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28 28
29 // ------------------------------------------- 29 // ------------------------------------------------------------
30 // GEANT 4 class implementation file 30 // GEANT 4 class implementation file
31 // 31 //
32 // ---------------- G4FragmentingString - 32 // ---------------- G4FragmentingString ----------------
33 // by Gunter Folger, September 200 33 // by Gunter Folger, September 2001.
34 // class for an excited string used in F 34 // class for an excited string used in Fragmention
35 // ------------------------------------------- 35 // ------------------------------------------------------------
36 36
37 37
38 // G4FragmentingString 38 // G4FragmentingString
39 #include "G4FragmentingString.hh" 39 #include "G4FragmentingString.hh"
40 #include "G4ExcitedString.hh" 40 #include "G4ExcitedString.hh"
41 41
42 //-------------------------------------------- 42 //---------------------------------------------------------------------------------
43 43
44 //-------------------------------------------- 44 //---------------------------------------------------------------------------------
45 45
46 G4FragmentingString::G4FragmentingString(const 46 G4FragmentingString::G4FragmentingString(const G4FragmentingString &old)
47 { 47 {
48 LeftParton=old.LeftParton; 48 LeftParton=old.LeftParton;
49 RightParton=old.RightParton; 49 RightParton=old.RightParton;
50 Ptleft=old.Ptleft; 50 Ptleft=old.Ptleft;
51 Ptright=old.Ptright; 51 Ptright=old.Ptright;
52 Pplus=old.Pplus; 52 Pplus=old.Pplus;
53 Pminus=old.Pminus; 53 Pminus=old.Pminus;
54 theStableParton=old.theStableParton; 54 theStableParton=old.theStableParton;
55 theDecayParton=old.theDecayParton; 55 theDecayParton=old.theDecayParton;
56 decaying=old.decaying; 56 decaying=old.decaying;
57 Pstring=old.Pstring; 57 Pstring=old.Pstring;
58 Pleft =old.Pleft; 58 Pleft =old.Pleft;
59 Pright =old.Pright; 59 Pright =old.Pright;
60 } 60 }
61 61
62 G4FragmentingString & G4FragmentingString::ope 62 G4FragmentingString & G4FragmentingString::operator =(const G4FragmentingString &old)
63 { 63 {
64 if (this != &old) 64 if (this != &old)
65 { 65 {
66 LeftParton=old.LeftParton; 66 LeftParton=old.LeftParton;
67 RightParton=old.RightParton; 67 RightParton=old.RightParton;
68 Ptleft=old.Ptleft; 68 Ptleft=old.Ptleft;
69 Ptright=old.Ptright; 69 Ptright=old.Ptright;
70 Pplus=old.Pplus; 70 Pplus=old.Pplus;
71 Pminus=old.Pminus; 71 Pminus=old.Pminus;
72 theStableParton=old.theStableParton; 72 theStableParton=old.theStableParton;
73 theDecayParton=old.theDecayParton; 73 theDecayParton=old.theDecayParton;
74 decaying=old.decaying; 74 decaying=old.decaying;
75 Pstring=old.Pstring; 75 Pstring=old.Pstring;
76 Pleft =old.Pleft; 76 Pleft =old.Pleft;
77 Pright =old.Pright; 77 Pright =old.Pright;
78 } 78 }
79 return *this; 79 return *this;
80 } 80 }
81 81
82 //-------------------------------------------- 82 //---------------------------------------------------------------------------------
83 83
84 G4FragmentingString::G4FragmentingString(const 84 G4FragmentingString::G4FragmentingString(const G4ExcitedString &excited)
85 { 85 {
86 LeftParton=excited.GetLeftParton()->GetDefin 86 LeftParton=excited.GetLeftParton()->GetDefinition();
87 RightParton=excited.GetRightParton()->GetDef 87 RightParton=excited.GetRightParton()->GetDefinition();
88 Ptleft=excited.GetLeftParton()->Get4Momentum 88 Ptleft=excited.GetLeftParton()->Get4Momentum().vect();
89 Ptleft.setZ(0.); 89 Ptleft.setZ(0.);
90 Ptright=excited.GetRightParton()->Get4Moment 90 Ptright=excited.GetRightParton()->Get4Momentum().vect();
91 Ptright.setZ(0.); 91 Ptright.setZ(0.);
>> 92 G4LorentzVector P=excited.Get4Momentum();
>> 93 Pplus =P.e() + P.pz();
>> 94 Pminus=P.e() - P.pz();
92 theStableParton=0; 95 theStableParton=0;
93 theDecayParton=0; 96 theDecayParton=0;
94 97
95 if (excited.GetDirection() > 0) {decay 98 if (excited.GetDirection() > 0) {decaying=Left; }
96 else {decay 99 else {decaying=Right;}
97 100
98 Pleft = excited.GetLeftParton()->Get4 101 Pleft = excited.GetLeftParton()->Get4Momentum();
99 Pright = excited.GetRightParton()->Get 102 Pright = excited.GetRightParton()->Get4Momentum();
100 Pstring= Pleft + Pright; 103 Pstring= Pleft + Pright;
101 <<
102 Pplus = Pstring.plus(); <<
103 Pminus = Pstring.minus(); <<
104 } 104 }
105 105
106 //-------------------------------------------- 106 //---------------------------------------------------------------------------------
107 107
108 G4FragmentingString::G4FragmentingString(const 108 G4FragmentingString::G4FragmentingString(const G4FragmentingString &old,
109 G4ParticleDefinition * newdecay, 109 G4ParticleDefinition * newdecay,
110 const G4LorentzVector *momentum) 110 const G4LorentzVector *momentum)
111 { 111 {
112 decaying=None; 112 decaying=None;
113 // Momentum of produced hadron <<
114 G4LorentzVector Momentum = G4LorentzVe 113 G4LorentzVector Momentum = G4LorentzVector(momentum->vect(),momentum->e());
115 << 114 // Momentum of produced hadron
116 if ( old.decaying == Left ) << 115 //G4cout<<"Had Mom "<<Momentum<<G4endl;
117 { << 116 //G4cout<<"Str Mom "<<old.Pstring<<G4endl;
118 RightParton= old.RightParton; << 117 Pstring = old.Pstring - Momentum;
119 Ptright = old.Ptright; << 118 //G4cout<<"New Str Mom "<<Pstring<<" "<<Pstring.mag()<<G4endl;
120 Pright = old.Pright; << 119
121 << 120 G4double StringMass = Pstring.mag();
122 LeftParton = newdecay; << 121
123 Ptleft = old.Ptleft - mome << 122 G4LorentzRotation toLAB(Pstring.boostVector());
124 Ptleft.setZ(0.); << 123
125 Pleft = old.Pleft - Momentum; << 124 Pleft = toLAB*G4LorentzVector(0.,0., StringMass/2.,StringMass/2.);
126 << 125 Pright = toLAB*G4LorentzVector(0.,0.,-StringMass/2.,StringMass/2.);
127 Pstring = Pleft + Pright; << 126
128 Pplus = Pstring.plus(); << 127 Ptleft =Pleft.vect(); Ptleft.setZ(0.);
129 Pminus = Pstring.minus(); << 128 Ptright=Pright.vect(); Ptright.setZ(0.);
130 << 129
131 theDecayParton=GetLeftParton() << 130 //G4cout<<"Pleft "<<Pleft<<G4endl;
132 theStableParton=GetRightParton << 131 //G4cout<<"Pright "<<Pright<<G4endl;
133 decaying = Left; << 132 //G4cout<<"Pstring "<<Pstring<<G4endl;
134 } else if ( old.decaying == Right ) << 133 if ( old.decaying == Left )
135 { << 134 {
136 RightParton = newdecay; << 135 RightParton= old.RightParton;
137 Ptright = old.Ptright - mo << 136 // Ptright = old.Ptright;
138 Ptright.setZ(0.); << 137 // Pright = old.Pright;
139 Pright = old.Pright - Momentum << 138
140 << 139 LeftParton = newdecay;
141 LeftParton = old.LeftParton; << 140 // Ptleft = old.Ptleft - momentum->vect();
142 Ptleft = old.Ptleft; << 141 // Ptleft.setZ(0.);
143 Pleft = old.Pleft; << 142 // Pleft = old.Pleft - Momentum;
144 << 143 // Pstring=Pleft + Pright;
145 Pstring = Pleft + Pright; << 144
146 Pplus = Pstring.plus(); << 145 theDecayParton=GetLeftParton();
147 Pminus = Pstring.minus(); << 146 theStableParton=GetRightParton();
148 << 147 decaying=Left;
149 theDecayParton=GetRightParton( << 148 } else if ( old.decaying == Right )
150 theStableParton=GetLeftParton( << 149 {
151 decaying = Right; << 150 RightParton = newdecay;
152 } else << 151 // Ptright = old.Ptright - momentum->vect();
>> 152 // Ptright.setZ(0.);
>> 153 // Pright = old.Pright + Momentum;
>> 154
>> 155 LeftParton = old.LeftParton;
>> 156 // Ptleft = old.Ptleft;
>> 157 // Pleft = old.Pleft;
>> 158 // Pstring=Pleft + Pright;
>> 159
>> 160 theDecayParton=GetRightParton();
>> 161 theStableParton=GetLeftParton();
>> 162 decaying=Right;
>> 163 } else
153 { 164 {
154 throw G4HadronicException(__FILE__, __LINE 165 throw G4HadronicException(__FILE__, __LINE__,
155 "G4FragmentingString::G4Frag 166 "G4FragmentingString::G4FragmentingString: no decay Direction defined");
156 } 167 }
>> 168 Pplus = Pstring.plus(); //old.Pplus - (momentum->e() + momentum->pz());
>> 169 Pminus = Pstring.minus(); //old.Pminus - (momentum->e() - momentum->pz());
157 } 170 }
158 171
159 172
160 //-------------------------------------------- 173 //---------------------------------------------------------------------------------
161 174
162 G4FragmentingString::G4FragmentingString(const 175 G4FragmentingString::G4FragmentingString(const G4FragmentingString &old,
163 G4ParticleDefinition * newdecay) 176 G4ParticleDefinition * newdecay)
164 { 177 {
165 decaying=None; 178 decaying=None;
166 179
167 Ptleft.setX(0.); Ptleft.setY(0.); Pt 180 Ptleft.setX(0.); Ptleft.setY(0.); Ptleft.setZ(0.);
168 Ptright.setX(0.); Ptright.setY(0.); Pt 181 Ptright.setX(0.); Ptright.setY(0.); Ptright.setZ(0.);
169 Pplus=0.; Pminus=0.; 182 Pplus=0.; Pminus=0.;
170 theStableParton=0; theDecayParton=0; 183 theStableParton=0; theDecayParton=0;
171 184
172 Pstring=G4LorentzVector(0.,0.,0.,0.); 185 Pstring=G4LorentzVector(0.,0.,0.,0.);
173 Pleft =G4LorentzVector(0.,0.,0.,0.); 186 Pleft =G4LorentzVector(0.,0.,0.,0.);
174 Pright =G4LorentzVector(0.,0.,0.,0.); 187 Pright =G4LorentzVector(0.,0.,0.,0.);
175 188
176 if ( old.decaying == Left ) 189 if ( old.decaying == Left )
177 { 190 {
178 RightParton= old.RightParton; 191 RightParton= old.RightParton;
179 LeftParton = newdecay; 192 LeftParton = newdecay;
180 decaying=Left; 193 decaying=Left;
181 } else if ( old.decaying == Right ) 194 } else if ( old.decaying == Right )
182 { 195 {
183 RightParton = newdecay; 196 RightParton = newdecay;
184 LeftParton = old.LeftParton; 197 LeftParton = old.LeftParton;
185 decaying=Right; 198 decaying=Right;
186 } else 199 } else
187 { 200 {
188 throw G4HadronicException(__FILE__, __LINE 201 throw G4HadronicException(__FILE__, __LINE__,
189 "G4FragmentingString::G4Frag 202 "G4FragmentingString::G4FragmentingString: no decay Direction defined");
190 } 203 }
191 } 204 }
192 205
193 206
194 //-------------------------------------------- 207 //---------------------------------------------------------------------------------
195 208
196 G4FragmentingString::~G4FragmentingString() 209 G4FragmentingString::~G4FragmentingString()
197 {} 210 {}
198 211
>> 212
199 //-------------------------------------------- 213 //---------------------------------------------------------------------------------
200 214
201 void G4FragmentingString::SetLeftPartonStable( 215 void G4FragmentingString::SetLeftPartonStable()
202 { 216 {
203 theStableParton=GetLeftParton(); 217 theStableParton=GetLeftParton();
204 theDecayParton=GetRightParton(); 218 theDecayParton=GetRightParton();
205 decaying=Right; 219 decaying=Right;
206 } 220 }
207 221
208 //-------------------------------------------- 222 //---------------------------------------------------------------------------------
209 223
210 void G4FragmentingString::SetRightPartonStable 224 void G4FragmentingString::SetRightPartonStable()
211 { 225 {
212 theStableParton=GetRightParton(); 226 theStableParton=GetRightParton();
213 theDecayParton=GetLeftParton(); 227 theDecayParton=GetLeftParton();
214 decaying=Left; 228 decaying=Left;
215 } 229 }
216 230
217 //-------------------------------------------- 231 //---------------------------------------------------------------------------------
218 232
219 G4int G4FragmentingString::GetDecayDirection() 233 G4int G4FragmentingString::GetDecayDirection() const
220 { 234 {
221 if (decaying == Left ) return +1; 235 if (decaying == Left ) return +1;
222 else if (decaying == Right) return -1; 236 else if (decaying == Right) return -1;
223 else throw G4HadronicException(__FILE__, __L 237 else throw G4HadronicException(__FILE__, __LINE__,
224 "G4FragmentingString::GetDecayD 238 "G4FragmentingString::GetDecayDirection: decay side UNdefined!");
225 return 0; 239 return 0;
226 } 240 }
227 241
228 //-------------------------------------------- 242 //---------------------------------------------------------------------------------
229 243
230 G4bool G4FragmentingString::IsAFourQuarkString 244 G4bool G4FragmentingString::IsAFourQuarkString() const
231 { 245 {
232 return LeftParton->GetParticleSubType()== 246 return LeftParton->GetParticleSubType()== "di_quark"
233 && RightParton->GetParticleSubType()== 247 && RightParton->GetParticleSubType()== "di_quark";
234 } 248 }
235 249
236 //-------------------------------------------- 250 //---------------------------------------------------------------------------------
237 251
238 G4bool G4FragmentingString::DecayIsQuark() 252 G4bool G4FragmentingString::DecayIsQuark()
239 { 253 {
240 return theDecayParton->GetParticleSubType()= 254 return theDecayParton->GetParticleSubType()== "quark";
241 } 255 }
242 256
243 G4bool G4FragmentingString::StableIsQuark() 257 G4bool G4FragmentingString::StableIsQuark()
244 { 258 {
245 return theStableParton->GetParticleSubType() 259 return theStableParton->GetParticleSubType()== "quark";
246 } 260 }
247 261
248 //-------------------------------------------- 262 //---------------------------------------------------------------------------------
249 263
250 G4ThreeVector G4FragmentingString::StablePt() 264 G4ThreeVector G4FragmentingString::StablePt()
251 { 265 {
252 if (decaying == Left ) return Ptright; 266 if (decaying == Left ) return Ptright;
253 else if (decaying == Right ) return Ptleft; 267 else if (decaying == Right ) return Ptleft;
254 else throw G4HadronicException(__FILE__, __L 268 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
255 return G4ThreeVector(); 269 return G4ThreeVector();
256 } 270 }
257 271
258 G4ThreeVector G4FragmentingString::DecayPt() 272 G4ThreeVector G4FragmentingString::DecayPt()
259 { 273 {
260 if (decaying == Left ) return Ptleft; 274 if (decaying == Left ) return Ptleft;
261 else if (decaying == Right ) return Ptright; 275 else if (decaying == Right ) return Ptright;
262 else throw G4HadronicException(__FILE__, __L 276 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
263 return G4ThreeVector(); 277 return G4ThreeVector();
264 } 278 }
265 279
266 //-------------------------------------------- 280 //---------------------------------------------------------------------------------
267 281
268 G4double G4FragmentingString::LightConePlus() 282 G4double G4FragmentingString::LightConePlus()
269 { 283 {
270 return Pplus; 284 return Pplus;
271 } 285 }
272 286
273 G4double G4FragmentingString::LightConeMinus() 287 G4double G4FragmentingString::LightConeMinus()
274 { 288 {
275 return Pminus; 289 return Pminus;
276 } 290 }
277 291
278 G4double G4FragmentingString::LightConeDecay() 292 G4double G4FragmentingString::LightConeDecay()
279 { 293 {
280 if (decaying == Left ) return Pplus; 294 if (decaying == Left ) return Pplus;
281 else if (decaying == Right ) return Pminus; 295 else if (decaying == Right ) return Pminus;
282 else throw G4HadronicException(__FILE__, __L 296 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
283 } 297 }
284 298
285 //-------------------------------------------- 299 //---------------------------------------------------------------------------------
286 300
287 G4LorentzVector G4FragmentingString::Get4Momen 301 G4LorentzVector G4FragmentingString::Get4Momentum() const
288 { 302 {
289 return Pstring; << 303 G4LorentzVector momentum(Ptleft+Ptright,0);
>> 304 momentum.setPz(0.5*(Pplus-Pminus));
>> 305 momentum.setE(0.5*(Pplus+Pminus));
>> 306 return momentum;
290 } 307 }
291 308
292 G4double G4FragmentingString::Mass2() const 309 G4double G4FragmentingString::Mass2() const
293 { 310 {
>> 311 // return Pplus*Pminus - (Ptleft+Ptright).mag2();
294 return Pstring.mag2(); 312 return Pstring.mag2();
295 } 313 }
296 314
297 G4double G4FragmentingString::Mass() const 315 G4double G4FragmentingString::Mass() const
298 { 316 {
>> 317 // return std::sqrt(this->Mass2());
299 return Pstring.mag(); 318 return Pstring.mag();
300 } 319 }
301 320
302 G4double G4FragmentingString::MassT2() const 321 G4double G4FragmentingString::MassT2() const
303 { 322 {
304 return Pplus*Pminus; 323 return Pplus*Pminus;
305 } 324 }
306 325
307 G4LorentzVector G4FragmentingString::GetPstrin 326 G4LorentzVector G4FragmentingString::GetPstring()
308 { 327 {
309 return Pstring; 328 return Pstring;
310 } 329 }
311 330
312 G4LorentzVector G4FragmentingString::GetPleft( 331 G4LorentzVector G4FragmentingString::GetPleft()
313 { 332 {
314 return Pleft; 333 return Pleft;
315 } 334 }
316 335
317 G4LorentzVector G4FragmentingString::GetPright 336 G4LorentzVector G4FragmentingString::GetPright()
318 { 337 {
319 return Pright; 338 return Pright;
320 } 339 }
321 340
322 G4LorentzRotation G4FragmentingString::Transfo <<
323 { <<
324 G4LorentzVector momentum = Pstring; <<
325 G4LorentzRotation toAlignedCms(-1*momentu <<
326 momentum = toAlignedCms * Pleft; <<
327 <<
328 toAlignedCms.rotateZ(-1*momentum.phi()); <<
329 toAlignedCms.rotateY(-1*momentum.theta()) <<
330 <<
331 Pleft *= toAlignedCms; <<
332 Pright *= toAlignedCms; <<
333 Pstring *= toAlignedCms; <<
334 <<
335 Ptleft = G4ThreeVector(Pleft.vect()); <<
336 Ptleft.setZ(0.); <<
337 Ptright = G4ThreeVector(Pright.vect()); <<
338 Pplus = Pstring.plus(); <<
339 Pminus = Pstring.minus(); <<
340 <<
341 return toAlignedCms; <<
342 } <<
343 341