}
virtual bool isSChannel() const {return true;}
virtual int idSChannel() const {return 5000023;}
virtual int resonanceA() const {return 23;}
virtual int resonanceB() const {return 5000023;}
virtual int id3Mass() const {return idNew;}
virtual int id4Mass() const {return idNew;}
// Add phase-space sampling also around the Z_KK resonance.
virtual int resonanceA();
virtual int resonanceB();
private:
// Values stored for process type.
string nameSave;
int idNew, gmZmode, codeSave, nexcitationmax;
bool isPhysical;
double gPlusf, gMinusf, gPlusF, gMinusF, gPlusTop, gMinusTop, gf, gF;
double mRes, m2Res, mStar, mTop, m2Top, mZKKn, m2ZKKn, m2gmKKn, mgmKKn,
alphaemfixed;
double helicityME2, coefTot, coefAngular;
double mr, betaf, cosThe, openFracPair;
double wgmKKFactor, wgmKKn, wZKKn,
wZ0, ttbarwZKKn, ttbarwgmKKn,
ttbarwFactorA, ttbarwFactorB;
double phaseSpacemHatMin, phaseSpacemHatMax;
complex gammaProp, resProp, gmPropKK, ZPropKK, totalProp;
complex mI;
};
//==========================================================================
// A derived class for g g -> U/G g (real graviton emission in
// large extra dimensions or unparticle emission).
class Sigma2gg2LEDUnparticleg : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2gg2LEDUnparticleg( bool Graviton ) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "g g -> G g" : "g g -> U g") ;}
virtual int code() const {return (eDgraviton ? 5021 : 5045);}
virtual string inFlux() const {return "gg";}
virtual int id3Mass() const {return 5000039;}
virtual int id4Mass() const {return 21;}
private:
bool eDgraviton;
int eDspin, eDnGrav, eDidG, eDcutoff;
double mG, mGS, eDsigma0, eDdU, eDLambdaU, eDlambda, eDconstantTerm,
eDtff, eDcf;
};
//==========================================================================
// A derived class for q g -> U/G q (real graviton emission in
// large extra dimensions or unparticle emission).
class Sigma2qg2LEDUnparticleq : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2qg2LEDUnparticleq( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "q g -> G q" : "q g -> U q") ;}
virtual int code() const {return (eDgraviton ? 5022 : 5046);}
virtual string inFlux() const {return "qg";}
virtual int id3Mass() const {return 5000039;}
private:
bool eDgraviton;
int eDspin, eDnGrav, eDidG, eDcutoff;
double mG, mGS, eDsigma0, eDdU, eDLambdaU, eDlambda, eDconstantTerm,
eDtff, eDgf, eDcf;
};
//==========================================================================
// A derived class for q qbar -> U/G g (real graviton emission in
// large extra dimensions or unparticle emission).
class Sigma2qqbar2LEDUnparticleg : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2qqbar2LEDUnparticleg( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "q qbar -> G g" : "q qbar -> U g") ;}
virtual int code() const {return (eDgraviton ? 5023 : 5047);}
virtual string inFlux() const {return "qqbarSame";}
virtual int id3Mass() const {return 5000039;}
virtual int id4Mass() const {return 21;}
private:
bool eDgraviton;
int eDspin, eDnGrav, eDidG, eDcutoff;
double mG, mGS, eDsigma0, eDdU, eDLambdaU, eDlambda, eDconstantTerm,
eDtff, eDgf, eDcf;
};
//==========================================================================
// A derived class for f fbar -> U/G Z (real graviton emission in
// large extra dimensions or unparticle emission).
class Sigma2ffbar2LEDUnparticleZ : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2ffbar2LEDUnparticleZ( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "f fbar -> G Z" : "f fbar -> U Z") ;}
virtual int code() const {return (eDgraviton ? 5024 : 5041);}
virtual string inFlux() const {return "ffbarSame";}
virtual int id3Mass() const {return 5000039;}
virtual int id4Mass() const {return 23;}
virtual int resonanceA() const {return 23;}
virtual int gmZmode() const {return 2;}
private:
// Constants: could only be changed in the code itself.
static const double FIXRATIO;
int eDspin, eDnGrav, eDcutoff, eDidG;
bool eDgraviton;
double eDdU, eDLambdaU, eDlambda, eDratio, eDlambdaPrime,
eDtff, eDconstantTerm;
double sHS, tHS, uHS, tHC, uHC, tHQ, uHQ, tHuH, mU, mUS, mZ, widZ,
mZS, mwZS, eDsigma0;
};
//==========================================================================
// A derived class for f fbar -> U/G gamma (real graviton emission in
// large extra dimensions or unparticle emission).
class Sigma2ffbar2LEDUnparticlegamma : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2ffbar2LEDUnparticlegamma( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "f fbar -> G gamma" : "f fbar -> U gamma") ;}
virtual int code() const {return (eDgraviton ? 5025 : 5042);}
virtual string inFlux() const {return "ffbarSame";}
virtual int id3Mass() const {return 5000039;}
virtual int id4Mass() const {return 22;}
private:
// Constants: could only be changed in the code itself.
static const double FIXRATIO;
int eDspin, eDnGrav, eDcutoff, eDidG;
bool eDgraviton;
double eDdU, eDLambdaU, eDlambda, eDratio, eDlambdaPrime,
eDtff, eDconstantTerm;
double sHS, tHS, uHS, tHC, uHC, tHQ, uHQ, tHuH, mU, mUS, mZ,
mZS, eDsigma0;
};
//==========================================================================
// A derived class for f fbar -> (LED G*/U*) -> gamma gamma
// (virtual graviton/unparticle exchange).
class Sigma2ffbar2LEDgammagamma : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2ffbar2LEDgammagamma( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "f fbar -> (LED G*) -> gamma gamma"
: "f fbar -> (U*) -> gamma gamma") ;}
virtual int code() const {return (eDgraviton ? 5026 : 5043);}
virtual string inFlux() const {return "ffbarSame";}
private:
int eDspin, eDcutoff, eDnGrav, eDnegInt;
bool eDgraviton;
double eDdU, eDLambdaU, eDlambda, eDlambda2chi,
eDterm1, eDterm2, eDterm3, eDtff;
};
//==========================================================================
// A derived class for g g -> (LED G*/U*) -> gamma gamma
// (virtual graviton/unparticle exchange).
class Sigma2gg2LEDgammagamma : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2gg2LEDgammagamma( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return (eDgraviton
? "g g -> (LED G*) -> gamma gamma" : "g g -> (U*) -> gamma gamma") ;}
virtual int code() const {return (eDgraviton ? 5027 : 5044);}
virtual string inFlux() const {return "gg";}
private:
int eDspin, eDcutoff, eDnGrav;
bool eDgraviton;
double eDdU, eDLambdaU, eDlambda, eDlambda2chi, eDsigma0, eDtff;
};
//==========================================================================
// A derived class for f fbar -> (LED G*/U*) -> l lbar
// (virtual graviton/unparticle exchange).
// Does not include t-channel contributions relevant for e^+e^- to e^+e^-
class Sigma2ffbar2LEDllbar : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2ffbar2LEDllbar( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "f fbar -> (LED G*) -> l l" : "f fbar -> (U*) -> l l") ;}
virtual int code() const {return (eDgraviton ? 5028 : 5048);}
virtual string inFlux() const {return "ffbarSame";}
virtual bool isSChannel() const {return true;}
private:
int eDspin, eDcutoff, eDnGrav,eDnxx, eDnxy, eDnegInt;
bool eDgraviton;
double eDdU, eDLambdaU, eDlambda, eDlambda2chi, eDtff,
eDmZ, eDmZS, eDGZ, eDGZS, eDabsMeU, eDdenomPropZ, eDrePropGamma,
eDrePropZ, eDimPropZ, eDabsAS, eDreA, eDreABW, eDpoly1, eDpoly2,
eDpoly3;
};
//==========================================================================
// A derived class for g g -> (LED G*/U*) -> l lbar
// (virtual graviton/unparticle exchange).
class Sigma2gg2LEDllbar : public Sigma2Process {
public:
// Constructor: bool Graviton = true, to use LED graviton settings.
Sigma2gg2LEDllbar( bool Graviton) : eDgraviton(Graviton) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section;
// first step when inflavours unknown.
virtual void sigmaKin();
// Evaluate sigmaHat(sHat); second step for given inflavours.
virtual double sigmaHat() {return eDsigma0;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return
(eDgraviton ? "g g -> (LED G*) -> l l" : "g g -> (U*) -> l l") ;}
virtual int code() const {return (eDgraviton ? 5029 : 5049);}
virtual string inFlux() const {return "gg";}
private:
int eDspin, eDcutoff, eDnGrav;
bool eDgraviton;
double eDdU, eDLambdaU, eDlambda, eDlambda2chi, eDsigma0, eDtff;
};
//==========================================================================
// A derived class for g g -> (LED G*) -> g g.
class Sigma2gg2LEDgg : public Sigma2Process {
public:
// Constructor.
Sigma2gg2LEDgg() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate d(sigmaHat)/d(tHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return "g g -> (LED G*) -> g g";}
virtual int code() const {return 5030;}
virtual string inFlux() const {return "gg";}
private:
// Values stored for colour flow selection.
double sigTS, sigUS, sigTU, sigSum, sigma;
// Model parameters.
int eDopMode, eDnGrav, eDcutoff, eDnegInt;
double eDMD, eDLambdaT, eDtff;
};
//==========================================================================
// A derived class for g g -> (LED G*) -> q qbar.
class Sigma2gg2LEDqqbar : public Sigma2Process {
public:
// Constructor.
Sigma2gg2LEDqqbar() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate d(sigmaHat)/d(tHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return "g g -> (LED G*) -> q qbar (uds)";}
virtual int code() const {return 5031;}
virtual string inFlux() const {return "gg";}
private:
// Number of quarks to be considered in massless approximation.
int nQuarkNew;
// Values stored for colour flow selection.
int idNew;
double mNew, m2New, sigTS, sigUS, sigSum, sigma;
// Model parameters.
int eDopMode, eDnGrav, eDcutoff, eDnegInt;
double eDMD, eDLambdaT, eDtff;
};
//==========================================================================
// A derived class for q g -> (LED G*) -> q g.
// Use massless approximation also for Q since no alternative.
class Sigma2qg2LEDqg : public Sigma2Process {
public:
// Constructor.
Sigma2qg2LEDqg() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate d(sigmaHat)/d(tHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return "q g -> (LED G*) -> q g";}
virtual int code() const {return 5032;}
virtual string inFlux() const {return "qg";}
private:
// Values stored for colour flow selection.
double sigTS, sigTU, sigSum, sigma;
// Model parameters.
int eDopMode, eDnGrav, eDcutoff, eDnegInt;
double eDMD, eDLambdaT, eDtff;
};
//==========================================================================
// A derived class for q q(bar)' -> (LED G*) -> q q(bar)'.
class Sigma2qq2LEDqq : public Sigma2Process {
public:
// Constructor.
Sigma2qq2LEDqq() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate d(sigmaHat)/d(tHat).
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return "q q(bar)' -> (LED G*) -> q q(bar)'";}
virtual int code() const {return 5033;}
virtual string inFlux() const {return "qq";}
private:
// Values stored for colour flow selection.
double sigT, sigU, sigTU, sigST, sigSum;
double sigGrT1, sigGrT2, sigGrU, sigGrTU, sigGrST;
// Model parameters.
int eDopMode, eDnGrav, eDcutoff, eDnegInt;
double eDMD, eDLambdaT, eDtff;
};
//==========================================================================
// A derived class for q qbar -> (LED G*) -> g g.
class Sigma2qqbar2LEDgg : public Sigma2Process {
public:
// Constructor.
Sigma2qqbar2LEDgg() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate d(sigmaHat)/d(tHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return "q qbar -> (LED G*) -> g g";}
virtual int code() const {return 5034;}
virtual string inFlux() const {return "qqbarSame";}
private:
// Values stored for colour flow selection.
double sigTS, sigUS, sigSum, sigma;
// Model parameters.
int eDopMode, eDnGrav, eDcutoff, eDnegInt;
double eDMD, eDLambdaT, eDtff;
};
//==========================================================================
// A derived class for q qbar -> (LED G*) -> q' qbar'.
class Sigma2qqbar2LEDqqbarNew : public Sigma2Process {
public:
// Constructor.
Sigma2qqbar2LEDqqbarNew() {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Evaluate d(sigmaHat)/d(tHat).
virtual double sigmaHat() {return sigma;}
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string name() const {return "q qbar -> (LED G*) -> q' qbar' (uds)";}
virtual int code() const {return 5035;}
virtual string inFlux() const {return "qqbarSame";}
private:
// Number of quarks to be considered in massless approximation.
int nQuarkNew;
// Values stored for colour flow selection.
int idNew;
double mNew, m2New, sigS, sigma;
// Model parameters.
int eDopMode, eDnGrav, eDcutoff;
double eDMD, eDLambdaT, eDtff;
};
//==========================================================================
} // end namespace Pythia8
#endif // Pythia8_SigmaExtraDim_H
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