/usr/include/Pythia8/Pythia8/SigmaOnia.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 charmonia/bottomonia process differential cross sections.
// Contains classes derived from SigmaProcess via Sigma2Process.
#ifndef Pythia8_SigmaOnia_H
#define Pythia8_SigmaOnia_H
#include "Pythia8/SigmaProcess.h"
namespace Pythia8 {
//==========================================================================
// A helper class used to setup the onia processes.
class SigmaOniaSetup {
public:
// Constructors.
SigmaOniaSetup() {};
SigmaOniaSetup(Info* infoPtrIn, Settings* settingsPtrIn,
ParticleData* particleDataPtrIn, int flavourIn);
// Initialise the SigmaProcesses for gg, qg, or qqbar production.
void setupSigma2gg(vector<SigmaProcess*> &procs, bool oniaIn = false);
void setupSigma2qg(vector<SigmaProcess*> &procs, bool oniaIn = false);
void setupSigma2qq(vector<SigmaProcess*> &procs, bool oniaIn = false);
private:
// Intialise and check settings.
void initStates(string wave, const vector<int> &states,
vector<int> &jnums, bool &valid);
void initSettings(string wave, unsigned int size,
const vector<string> &names, vector< vector<double> > &pvecs, bool &valid);
void initSettings(string wave, unsigned int size,
const vector<string> &names, vector< vector<bool> > &fvecs, bool &valid);
// Stored pointers.
Info* infoPtr;
Settings* settingsPtr;
ParticleData* particleDataPtr;
// Stored vectors of settings.
vector<int> states3S1, states3PJ, states3DJ, spins3S1, spins3PJ, spins3DJ;
vector<string> meNames3S1, meNames3PJ, meNames3DJ;
vector< vector<double> > mes3S1, mes3PJ, mes3DJ;
vector<string> ggNames3S1, qgNames3S1, qqNames3S1,
ggNames3PJ, qgNames3PJ, qqNames3PJ, ggNames3DJ, qgNames3DJ, qqNames3DJ;
vector< vector<bool> > ggs3S1, qgs3S1, qqs3S1, ggs3PJ, qgs3PJ, qqs3PJ,
ggs3DJ, qgs3DJ, qqs3DJ;
// Stored validity and production flags.
bool onia, onia3S1, onia3PJ, onia3DJ, oniaFlavour;
bool valid3S1, valid3PJ, valid3DJ;
int flavour;
string cat, key;
// Stored parameters.
double mSplit;
};
//==========================================================================
// A derived class for g g -> QQbar[3S1(1)] g (Q = c or b).
class Sigma2gg2QQbar3S11g : public Sigma2Process {
public:
// Constructor.
Sigma2gg2QQbar3S11g(int idHadIn, double oniumMEIn, int codeIn) :
idHad(abs(idHadIn)), codeSave(codeIn), oniumME(oniumMEIn) {}
// 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 nameSave;}
virtual int code() const {return codeSave;}
virtual string inFlux() const {return "gg";}
virtual int id3Mass() const {return idHad;}
private:
// Values stored for process type and colour flow selection.
int idHad, codeSave;
string nameSave;
double oniumME, sigma;
};
//==========================================================================
// A derived class for g g -> QQbar[3PJ(1)] g (Q = c or b, J = 0, 1 or 2).
class Sigma2gg2QQbar3PJ1g : public Sigma2Process {
public:
// Constructor.
Sigma2gg2QQbar3PJ1g(int idHadIn, double oniumMEIn, int jIn, int codeIn) :
idHad(idHadIn), jSave(jIn), codeSave(codeIn), oniumME(oniumMEIn) {}
// 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 nameSave;}
virtual int code() const {return codeSave;}
virtual string inFlux() const {return "gg";}
virtual int id3Mass() const {return idHad;}
protected:
// Name pre-, post-, and mid-fix.
virtual string namePrefix() const {return "g g";}
virtual string namePostfix() const {return "g";}
string nameMidfix() const {return (codeSave - codeSave%100)/100
== 4 ? "ccbar" : "bbbar";}
// Values stored for process type and colour flow selection.
int idHad, jSave, codeSave;
string nameSave;
double oniumME, sigma;
};
//==========================================================================
// A derived class for q g -> QQbar[3PJ(1)] q (Q = c or b, J = 0, 1 or 2).
class Sigma2qg2QQbar3PJ1q : public Sigma2gg2QQbar3PJ1g {
public:
// Constructor.
Sigma2qg2QQbar3PJ1q(int idHadIn, double oniumMEIn, int jIn, int codeIn) :
Sigma2gg2QQbar3PJ1g(idHadIn, oniumMEIn, jIn, codeIn) {}
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string inFlux() const {return "qg";}
protected:
// Name pre- and post-fix.
string namePrefix() const {return "q g";}
string namePostfix() const {return "q";}
};
//==========================================================================
// A derived class for q qbar -> QQbar[3PJ(1)] g (Q = c or b, J = 0, 1 or 2).
class Sigma2qqbar2QQbar3PJ1g : public Sigma2gg2QQbar3PJ1g {
public:
// Constructor.
Sigma2qqbar2QQbar3PJ1g(int idHadIn, double oniumMEIn, int jIn, int codeIn) :
Sigma2gg2QQbar3PJ1g(idHadIn, oniumMEIn, jIn, codeIn) {}
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string inFlux() const {return "qqbarSame";}
protected:
// Name pre- and post-fix.
string namePrefix() const {return "q qbar";}
string namePostfix() const {return "g";}
};
//==========================================================================
// A derived class for g g -> QQbar[3DJ(1)] g (Q = c or b).
class Sigma2gg2QQbar3DJ1g : public Sigma2gg2QQbar3PJ1g {
public:
// Constructor.
Sigma2gg2QQbar3DJ1g(int idHadIn, double oniumMEIn, int jIn, int codeIn) :
Sigma2gg2QQbar3PJ1g(idHadIn, oniumMEIn, jIn, codeIn) {}
// Initialize process.
virtual void initProc();
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
};
//==========================================================================
// A derived class for g g -> QQbar[X(8)] g (Q = c or b, X = 3S1, 1S0 or 3PJ).
class Sigma2gg2QQbarX8g : public Sigma2Process {
public:
// Constructor.
Sigma2gg2QQbarX8g(int idHadIn, double oniumMEIn, int stateIn,
double mSplitIn, int codeIn) : idHad(idHadIn), stateSave(stateIn),
codeSave(codeIn), oniumME(oniumMEIn), mSplit(mSplitIn) {}
// 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 nameSave;}
virtual int code() const {return codeSave;}
virtual string inFlux() const {return "gg";}
virtual int id3Mass() const {return idHad;}
protected:
// Name pre- and post-fix.
virtual string namePrefix() const {return "g g";}
virtual string namePostfix() const {return "g";}
// Values stored for process type and colour flow selection.
int idHad, stateSave, codeSave;
string nameSave;
double oniumME, sigma, mSplit;
};
//==========================================================================
// A derived class for q g -> QQbar[X(8)] q (Q = c or b, X = 3S1, 1S0 or 3PJ).
class Sigma2qg2QQbarX8q : public Sigma2gg2QQbarX8g {
public:
// Constructor.
Sigma2qg2QQbarX8q(int idHadIn, double oniumMEIn, int stateIn,
double mSplitIn, int codeIn) :
Sigma2gg2QQbarX8g(idHadIn, oniumMEIn, stateIn, mSplitIn, codeIn) {}
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string inFlux() const {return "qg";}
protected:
// Name pre- and post-fix.
virtual string namePrefix() const {return "q g";}
virtual string namePostfix() const {return "q";}
};
//==========================================================================
// A derived class for q qbar -> QQbar[X(8)] g (Q = c or b,
// X = 3S1, 1S0 or 3PJ).
class Sigma2qqbar2QQbarX8g : public Sigma2gg2QQbarX8g {
public:
// Constructor.
Sigma2qqbar2QQbarX8g(int idHadIn, double oniumMEIn, int stateIn,
double mSplitIn, int codeIn) :
Sigma2gg2QQbarX8g(idHadIn, oniumMEIn, stateIn, mSplitIn, codeIn) {}
// Calculate flavour-independent parts of cross section.
virtual void sigmaKin();
// Select flavour, colour and anticolour.
virtual void setIdColAcol();
// Info on the subprocess.
virtual string inFlux() const {return "qqbarSame";}
protected:
// Name pre- and post-fix.
virtual string namePrefix() const {return "q qbar";}
virtual string namePostfix() const {return "g";}
};
//==========================================================================
} // end namespace Pythia8
#endif // Pythia8_SigmaOnia_H
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