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27 27
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; <<
55 theDecayParton=old.theDecayParton; <<
56 decaying=old.decaying; 54 decaying=old.decaying;
57 Pstring=old.Pstring; <<
58 Pleft =old.Pleft; <<
59 Pright =old.Pright; <<
60 } <<
61 <<
62 G4FragmentingString & G4FragmentingString::ope <<
63 { <<
64 if (this != &old) <<
65 { <<
66 LeftParton=old.LeftParton; <<
67 RightParton=old.RightParton; <<
68 Ptleft=old.Ptleft; <<
69 Ptright=old.Ptright; <<
70 Pplus=old.Pplus; <<
71 Pminus=old.Pminus; <<
72 theStableParton=old.theStableParton; <<
73 theDecayParton=old.theDecayParton; <<
74 decaying=old.decaying; <<
75 Pstring=old.Pstring; <<
76 Pleft =old.Pleft; <<
77 Pright =old.Pright; <<
78 } <<
79 return *this; <<
80 } 55 }
81 56
82 //-------------------------------------------- 57 //---------------------------------------------------------------------------------
83 58
84 G4FragmentingString::G4FragmentingString(const 59 G4FragmentingString::G4FragmentingString(const G4ExcitedString &excited)
85 { 60 {
86 LeftParton=excited.GetLeftParton()->GetDefin 61 LeftParton=excited.GetLeftParton()->GetDefinition();
87 RightParton=excited.GetRightParton()->GetDef 62 RightParton=excited.GetRightParton()->GetDefinition();
88 Ptleft=excited.GetLeftParton()->Get4Momentum 63 Ptleft=excited.GetLeftParton()->Get4Momentum().vect();
89 Ptleft.setZ(0.); 64 Ptleft.setZ(0.);
90 Ptright=excited.GetRightParton()->Get4Moment 65 Ptright=excited.GetRightParton()->Get4Momentum().vect();
91 Ptright.setZ(0.); 66 Ptright.setZ(0.);
92 theStableParton=0; << 67 G4LorentzVector P=excited.Get4Momentum();
93 theDecayParton=0; << 68 Pplus =P.e() + P.pz();
94 << 69 Pminus=P.e() - P.pz();
95 if (excited.GetDirection() > 0) {decay << 70 decaying=None;
96 else {decay <<
97 <<
98 Pleft = excited.GetLeftParton()->Get4 <<
99 Pright = excited.GetRightParton()->Get <<
100 Pstring= Pleft + Pright; <<
101 <<
102 Pplus = Pstring.plus(); <<
103 Pminus = Pstring.minus(); <<
104 } 71 }
105 72
106 //-------------------------------------------- 73 //---------------------------------------------------------------------------------
107 74
108 G4FragmentingString::G4FragmentingString(const 75 G4FragmentingString::G4FragmentingString(const G4FragmentingString &old,
109 G4ParticleDefinition * newdecay, 76 G4ParticleDefinition * newdecay,
110 const G4LorentzVector *momentum) 77 const G4LorentzVector *momentum)
111 { 78 {
112 decaying=None; 79 decaying=None;
113 // Momentum of produced hadron << 80 if ( old.decaying == Left )
114 G4LorentzVector Momentum = G4LorentzVe << 81 {
115 << 82 //G4cout<<" Left "<<G4endl;
116 if ( old.decaying == Left ) << 83 //G4cout<<"Pt right "<<Ptright<<G4endl;
117 { << 84 //G4cout<<"Pt left "<<Ptleft <<G4endl;
118 RightParton= old.RightParton; << 85 RightParton= old.RightParton;
119 Ptright = old.Ptright; << 86 Ptright = old.Ptright;
120 Pright = old.Pright; << 87 LeftParton = newdecay;
121 << 88 Ptleft = old.Ptleft - momentum->vect();
122 LeftParton = newdecay; << 89 Ptleft.setZ(0.);
123 Ptleft = old.Ptleft - mome << 90 //G4cout<<"Pt right "<<Ptright<<G4endl;
124 Ptleft.setZ(0.); << 91 //G4cout<<"Pt left "<<Ptleft <<G4endl;
125 Pleft = old.Pleft - Momentum; << 92 } else if ( old.decaying == Right )
126 << 93 {
127 Pstring = Pleft + Pright; << 94 //G4cout<<" Right "<<G4endl;
128 Pplus = Pstring.plus(); << 95 //G4cout<<"Pt right "<<Ptright<<G4endl;
129 Pminus = Pstring.minus(); << 96 //G4cout<<"Pt left "<<Ptleft <<G4endl;
130 << 97 RightParton = newdecay;
131 theDecayParton=GetLeftParton() << 98 Ptright = old.Ptright - momentum->vect();
132 theStableParton=GetRightParton << 99 Ptright.setZ(0.);
133 decaying = Left; << 100 LeftParton = old.LeftParton;
134 } else if ( old.decaying == Right ) << 101 Ptleft = old.Ptleft;
135 { << 102 //G4cout<<"Pt right "<<Ptright<<G4endl;
136 RightParton = newdecay; << 103 //G4cout<<"Pt left "<<Ptleft <<G4endl;
137 Ptright = old.Ptright - mo << 104 } else
138 Ptright.setZ(0.); <<
139 Pright = old.Pright - Momentum <<
140 <<
141 LeftParton = old.LeftParton; <<
142 Ptleft = old.Ptleft; <<
143 Pleft = old.Pleft; <<
144 <<
145 Pstring = Pleft + Pright; <<
146 Pplus = Pstring.plus(); <<
147 Pminus = Pstring.minus(); <<
148 <<
149 theDecayParton=GetRightParton( <<
150 theStableParton=GetLeftParton( <<
151 decaying = Right; <<
152 } else <<
153 { 105 {
154 throw G4HadronicException(__FILE__, __LINE << 106 throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::G4FragmentingString: no decay Direction defined");
155 "G4FragmentingString::G4Frag <<
156 } 107 }
>> 108 Pplus = old.Pplus - (momentum->e() + momentum->pz());
>> 109 Pminus = old.Pminus - (momentum->e() - momentum->pz());
>> 110
>> 111 //G4double Eold=0.5 * (old.Pplus + old.Pminus);
>> 112 //G4double Enew=0.5 * (Pplus + Pminus);
157 } 113 }
158 114
159 115
160 //-------------------------------------------- 116 //---------------------------------------------------------------------------------
161 117
162 G4FragmentingString::G4FragmentingString(const << 118 G4FragmentingString::G4FragmentingString(const G4FragmentingString &old, // Uzhi
163 G4ParticleDefinition * newdecay) << 119 G4ParticleDefinition * newdecay) // Uzhi
164 { << 120 { // Uzhi
165 decaying=None; << 121 decaying=None; // Uzhi
166 << 122 if ( old.decaying == Left ) // Uzhi
167 Ptleft.setX(0.); Ptleft.setY(0.); Pt << 123 { // Uzhi
168 Ptright.setX(0.); Ptright.setY(0.); Pt << 124 RightParton= old.RightParton; // Uzhi
169 Pplus=0.; Pminus=0.; << 125 LeftParton = newdecay; // Uzhi
170 theStableParton=0; theDecayParton=0; << 126 } else if ( old.decaying == Right ) // Uzhi
171 << 127 { // Uzhi
172 Pstring=G4LorentzVector(0.,0.,0.,0.); << 128 RightParton = newdecay; // Uzhi
173 Pleft =G4LorentzVector(0.,0.,0.,0.); << 129 LeftParton = old.LeftParton; // Uzhi
174 Pright =G4LorentzVector(0.,0.,0.,0.); << 130 } else // Uzhi
175 <<
176 if ( old.decaying == Left ) <<
177 { <<
178 RightParton= old.RightParton; <<
179 LeftParton = newdecay; <<
180 decaying=Left; <<
181 } else if ( old.decaying == Right ) <<
182 { <<
183 RightParton = newdecay; <<
184 LeftParton = old.LeftParton; <<
185 decaying=Right; <<
186 } else <<
187 { 131 {
188 throw G4HadronicException(__FILE__, __LINE << 132 throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::G4FragmentingString: no decay Direction defined");
189 "G4FragmentingString::G4Frag <<
190 } 133 }
191 } 134 }
192 135
193 136
194 //-------------------------------------------- 137 //---------------------------------------------------------------------------------
195 138
196 G4FragmentingString::~G4FragmentingString() 139 G4FragmentingString::~G4FragmentingString()
197 {} 140 {}
198 141
>> 142
199 //-------------------------------------------- 143 //---------------------------------------------------------------------------------
200 144
201 void G4FragmentingString::SetLeftPartonStable( 145 void G4FragmentingString::SetLeftPartonStable()
202 { 146 {
203 theStableParton=GetLeftParton(); 147 theStableParton=GetLeftParton();
204 theDecayParton=GetRightParton(); 148 theDecayParton=GetRightParton();
205 decaying=Right; 149 decaying=Right;
206 } 150 }
207 151
208 //-------------------------------------------- 152 //---------------------------------------------------------------------------------
209 153
210 void G4FragmentingString::SetRightPartonStable 154 void G4FragmentingString::SetRightPartonStable()
211 { 155 {
212 theStableParton=GetRightParton(); 156 theStableParton=GetRightParton();
213 theDecayParton=GetLeftParton(); 157 theDecayParton=GetLeftParton();
214 decaying=Left; 158 decaying=Left;
215 } 159 }
216 160
217 //-------------------------------------------- 161 //---------------------------------------------------------------------------------
218 162
219 G4int G4FragmentingString::GetDecayDirection() 163 G4int G4FragmentingString::GetDecayDirection() const
220 { 164 {
221 if (decaying == Left ) return +1; 165 if (decaying == Left ) return +1;
222 else if (decaying == Right) return -1; 166 else if (decaying == Right) return -1;
223 else throw G4HadronicException(__FILE__, __L << 167 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::GetDecayDirection: decay side UNdefined!");
224 "G4FragmentingString::GetDecayD <<
225 return 0; 168 return 0;
226 } 169 }
227 170
228 //-------------------------------------------- 171 //---------------------------------------------------------------------------------
229 172
230 G4bool G4FragmentingString::IsAFourQuarkString << 173 G4bool G4FragmentingString::FourQuarkString() const
231 { 174 {
232 return LeftParton->GetParticleSubType()== 175 return LeftParton->GetParticleSubType()== "di_quark"
233 && RightParton->GetParticleSubType()== 176 && RightParton->GetParticleSubType()== "di_quark";
234 } 177 }
235 178
236 //-------------------------------------------- 179 //---------------------------------------------------------------------------------
237 180
238 G4bool G4FragmentingString::DecayIsQuark() 181 G4bool G4FragmentingString::DecayIsQuark()
239 { 182 {
240 return theDecayParton->GetParticleSubType()= 183 return theDecayParton->GetParticleSubType()== "quark";
241 } 184 }
242 185
243 G4bool G4FragmentingString::StableIsQuark() 186 G4bool G4FragmentingString::StableIsQuark()
244 { 187 {
245 return theStableParton->GetParticleSubType() 188 return theStableParton->GetParticleSubType()== "quark";
246 } 189 }
247 190
248 //-------------------------------------------- 191 //---------------------------------------------------------------------------------
249 192
250 G4ThreeVector G4FragmentingString::StablePt() 193 G4ThreeVector G4FragmentingString::StablePt()
251 { 194 {
252 if (decaying == Left ) return Ptright; 195 if (decaying == Left ) return Ptright;
253 else if (decaying == Right ) return Ptleft; 196 else if (decaying == Right ) return Ptleft;
254 else throw G4HadronicException(__FILE__, __L 197 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
255 return G4ThreeVector(); 198 return G4ThreeVector();
256 } 199 }
257 200
258 G4ThreeVector G4FragmentingString::DecayPt() 201 G4ThreeVector G4FragmentingString::DecayPt()
259 { 202 {
260 if (decaying == Left ) return Ptleft; 203 if (decaying == Left ) return Ptleft;
261 else if (decaying == Right ) return Ptright; 204 else if (decaying == Right ) return Ptright;
262 else throw G4HadronicException(__FILE__, __L 205 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
263 return G4ThreeVector(); 206 return G4ThreeVector();
264 } 207 }
265 208
266 //-------------------------------------------- 209 //---------------------------------------------------------------------------------
267 210
268 G4double G4FragmentingString::LightConePlus() 211 G4double G4FragmentingString::LightConePlus()
269 { 212 {
270 return Pplus; 213 return Pplus;
271 } 214 }
272 215
273 G4double G4FragmentingString::LightConeMinus() 216 G4double G4FragmentingString::LightConeMinus()
274 { 217 {
275 return Pminus; 218 return Pminus;
276 } 219 }
277 220
278 G4double G4FragmentingString::LightConeDecay() 221 G4double G4FragmentingString::LightConeDecay()
279 { 222 {
280 if (decaying == Left ) return Pplus; 223 if (decaying == Left ) return Pplus;
281 else if (decaying == Right ) return Pminus; 224 else if (decaying == Right ) return Pminus;
282 else throw G4HadronicException(__FILE__, __L 225 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
>> 226 return 0;
283 } 227 }
284 228
285 //-------------------------------------------- 229 //---------------------------------------------------------------------------------
286 230
287 G4LorentzVector G4FragmentingString::Get4Momen 231 G4LorentzVector G4FragmentingString::Get4Momentum() const
288 { 232 {
289 return Pstring; << 233 G4LorentzVector momentum(Ptleft+Ptright,0);
>> 234 momentum.setPz(0.5*(Pplus-Pminus));
>> 235 momentum.setE(0.5*(Pplus+Pminus));
>> 236 return momentum;
290 } 237 }
291 238
292 G4double G4FragmentingString::Mass2() const 239 G4double G4FragmentingString::Mass2() const
293 { 240 {
294 return Pstring.mag2(); << 241 return Pplus*Pminus - (Ptleft+Ptright).mag2();
295 } 242 }
296 243
297 G4double G4FragmentingString::Mass() const 244 G4double G4FragmentingString::Mass() const
298 { 245 {
299 return Pstring.mag(); << 246 return std::sqrt(this->Mass2());
300 } 247 }
301 248
302 G4double G4FragmentingString::MassT2() const 249 G4double G4FragmentingString::MassT2() const
303 { 250 {
304 return Pplus*Pminus; << 251 return Pplus*Pminus;
305 } <<
306 <<
307 G4LorentzVector G4FragmentingString::GetPstrin <<
308 { <<
309 return Pstring; <<
310 } <<
311 <<
312 G4LorentzVector G4FragmentingString::GetPleft( <<
313 { <<
314 return Pleft; <<
315 } <<
316 <<
317 G4LorentzVector G4FragmentingString::GetPright <<
318 { <<
319 return Pright; <<
320 } <<
321 <<
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 } 252 }
343 253