1 | // SigmaLeftRightSym.h is a part of the PYTHIA event generator. |
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2 | // Copyright (C) 2012 Torbjorn Sjostrand. |
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3 | // PYTHIA is licenced under the GNU GPL version 2, see COPYING for details. |
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4 | // Please respect the MCnet Guidelines, see GUIDELINES for details. |
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5 | |
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6 | // Header file for left-rights-symmetry differential cross sections. |
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7 | // Contains classes derived from SigmaProcess via Sigma(1/2/3)Process. |
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8 | |
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9 | #ifndef Pythia8_SigmaLeftRightSym_H |
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10 | #define Pythia8_SigmaLeftRightSym_H |
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11 | |
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12 | #include "SigmaProcess.h" |
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13 | |
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14 | namespace Pythia8 { |
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15 | |
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16 | //========================================================================== |
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17 | |
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18 | // A derived class for f fbar -> Z_R^0 (righthanded gauge boson). |
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19 | |
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20 | class Sigma1ffbar2ZRight : public Sigma1Process { |
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21 | |
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22 | public: |
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23 | |
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24 | // Constructor. |
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25 | Sigma1ffbar2ZRight() {} |
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26 | |
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27 | // Initialize process. |
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28 | virtual void initProc(); |
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29 | |
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30 | // Calculate flavour-independent parts of cross section. |
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31 | virtual void sigmaKin(); |
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32 | |
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33 | // Evaluate sigmaHat(sHat). |
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34 | virtual double sigmaHat(); |
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35 | |
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36 | // Select flavour, colour and anticolour. |
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37 | virtual void setIdColAcol(); |
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38 | |
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39 | // Evaluate weight for G* decay angle. |
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40 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
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41 | |
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42 | // Info on the subprocess. |
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43 | virtual string name() const {return "f fbar -> Z_R^0";} |
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44 | virtual int code() const {return 3101;} |
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45 | virtual string inFlux() const {return "ffbarSame";} |
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46 | virtual int resonanceA() const {return idZR;} |
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47 | |
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48 | private: |
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49 | |
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50 | // Parameters set at initialization or for current kinematics. |
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51 | int idZR; |
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52 | double mRes, GammaRes, m2Res, GamMRat, sin2tW, sigma0; |
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53 | |
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54 | // Pointer to properties of the particle species, to access decay channels. |
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55 | ParticleDataEntry* ZRPtr; |
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56 | |
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57 | }; |
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58 | |
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59 | //========================================================================== |
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60 | |
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61 | // A derived class for f fbar' -> W_R^+- (righthanded gauge boson). |
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62 | |
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63 | class Sigma1ffbar2WRight : public Sigma1Process { |
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64 | |
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65 | public: |
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66 | |
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67 | // Constructor. |
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68 | Sigma1ffbar2WRight() {} |
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69 | |
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70 | // Initialize process. |
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71 | virtual void initProc(); |
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72 | |
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73 | // Calculate flavour-independent parts of cross section. |
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74 | virtual void sigmaKin(); |
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75 | |
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76 | // Evaluate sigmaHat(sHat). |
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77 | virtual double sigmaHat(); |
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78 | |
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79 | // Select flavour, colour and anticolour. |
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80 | virtual void setIdColAcol(); |
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81 | |
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82 | // Evaluate weight for W decay angle. |
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83 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
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84 | |
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85 | // Info on the subprocess. |
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86 | virtual string name() const {return "f fbar' -> W_R^+-";} |
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87 | virtual int code() const {return 3102;} |
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88 | virtual string inFlux() const {return "ffbarChg";} |
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89 | virtual int resonanceA() const {return idWR;} |
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90 | |
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91 | private: |
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92 | |
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93 | // Parameters set at initialization. |
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94 | int idWR; |
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95 | double mRes, GammaRes, m2Res, GamMRat, thetaWRat, sigma0Pos, sigma0Neg; |
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96 | |
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97 | // Pointer to properties of the particle species, to access decay channels. |
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98 | ParticleDataEntry* particlePtr; |
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99 | |
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100 | }; |
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101 | |
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102 | //========================================================================== |
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103 | |
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104 | // A derived class for l l -> H_L^++-- or H_R^++-- (doubly charged Higgs). |
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105 | |
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106 | class Sigma1ll2Hchgchg : public Sigma1Process { |
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107 | |
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108 | public: |
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109 | |
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110 | // Constructor. |
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111 | Sigma1ll2Hchgchg(int leftRightIn ) : leftRight(leftRightIn) {} |
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112 | |
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113 | // Initialize process. |
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114 | virtual void initProc(); |
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115 | |
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116 | // Evaluate sigmaHat(sHat). |
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117 | virtual double sigmaHat(); |
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118 | |
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119 | // Select flavour, colour and anticolour. |
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120 | virtual void setIdColAcol(); |
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121 | |
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122 | // Evaluate weight for W decay angle. |
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123 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
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124 | |
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125 | // Info on the subprocess. |
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126 | virtual string name() const {return nameSave;} |
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127 | virtual int code() const {return codeSave;} |
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128 | virtual string inFlux() const {return "ff";} |
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129 | virtual int resonanceA() const {return idHLR;} |
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130 | |
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131 | private: |
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132 | |
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133 | // Parameters set at initialization. |
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134 | int leftRight, idHLR, codeSave; |
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135 | string nameSave; |
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136 | double mRes, GammaRes, m2Res, GamMRat, thetaWRat, yukawa[4][4]; |
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137 | |
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138 | // Pointer to properties of the particle species, to access decay channels. |
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139 | ParticleDataEntry* particlePtr; |
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140 | |
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141 | }; |
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142 | |
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143 | //========================================================================== |
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144 | |
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145 | // A derived class for l- gamma -> H_(L/R)^-- l+ (doubly charged Higgs). |
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146 | |
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147 | class Sigma2lgm2Hchgchgl : public Sigma2Process { |
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148 | |
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149 | public: |
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150 | |
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151 | // Constructor. |
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152 | Sigma2lgm2Hchgchgl(int leftRightIn, int idLepIn ) : leftRight(leftRightIn), |
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153 | idLep(idLepIn) {} |
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154 | |
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155 | // Initialize process. |
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156 | virtual void initProc(); |
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157 | |
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158 | // Evaluate sigmaHat(sHat). |
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159 | virtual double sigmaHat(); |
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160 | |
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161 | // Select flavour, colour and anticolour. |
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162 | virtual void setIdColAcol(); |
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163 | |
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164 | // Evaluate weight for W decay angle. |
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165 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
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166 | |
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167 | // Info on the subprocess. |
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168 | virtual string name() const {return nameSave;} |
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169 | virtual int code() const {return codeSave;} |
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170 | virtual string inFlux() const {return "fgm";} |
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171 | virtual int resonanceA() const {return idHLR;} |
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172 | |
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173 | private: |
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174 | |
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175 | // Parameters set at initialization. |
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176 | int leftRight, idHLR, idLep, codeSave; |
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177 | string nameSave; |
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178 | double yukawa[4], openFracPos, openFracNeg; |
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179 | |
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180 | }; |
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181 | |
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182 | //========================================================================== |
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183 | |
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184 | // A derived class for f_1 f_2 -> H_(L/R)^++-- f_3 f_4 (W+- W+- fusion). |
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185 | |
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186 | class Sigma3ff2HchgchgfftWW : public Sigma3Process { |
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187 | |
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188 | public: |
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189 | |
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190 | // Constructor. |
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191 | Sigma3ff2HchgchgfftWW(int leftRightIn) : leftRight(leftRightIn) {} |
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192 | |
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193 | // Initialize process. |
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194 | virtual void initProc(); |
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195 | |
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196 | // Calculate flavour-independent parts of cross section. |
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197 | virtual void sigmaKin(); |
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198 | |
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199 | // Evaluate sigmaHat(sHat). |
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200 | virtual double sigmaHat(); |
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201 | |
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202 | // Select flavour, colour and anticolour. |
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203 | virtual void setIdColAcol(); |
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204 | |
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205 | // Evaluate weight for decay angles. |
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206 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
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207 | |
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208 | // Info on the subprocess. |
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209 | virtual string name() const {return nameSave;} |
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210 | virtual int code() const {return codeSave;} |
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211 | virtual string inFlux() const {return "ff";} |
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212 | virtual int id3Mass() const {return idHLR;} |
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213 | |
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214 | // Instructions for 3-body phase space with t-channel propagators. |
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215 | virtual int idTchan1() const {return 9900024;} |
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216 | virtual int idTchan2() const {return 9900024;} |
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217 | virtual double tChanFracPow1() const {return 0.05;} |
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218 | virtual double tChanFracPow2() const {return 0.9;} |
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219 | virtual bool useMirrorWeight() const {return true;} |
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220 | |
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221 | private: |
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222 | |
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223 | // Store standard prefactor. |
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224 | int leftRight, idHLR, codeSave; |
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225 | string nameSave; |
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226 | double mWS, prefac, sigma0TU, sigma0T, openFracPos, openFracNeg; |
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227 | |
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228 | }; |
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229 | |
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230 | //========================================================================== |
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231 | |
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232 | // A derived class for f fbar -> H_(L/R)^++ H_(L/R)^-- (doubly charged Higgs). |
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233 | |
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234 | class Sigma2ffbar2HchgchgHchgchg : public Sigma2Process { |
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235 | |
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236 | public: |
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237 | |
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238 | // Constructor. |
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239 | Sigma2ffbar2HchgchgHchgchg(int leftRightIn) : leftRight(leftRightIn) {} |
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240 | |
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241 | // Initialize process. |
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242 | virtual void initProc(); |
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243 | |
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244 | // Evaluate sigmaHat(sHat). |
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245 | virtual double sigmaHat(); |
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246 | |
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247 | // Select flavour, colour and anticolour. |
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248 | virtual void setIdColAcol(); |
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249 | |
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250 | // Evaluate weight for W decay angle. |
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251 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
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252 | |
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253 | // Info on the subprocess. |
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254 | virtual string name() const {return nameSave;} |
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255 | virtual int code() const {return codeSave;} |
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256 | virtual string inFlux() const {return "ffbarSame";} |
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257 | virtual int id3Mass() const {return idHLR;} |
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258 | virtual int id4Mass() const {return idHLR;} |
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259 | virtual int resonanceA() const {return 23;} |
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260 | |
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261 | private: |
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262 | |
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263 | // Parameters set at initialization. |
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264 | int leftRight, idHLR, codeSave; |
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265 | string nameSave; |
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266 | double mRes, GammaRes, m2Res, GamMRat, sin2tW, preFac, yukawa[4][4], |
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267 | openFrac; |
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268 | |
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269 | }; |
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270 | |
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271 | //========================================================================== |
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272 | |
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273 | } // end namespace Pythia8 |
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274 | |
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275 | #endif // Pythia8_SigmaLeftRightSym_H |
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