/usr/include/Pythia8/Pythia8/SigmaLeftRightSym.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.
// Header file for left-rights-symmetry differential cross sections.
// Contains classes derived from SigmaProcess via Sigma(1/2/3)Process.
#ifndef Pythia8_SigmaLeftRightSym_H
#define Pythia8_SigmaLeftRightSym_H
#include "Pythia8/SigmaProcess.h"
namespace Pythia8 {
//==========================================================================
// A derived class for f fbar -> Z_R^0 (righthanded gauge boson).
class Sigma1ffbar2ZRight : public Sigma1Process {
public:
// Constructor.
Sigma1ffbar2ZRight() {}
// 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 -> Z_R^0";}
virtual int code() const {return 3101;}
virtual string inFlux() const {return "ffbarSame";}
virtual int resonanceA() const {return idZR;}
private:
// Parameters set at initialization or for current kinematics.
int idZR;
double mRes, GammaRes, m2Res, GamMRat, sin2tW, sigma0;
// Pointer to properties of the particle species, to access decay channels.
ParticleDataEntry* ZRPtr;
};
//==========================================================================
// A derived class for f fbar' -> W_R^+- (righthanded gauge boson).
class Sigma1ffbar2WRight : public Sigma1Process {
public:
// Constructor.
Sigma1ffbar2WRight() {}
// 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 angle.
virtual double weightDecay( Event& process, int iResBeg, int iResEnd);
// Info on the subprocess.
virtual string name() const {return "f fbar' -> W_R^+-";}
virtual int code() const {return 3102;}
virtual string inFlux() const {return "ffbarChg";}
virtual int resonanceA() const {return idWR;}
private:
// Parameters set at initialization.
int idWR;
double mRes, GammaRes, m2Res, GamMRat, thetaWRat, sigma0Pos, sigma0Neg;
// Pointer to properties of the particle species, to access decay channels.
ParticleDataEntry* particlePtr;
};
//==========================================================================
// A derived class for l l -> H_L^++-- or H_R^++-- (doubly charged Higgs).
class Sigma1ll2Hchgchg : public Sigma1Process {
public:
// Constructor.
Sigma1ll2Hchgchg(int leftRightIn ) : leftRight(leftRightIn) {}
// Initialize process.
virtual void initProc();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight for W decay angle.
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 "ff";}
virtual int resonanceA() const {return idHLR;}
private:
// Parameters set at initialization.
int leftRight, idHLR, codeSave;
string nameSave;
double mRes, GammaRes, m2Res, GamMRat, yukawa[4][4];
// Pointer to properties of the particle species, to access decay channels.
ParticleDataEntry* particlePtr;
};
//==========================================================================
// A derived class for l- gamma -> H_(L/R)^-- l+ (doubly charged Higgs).
class Sigma2lgm2Hchgchgl : public Sigma2Process {
public:
// Constructor.
Sigma2lgm2Hchgchgl(int leftRightIn, int idLepIn ) : leftRight(leftRightIn),
idLep(idLepIn) {}
// Initialize process.
virtual void initProc();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight for W decay angle.
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 "fgm";}
virtual int resonanceA() const {return idHLR;}
private:
// Parameters set at initialization.
int leftRight, idHLR, idLep, codeSave;
string nameSave;
double yukawa[4], openFracPos, openFracNeg;
};
//==========================================================================
// A derived class for f_1 f_2 -> H_(L/R)^++-- f_3 f_4 (W+- W+- fusion).
class Sigma3ff2HchgchgfftWW : public Sigma3Process {
public:
// Constructor.
Sigma3ff2HchgchgfftWW(int leftRightIn) : leftRight(leftRightIn) {}
// 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 decay angles.
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 "ff";}
virtual int id3Mass() const {return idHLR;}
// Instructions for 3-body phase space with t-channel propagators.
virtual int idTchan1() const {return 9900024;}
virtual int idTchan2() const {return 9900024;}
virtual double tChanFracPow1() const {return 0.05;}
virtual double tChanFracPow2() const {return 0.9;}
virtual bool useMirrorWeight() const {return true;}
private:
// Store standard prefactor.
int leftRight, idHLR, codeSave;
string nameSave;
double mWS, prefac, sigma0TU, sigma0T, openFracPos, openFracNeg;
};
//==========================================================================
// A derived class for f fbar -> H_(L/R)^++ H_(L/R)^-- (doubly charged Higgs).
class Sigma2ffbar2HchgchgHchgchg : public Sigma2Process {
public:
// Constructor.
Sigma2ffbar2HchgchgHchgchg(int leftRightIn) : leftRight(leftRightIn) {}
// Initialize process.
virtual void initProc();
// Evaluate sigmaHat(sHat).
virtual double sigmaHat();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Evaluate weight for W decay angle.
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 int id3Mass() const {return idHLR;}
virtual int id4Mass() const {return idHLR;}
virtual int resonanceA() const {return 23;}
private:
// Parameters set at initialization.
int leftRight, idHLR, codeSave;
string nameSave;
double mRes, GammaRes, m2Res, GamMRat, sin2tW, preFac, yukawa[4][4],
openFrac;
};
//==========================================================================
} // end namespace Pythia8
#endif // Pythia8_SigmaLeftRightSym_H
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