# HelaS: HELAS_diffs.txt

File HELAS_diffs.txt, 6.5 KB (added by anonymous, 7 years ago) |
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1 | --------------------------------------------------------------------------------------- |

2 | 2007-06-02: Differences between the old smadgraph HELAS (from the smadgrapg website) |

3 | and the MG/MEv4 HELAS. |

4 | --------------------------------------------------------------------------------------- |

5 | |

6 | These files/routines are in the smadgraph helas, but not in the madgraph. |

7 | fvidmt.F |

8 | fvodmt.F |

9 | hvvxxu.F |

10 | iovdmt.F |

11 | |

12 | |

13 | These files/routines are in the madgraph helas, but not in the smadgraph. |

14 | hstlxx.F --> 2 Higgs Effective theory (2heft), not tested for the pseudo-scalar higgs's |

15 | httsxx.F --> 2heft |

16 | httxxx.F --> Higgs Effective theory (heft) |

17 | hvvhxx.F --> heft |

18 | hvvshx.F --> 2heft |

19 | hvvtxx.F --> old routine, replaced by uvvxxx.F |

20 | hvvvxx.F --> heft |

21 | jvshxx.F --> heft |

22 | jvsshx.F --> 2heft |

23 | jvstxx.F --> heft |

24 | jvtxxx.F --> heft |

25 | jvvsxx.F --> heft |

26 | jvvtlx.F --> 2heft |

27 | ssstxx.F --> old routine, replaced by ttsxxx.F |

28 | sstlxx.F --> 2heft |

29 | ttssxx.F --> 2heft |

30 | ttsxxx.F --> heft |

31 | usslxx.F --> 2heft |

32 | utssxx.F --> 2heft |

33 | utsxxx.F --> heft |

34 | uvvvlx.F --> 2heft |

35 | uvvxxx.F --> heft |

36 | vvshxx.F --> heft |

37 | vvsshx.F --> 2heft |

38 | vvstxx.F --> old routine, replaced by vvtxx.F |

39 | vvtxxx.F --> heft |

40 | vvvsxx.F --> heft |

41 | vvvtlx.F --> 2heft |

42 | dimensions.inc --> A file in which the dimensions of the wavefunctions of the above routines are specified. |

43 | |

44 | See also the HELAS_HEFT.ps file with the description/manual of these routines. |

45 | |

46 | |

47 | |

48 | These are the files/routines that are different in the smadgraph and the madgraph helas: |

49 | ggggxx.F |

50 | hioxxx.F |

51 | j3xxxx.F |

52 | jioxxx.F |

53 | jssxxx.F |

54 | jvssxx.F |

55 | jvsxxx.F |

56 | jvvxxx.F |

57 | jw3wxx.F |

58 | jwwwxx.F |

59 | |

60 | **The difference is mainly the implementation of the finite width of the vector bosons.** |

61 | Here are the diff's between the files: |

62 | |

63 | desktop:~$ diff smadgraph/ggggxx.F MG_ME_V4.1.33/HELAS/ggggxx.F |

64 | 29a30,32 |

65 | save dv1,dv2,dv3, dv4 |

66 | c save dv1,dv2,dv3,dv4,dvertx,v12,v13,v14,v23,v24,v34 |

67 | |

68 | 132a136,141 |

69 | |

70 | c if (abs(dvertx) .gt. 1d40) then |

71 | c write(*,*) 'Careful',abs(dvertx) |

72 | c write(*,*) v12,v13,v14 |

73 | c write(*,*) v23,v24,v34 |

74 | c endif |

75 | |

76 | |

77 | desktop:~$ diff smadgraph/hioxxx.F MG_ME_V4.1.33/HELAS/hioxxx.F |

78 | 21c21 |

79 | < double precision rZero |

80 | --- |

81 | double precision rZero, cZero |

82 | |

83 | |

84 | desktop:~$ diff smadgraph/j3xxxx.F MG_ME_V4.1.33/HELAS/j3xxxx.F |

85 | 23a24 |

86 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

87 | 132a134,135 |

88 | |

89 | |

90 | 146,147d148 |

91 | < csl = (q(0)*c0l-q(1)*c1l-q(2)*c2l-q(3)*c3l)/zm2 |

92 | < csr = (q(0)*c0r-q(1)*c1r-q(2)*c2r-q(3)*c3r)/zm2 |

93 | 148a150,156 |

94 | c Fabio's implementation of the fixed width |

95 | cm2=dcmplx( zm2, -zmw ) |

96 | c csl = (q(0)*c0l-q(1)*c1l-q(2)*c2l-q(3)*c3l)/zm2 |

97 | c csr = (q(0)*c0r-q(1)*c1r-q(2)*c2r-q(3)*c3r)/zm2 |

98 | csl = (q(0)*c0l-q(1)*c1l-q(2)*c2l-q(3)*c3l)/cm2 |

99 | csr = (q(0)*c0r-q(1)*c1r-q(2)*c2r-q(3)*c3r)/cm2 |

100 | |

101 | |

102 | |

103 | desktop:~$ diff smadgraph/jioxxx.F MG_ME_V4.1.33/HELAS/jioxxx.F |

104 | 19a20,21 |

105 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

106 | |

107 | 92,93c94,96 |

108 | < c For the running width, use below instead of the above d. |

109 | < c d = rOne/dcmplx( q2-vm2, max(vwidth*q2/vmass,rZero) ) |

110 | --- |

111 | c For the running width, use below instead of the above d. |

112 | c d = rOne/dcmplx( q2-vm2, max(vwidth*q2/vmass,rZero) ) |

113 | |

114 | 111c114,118 |

115 | < cs = (q(0)*c0-q(1)*c1-q(2)*c2-q(3)*c3)/vm2 |

116 | --- |

117 | |

118 | c Fabio's implementation of the fixed width |

119 | cm2=dcmplx( vm2, -vmass*vwidth ) |

120 | c cs = (q(0)*c0-q(1)*c1-q(2)*c2-q(3)*c3)/vm2 |

121 | cs = (q(0)*c0-q(1)*c1-q(2)*c2-q(3)*c3)/cm2 |

122 | |

123 | |

124 | |

125 | |

126 | desktop:~$ diff smadgraph/jssxxx.F MG_ME_V4.1.33/HELAS/jssxxx.F |

127 | 34a35 |

128 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

129 | 111a113 |

130 | |

131 | 126,129c128,137 |

132 | < jss(1) = adg*( (pp(0)-pa(0)) - q(0)*m2d/vm2) |

133 | < jss(2) = adg*( (pp(1)-pa(1)) - q(1)*m2d/vm2) |

134 | < jss(3) = adg*( (pp(2)-pa(2)) - q(2)*m2d/vm2) |

135 | < jss(4) = adg*( (pp(3)-pa(3)) - q(3)*m2d/vm2) |

136 | --- |

137 | c Fabio's implementation of the fixed width |

138 | cm2=dcmplx( vm2, -vmass*vwidth ) |

139 | c jss(1) = adg*( (pp(0)-pa(0)) - q(0)*m2d/vm2) |

140 | c jss(2) = adg*( (pp(1)-pa(1)) - q(1)*m2d/vm2) |

141 | c jss(3) = adg*( (pp(2)-pa(2)) - q(2)*m2d/vm2) |

142 | c jss(4) = adg*( (pp(3)-pa(3)) - q(3)*m2d/vm2) |

143 | jss(1) = adg*( (pp(0)-pa(0)) - q(0)*m2d/cm2) |

144 | jss(2) = adg*( (pp(1)-pa(1)) - q(1)*m2d/cm2) |

145 | jss(3) = adg*( (pp(2)-pa(2)) - q(2)*m2d/cm2) |

146 | jss(4) = adg*( (pp(3)-pa(3)) - q(3)*m2d/cm2) |

147 | |

148 | |

149 | |

150 | |

151 | desktop:~$ diff smadgraph/jvssxx.F MG_ME_V4.1.33/HELAS/jvssxx.F |

152 | 20,21c20,22 |

153 | < double complex vc(6),s1(3),s2(3),gc,jvss(6),dg,vk |

154 | < double precision q(0:3),vmass,vwidth,q2,vm2 |

155 | --- |

156 | double complex vc(6),s1(3),s2(3),gc,jvss(6),dg |

157 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

158 | double precision q(0:3),vmass,vwidth,q2,vk,vm2 |

159 | 104c105,108 |

160 | < vk = (q(0)*vc(1)-q(1)*vc(2)-q(2)*vc(3)-q(3)*vc(4))/vm2 |

161 | --- |

162 | c Fabio's implementation of the fixed width |

163 | cm2=dcmplx( vm2, -vmass*vwidth ) |

164 | c vk = (q(0)*vc(1)-q(1)*vc(2)-q(2)*vc(3)-q(3)*vc(4))/vm2 |

165 | vk = (q(0)*vc(1)-q(1)*vc(2)-q(2)*vc(3)-q(3)*vc(4))/cm2 |

166 | |

167 | |

168 | |

169 | desktop:~$ diff smadgraph/jvsxxx.F MG_ME_V4.1.33/HELAS/jvsxxx.F |

170 | 18a19 |

171 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

172 | 95c96,99 |

173 | < vk = (-q(0)*vc(1)+q(1)*vc(2)+q(2)*vc(3)+q(3)*vc(4))/vm2 |

174 | --- |

175 | c Fabio's implementation of the fixed width |

176 | cm2=dcmplx( vm2, -vmass*vwidth ) |

177 | c vk = (-q(0)*vc(1)+q(1)*vc(2)+q(2)*vc(3)+q(3)*vc(4))/vm2 |

178 | vk = (-q(0)*vc(1)+q(1)*vc(2)+q(2)*vc(3)+q(3)*vc(4))/cm2 |

179 | |

180 | |

181 | |

182 | desktop:~$ diff smadgraph/jvvxxx.F MG_ME_V4.1.33/HELAS/jvvxxx.F |

183 | 29a30 |

184 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

185 | 125d125 |

186 | < js = (v12*(-m1+m2) +s11*s12 -s21*s22)/vm2 |

187 | 126a127,131 |

188 | c Fabio's implementation of the fixed width |

189 | cm2=dcmplx( vm2, -vmass*vwidth ) |

190 | c js = (v12*(-m1+m2) +s11*s12 -s21*s22)/vm2 |

191 | js = (v12*(-m1+m2) +s11*s12 -s21*s22)/cm2 |

192 | |

193 | |

194 | |

195 | |

196 | desktop:~$ diff smadgraph/jw3wxx.F MG_ME_V4.1.33/HELAS/jw3wxx.F |

197 | 53a54 |

198 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

199 | 201,202c202,206 |

200 | < jq = (jj(0)*q(0)-jj(1)*q(1)-jj(2)*q(2)-jj(3)*q(3))/mv2 |

201 | < |

202 | --- |

203 | c Fabio's implementation of the fixed width |

204 | cm2=dcmplx( mv2, -dmv*dwv) |

205 | c jq = (jj(0)*q(0)-jj(1)*q(1)-jj(2)*q(2)-jj(3)*q(3))/mv2 |

206 | jq = (jj(0)*q(0)-jj(1)*q(1)-jj(2)*q(2)-jj(3)*q(3))/cm2 |

207 | |

208 | |

209 | |

210 | desktop:~$ diff smadgraph/jwwwxx.F MG_ME_V4.1.33/HELAS/jwwwxx.F |

211 | 34a35 |

212 | double complex cm2 ! mass**2- I Gamma mass (Fabio) |

213 | 165c166,169 |

214 | < jq = (jj(0)*q(0)-jj(1)*q(1)-jj(2)*q(2)-jj(3)*q(3))/mw2 |

215 | --- |

216 | c Fabio's implementation of the fixed width |

217 | cm2=dcmplx( mw2, -dmw*dww ) |

218 | c jq = (jj(0)*q(0)-jj(1)*q(1)-jj(2)*q(2)-jj(3)*q(3))/mw2 |

219 | jq = (jj(0)*q(0)-jj(1)*q(1)-jj(2)*q(2)-jj(3)*q(3))/cm2 |

220 |