ColorSingletModels.h

Go to the documentation of this file.

//****************************************************************************
//*                   This file is part of PandaRoot.                        *
//*                                                                          *
//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
//*                                                                          *
//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
//*     The copyright holders are listed in the file "COPYRIGHTHOLDERS".     *
//*               The authors are listed in the file "AUTHORS".              *
//****************************************************************************

/*
 * @author Alexey Luchinsky
 * @author Stanislav Poslavsky (stvlpos (at) mail.ru)
 */

#ifndef COLORSINGLETFACTORY_H
#define COLORSINGLETFACTORY_H

#include "ChiGenContext.h"
#include "PartonicModel.h"

using namespace Pythia8;

namespace chigen {

namespace models {

extern EvtSpinDensity createSpinDensity(int spin, int projection);

class ColorSingletPartonicModel : public PartonicModel {
 public:
  ColorSingletPartonicModel(double ecm, int pdgId, EvtId evtId, EvtSpinDensity spinDensity, double mesonMass, double particleR20, double particleMaxSigma);

  virtual double dsdt() { return 0.0; };

  virtual void setSigma();
  virtual bool setKin();

  bool setTrialKin();

  ClassDef(ColorSingletPartonicModel, 1);

 public:
  double __S__;
  double R20;
  double alpS;
  double Xmin, Xmax, Pfct;

  double PhSp;
  double sH2, tH2, uH2;
};

class chi_1 : public ColorSingletPartonicModel {
 public:
  chi_1() : ColorSingletPartonicModel(CHI1_MASS, CHI1_PDG_ID, chigen::evtgen::chi_c1_evt_id, createSpinDensity(1, -1), CHI1_MASS, R20_CHI, 2.07e-06) {}

  chi_1(double ecm) : ColorSingletPartonicModel(ecm, CHI1_PDG_ID, chigen::evtgen::chi_c1_evt_id, createSpinDensity(1, -1), CHI1_MASS, R20_CHI, 2.07e-06) {}

  virtual double dsdt()
  {
    return (128 * pow3(alpS) * M_PI * R20) / (9 * sH2 * pow3(mesonMass) * pow4(mesonMass2 - sH)) *
           ((sH + 4 * tH) * pow4(mesonMass) - 2 * (sH2 + 3 * tH * sH + 2 * tH2) * mesonMass2 + sH * (sH2 + 2 * tH * sH + 2 * tH2));
  }

  ClassDef(chi_1, 1);
};

class x3872 : public ColorSingletPartonicModel {
 public:
  x3872() : ColorSingletPartonicModel(X3872_MASS, X3872_PDG_ID, chigen::evtgen::x3872_evt_id, createSpinDensity(1, -1), X3872_MASS, R20_CHI, 2.07e-06) {}

  x3872(double ecm) : ColorSingletPartonicModel(ecm, X3872_PDG_ID, chigen::evtgen::x3872_evt_id, createSpinDensity(1, -1), X3872_MASS, R20_CHI, 2.07e-06) {}

  virtual double dsdt()
  {
    return (128 * pow3(alpS) * M_PI * R20) / (9 * sH2 * pow3(mesonMass) * pow4(mesonMass2 - sH)) *
           ((sH + 4 * tH) * pow4(mesonMass) - 2 * (sH2 + 3 * tH * sH + 2 * tH2) * mesonMass2 + sH * (sH2 + 2 * tH * sH + 2 * tH2));
  }

  ClassDef(x3872, 1);
};

class chi_1_0 : public ColorSingletPartonicModel {
 public:
  chi_1_0() : ColorSingletPartonicModel(CHI1_MASS, CHI1_PDG_ID, chigen::evtgen::chi_c1_evt_id, createSpinDensity(1, 0), CHI1_MASS, R20_CHI, 1.38e-06) {}

  chi_1_0(double ecm) : ColorSingletPartonicModel(ecm, CHI1_PDG_ID, chigen::evtgen::chi_c1_evt_id, createSpinDensity(1, 0), CHI1_MASS, R20_CHI, 1.38e-06) {}

  virtual double dsdt() { return (128 * M_PI * R20 * pow3(alpS) * (tH2 + uH2)) / (9 * pow3(mesonMass) * sH * pow4(-mesonMass2 + sH)); }

  ClassDef(chi_1_0, 1);
};

class x3872_0 : public ColorSingletPartonicModel {
 public:
  x3872_0() : ColorSingletPartonicModel(X3872_MASS, X3872_PDG_ID, chigen::evtgen::x3872_evt_id, createSpinDensity(1, 0), X3872_MASS, R20_CHI, 2.07e-06) {}

  x3872_0(double ecm) : ColorSingletPartonicModel(ecm, X3872_PDG_ID, chigen::evtgen::x3872_evt_id, createSpinDensity(1, 0), X3872_MASS, R20_CHI, 2.07e-06) {}

  virtual double dsdt() { return (128 * M_PI * R20 * pow3(alpS) * (tH2 + uH2)) / (9 * pow3(mesonMass) * sH * pow4(-mesonMass2 + sH)); }

  ClassDef(x3872_0, 1);
};

class chi_1_1 : public ColorSingletPartonicModel {
 public:
  chi_1_1() : ColorSingletPartonicModel(CHI1_MASS, CHI1_PDG_ID, chigen::evtgen::chi_c1_evt_id, createSpinDensity(1, 1), CHI1_MASS, R20_CHI, 1.36e-06) {}

  chi_1_1(double ecm) : ColorSingletPartonicModel(ecm, CHI1_PDG_ID, chigen::evtgen::chi_c1_evt_id, createSpinDensity(1, 1), CHI1_MASS, R20_CHI, 1.36e-06) {}

  virtual double dsdt() { return (512 * M_PI * pow3(alpS) * R20 * uH * tH) / (9 * mesonMass * sH2 * pow4(-mesonMass2 + sH)); }

  ClassDef(chi_1_1, 1);
};

class x3872_1 : public ColorSingletPartonicModel {
 public:
  x3872_1() : ColorSingletPartonicModel(X3872_MASS, X3872_PDG_ID, chigen::evtgen::x3872_evt_id, createSpinDensity(1, 1), X3872_MASS, R20_CHI, 2.07e-06) {}

  x3872_1(double ecm) : ColorSingletPartonicModel(ecm, X3872_PDG_ID, chigen::evtgen::x3872_evt_id, createSpinDensity(1, 1), X3872_MASS, R20_CHI, 2.07e-06) {}

  virtual double dsdt() { return (512 * M_PI * pow3(alpS) * R20 * uH * tH) / (9 * mesonMass * sH2 * pow4(-mesonMass2 + sH)); }

  ClassDef(x3872_1, 1);
};

class chi_2 : public ColorSingletPartonicModel {
 public:
  chi_2() : ColorSingletPartonicModel(CHI2_MASS, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, -1), CHI2_MASS, R20_CHI, 3.65e-06) {}

  chi_2(double ecm) : ColorSingletPartonicModel(ecm, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, -1), CHI2_MASS, R20_CHI, 3.65e-06) {}

  virtual double dsdt()
  {
    return (128 * M_PI * pow3(alpS) * R20 *
            (6 * pow4(mesonMass2) - 12 * pow3(mesonMass2) * (sH + tH) + sH2 * (sH2 + 2 * sH * tH + 2 * tH2) - 2 * mesonMass2 * sH * (sH2 + 7 * sH * tH + 6 * tH2) +
             pow2(mesonMass2) * (7 * sH2 + 24 * sH * tH + 12 * tH2))) /
           (27 * pow3(mesonMass) * pow4(mesonMass2 - sH) * pow3(sH));
  }

  ClassDef(chi_2, 1);
};

class chi_2_0 : public ColorSingletPartonicModel {
 public:
  chi_2_0() : ColorSingletPartonicModel(CHI2_MASS, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, 0), CHI2_MASS, R20_CHI, 5.25e-07) {}

  chi_2_0(double ecm) : ColorSingletPartonicModel(ecm, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, 0), CHI2_MASS, R20_CHI, 5.25e-07) {}

  virtual double dsdt() { return (128 * M_PI * R20 * pow3(alpS) * (tH2 + uH2)) / (27 * pow3(mesonMass) * pow4(mesonMass2 - sH) * sH); }

  ClassDef(chi_2_0, 1);
};

class chi_2_1 : public ColorSingletPartonicModel {
 public:
  chi_2_1() : ColorSingletPartonicModel(CHI2_MASS, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, 1), CHI2_MASS, R20_CHI, 1.58e-06) {}

  chi_2_1(double ecm) : ColorSingletPartonicModel(ecm, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, 1), CHI2_MASS, R20_CHI, 1.58e-06) {}

  virtual double dsdt() { return (512 * M_PI * pow3(alpS) * R20 * uH * tH) / (9 * mesonMass * pow4(mesonMass2 - sH) * sH2); }

  ClassDef(chi_2_1, 1);
};

class chi_2_2 : public ColorSingletPartonicModel {
 public:
  chi_2_2() : ColorSingletPartonicModel(CHI2_MASS, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, 2), CHI2_MASS, R20_CHI, 3.1e-06) {}

  chi_2_2(double ecm) : ColorSingletPartonicModel(ecm, CHI2_PDG_ID, chigen::evtgen::chi_c2_evt_id, createSpinDensity(2, 2), CHI2_MASS, R20_CHI, 3.1e-06) {}

  virtual double dsdt() { return (256 * mesonMass * M_PI * pow3(alpS) * R20 * (tH2 + uH2)) / (9 * pow4(mesonMass2 - sH) * pow3(sH)); }

  ClassDef(chi_2_2, 1);
};
} // namespace models
} // namespace chigen
#endif /* COLORSINGLETFACTORY_H */