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25 // 25 //
26 // 26 //
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; 54 theStableParton=old.theStableParton;
55 theDecayParton=old.theDecayParton; 55 theDecayParton=old.theDecayParton;
56 decaying=old.decaying; 56 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 } 57 }
81 58
82 //-------------------------------------------- 59 //---------------------------------------------------------------------------------
83 60
84 G4FragmentingString::G4FragmentingString(const 61 G4FragmentingString::G4FragmentingString(const G4ExcitedString &excited)
85 { 62 {
86 LeftParton=excited.GetLeftParton()->GetDefin 63 LeftParton=excited.GetLeftParton()->GetDefinition();
87 RightParton=excited.GetRightParton()->GetDef 64 RightParton=excited.GetRightParton()->GetDefinition();
88 Ptleft=excited.GetLeftParton()->Get4Momentum 65 Ptleft=excited.GetLeftParton()->Get4Momentum().vect();
89 Ptleft.setZ(0.); 66 Ptleft.setZ(0.);
90 Ptright=excited.GetRightParton()->Get4Moment 67 Ptright=excited.GetRightParton()->Get4Momentum().vect();
91 Ptright.setZ(0.); 68 Ptright.setZ(0.);
>> 69 G4LorentzVector P=excited.Get4Momentum();
>> 70 Pplus =P.e() + P.pz();
>> 71 Pminus=P.e() - P.pz();
92 theStableParton=0; 72 theStableParton=0;
93 theDecayParton=0; 73 theDecayParton=0;
94 << 74 decaying=None;
95 if (excited.GetDirection() > 0) {decay <<
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 } 75 }
105 76
106 //-------------------------------------------- 77 //---------------------------------------------------------------------------------
107 78
108 G4FragmentingString::G4FragmentingString(const 79 G4FragmentingString::G4FragmentingString(const G4FragmentingString &old,
109 G4ParticleDefinition * newdecay, 80 G4ParticleDefinition * newdecay,
110 const G4LorentzVector *momentum) 81 const G4LorentzVector *momentum)
111 { 82 {
112 decaying=None; 83 decaying=None;
113 // Momentum of produced hadron << 84 if ( old.decaying == Left )
114 G4LorentzVector Momentum = G4LorentzVe << 85 {
115 << 86 RightParton= old.RightParton;
116 if ( old.decaying == Left ) << 87 Ptright = old.Ptright;
117 { << 88 LeftParton = newdecay;
118 RightParton= old.RightParton; << 89 Ptleft = old.Ptleft - momentum->vect();
119 Ptright = old.Ptright; << 90 Ptleft.setZ(0.);
120 Pright = old.Pright; << 91 theDecayParton=GetLeftParton();
121 << 92 theStableParton=GetRightParton();
122 LeftParton = newdecay; << 93 } else if ( old.decaying == Right )
123 Ptleft = old.Ptleft - mome << 94 {
124 Ptleft.setZ(0.); << 95 RightParton = newdecay;
125 Pleft = old.Pleft - Momentum; << 96 Ptright = old.Ptright - momentum->vect();
126 << 97 Ptright.setZ(0.);
127 Pstring = Pleft + Pright; << 98 LeftParton = old.LeftParton;
128 Pplus = Pstring.plus(); << 99 Ptleft = old.Ptleft;
129 Pminus = Pstring.minus(); << 100 theDecayParton=GetRightParton();
130 << 101 theStableParton=GetLeftParton();
131 theDecayParton=GetLeftParton() << 102 } else
132 theStableParton=GetRightParton <<
133 decaying = Left; <<
134 } else if ( old.decaying == Right ) <<
135 { <<
136 RightParton = newdecay; <<
137 Ptright = old.Ptright - mo <<
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 { 103 {
154 throw G4HadronicException(__FILE__, __LINE << 104 throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::G4FragmentingString: no decay Direction defined");
155 "G4FragmentingString::G4Frag <<
156 } 105 }
>> 106 Pplus = old.Pplus - (momentum->e() + momentum->pz());
>> 107 Pminus = old.Pminus - (momentum->e() - momentum->pz());
>> 108
>> 109 //G4double Eold=0.5 * (old.Pplus + old.Pminus);
>> 110 //G4double Enew=0.5 * (Pplus + Pminus);
157 } 111 }
158 112
159 113
160 //-------------------------------------------- 114 //---------------------------------------------------------------------------------
161 115
162 G4FragmentingString::G4FragmentingString(const 116 G4FragmentingString::G4FragmentingString(const G4FragmentingString &old,
163 G4ParticleDefinition * newdecay) 117 G4ParticleDefinition * newdecay)
164 { 118 {
165 decaying=None; 119 decaying=None;
166 120
167 Ptleft.setX(0.); Ptleft.setY(0.); Pt << 121 Ptleft.setX(0.); Ptleft.setY(0.); Ptleft.setZ(0.); // Uzhi 25.02.2011
168 Ptright.setX(0.); Ptright.setY(0.); Pt << 122 Ptright.setX(0.); Ptright.setY(0.); Ptright.setZ(0.); // Uzhi 25.02.2011
169 Pplus=0.; Pminus=0.; << 123 Pplus=0.; Pminus=0.; // Uzhi 25.02.2011
170 theStableParton=0; theDecayParton=0; << 124 theStableParton=0; theDecayParton=0; // Uzhi 25.02.2011
171 <<
172 Pstring=G4LorentzVector(0.,0.,0.,0.); <<
173 Pleft =G4LorentzVector(0.,0.,0.,0.); <<
174 Pright =G4LorentzVector(0.,0.,0.,0.); <<
175 125
176 if ( old.decaying == Left ) 126 if ( old.decaying == Left )
177 { 127 {
178 RightParton= old.RightParton; 128 RightParton= old.RightParton;
179 LeftParton = newdecay; 129 LeftParton = newdecay;
180 decaying=Left; <<
181 } else if ( old.decaying == Right ) 130 } else if ( old.decaying == Right )
182 { 131 {
183 RightParton = newdecay; 132 RightParton = newdecay;
184 LeftParton = old.LeftParton; 133 LeftParton = old.LeftParton;
185 decaying=Right; <<
186 } else 134 } else
187 { 135 {
188 throw G4HadronicException(__FILE__, __LINE << 136 throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::G4FragmentingString: no decay Direction defined");
189 "G4FragmentingString::G4Frag <<
190 } 137 }
191 } 138 }
192 139
193 140
194 //-------------------------------------------- 141 //---------------------------------------------------------------------------------
195 142
196 G4FragmentingString::~G4FragmentingString() 143 G4FragmentingString::~G4FragmentingString()
197 {} 144 {}
198 145
>> 146
199 //-------------------------------------------- 147 //---------------------------------------------------------------------------------
200 148
201 void G4FragmentingString::SetLeftPartonStable( 149 void G4FragmentingString::SetLeftPartonStable()
202 { 150 {
203 theStableParton=GetLeftParton(); 151 theStableParton=GetLeftParton();
204 theDecayParton=GetRightParton(); 152 theDecayParton=GetRightParton();
205 decaying=Right; 153 decaying=Right;
206 } 154 }
207 155
208 //-------------------------------------------- 156 //---------------------------------------------------------------------------------
209 157
210 void G4FragmentingString::SetRightPartonStable 158 void G4FragmentingString::SetRightPartonStable()
211 { 159 {
212 theStableParton=GetRightParton(); 160 theStableParton=GetRightParton();
213 theDecayParton=GetLeftParton(); 161 theDecayParton=GetLeftParton();
214 decaying=Left; 162 decaying=Left;
215 } 163 }
216 164
217 //-------------------------------------------- 165 //---------------------------------------------------------------------------------
218 166
219 G4int G4FragmentingString::GetDecayDirection() 167 G4int G4FragmentingString::GetDecayDirection() const
220 { 168 {
221 if (decaying == Left ) return +1; 169 if (decaying == Left ) return +1;
222 else if (decaying == Right) return -1; 170 else if (decaying == Right) return -1;
223 else throw G4HadronicException(__FILE__, __L << 171 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::GetDecayDirection: decay side UNdefined!");
224 "G4FragmentingString::GetDecayD <<
225 return 0; 172 return 0;
226 } 173 }
227 174
228 //-------------------------------------------- 175 //---------------------------------------------------------------------------------
229 176
230 G4bool G4FragmentingString::IsAFourQuarkString << 177 G4bool G4FragmentingString::FourQuarkString() const
231 { 178 {
232 return LeftParton->GetParticleSubType()== 179 return LeftParton->GetParticleSubType()== "di_quark"
233 && RightParton->GetParticleSubType()== 180 && RightParton->GetParticleSubType()== "di_quark";
234 } 181 }
235 182
236 //-------------------------------------------- 183 //---------------------------------------------------------------------------------
237 184
238 G4bool G4FragmentingString::DecayIsQuark() 185 G4bool G4FragmentingString::DecayIsQuark()
239 { 186 {
240 return theDecayParton->GetParticleSubType()= 187 return theDecayParton->GetParticleSubType()== "quark";
241 } 188 }
242 189
243 G4bool G4FragmentingString::StableIsQuark() 190 G4bool G4FragmentingString::StableIsQuark()
244 { 191 {
245 return theStableParton->GetParticleSubType() 192 return theStableParton->GetParticleSubType()== "quark";
246 } 193 }
247 194
248 //-------------------------------------------- 195 //---------------------------------------------------------------------------------
249 196
250 G4ThreeVector G4FragmentingString::StablePt() 197 G4ThreeVector G4FragmentingString::StablePt()
251 { 198 {
252 if (decaying == Left ) return Ptright; 199 if (decaying == Left ) return Ptright;
253 else if (decaying == Right ) return Ptleft; 200 else if (decaying == Right ) return Ptleft;
254 else throw G4HadronicException(__FILE__, __L 201 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
255 return G4ThreeVector(); 202 return G4ThreeVector();
256 } 203 }
257 204
258 G4ThreeVector G4FragmentingString::DecayPt() 205 G4ThreeVector G4FragmentingString::DecayPt()
259 { 206 {
260 if (decaying == Left ) return Ptleft; 207 if (decaying == Left ) return Ptleft;
261 else if (decaying == Right ) return Ptright; 208 else if (decaying == Right ) return Ptright;
262 else throw G4HadronicException(__FILE__, __L 209 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
263 return G4ThreeVector(); 210 return G4ThreeVector();
264 } 211 }
265 212
266 //-------------------------------------------- 213 //---------------------------------------------------------------------------------
267 214
268 G4double G4FragmentingString::LightConePlus() 215 G4double G4FragmentingString::LightConePlus()
269 { 216 {
270 return Pplus; 217 return Pplus;
271 } 218 }
272 219
273 G4double G4FragmentingString::LightConeMinus() 220 G4double G4FragmentingString::LightConeMinus()
274 { 221 {
275 return Pminus; 222 return Pminus;
276 } 223 }
277 224
278 G4double G4FragmentingString::LightConeDecay() 225 G4double G4FragmentingString::LightConeDecay()
279 { 226 {
280 if (decaying == Left ) return Pplus; 227 if (decaying == Left ) return Pplus;
281 else if (decaying == Right ) return Pminus; 228 else if (decaying == Right ) return Pminus;
282 else throw G4HadronicException(__FILE__, __L 229 else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!");
>> 230 return 0;
283 } 231 }
284 232
285 //-------------------------------------------- 233 //---------------------------------------------------------------------------------
286 234
287 G4LorentzVector G4FragmentingString::Get4Momen 235 G4LorentzVector G4FragmentingString::Get4Momentum() const
288 { 236 {
289 return Pstring; << 237 G4LorentzVector momentum(Ptleft+Ptright,0);
>> 238 momentum.setPz(0.5*(Pplus-Pminus));
>> 239 momentum.setE(0.5*(Pplus+Pminus));
>> 240 return momentum;
290 } 241 }
291 242
292 G4double G4FragmentingString::Mass2() const 243 G4double G4FragmentingString::Mass2() const
293 { 244 {
294 return Pstring.mag2(); << 245 return Pplus*Pminus - (Ptleft+Ptright).mag2();
295 } 246 }
296 247
297 G4double G4FragmentingString::Mass() const 248 G4double G4FragmentingString::Mass() const
298 { 249 {
299 return Pstring.mag(); << 250 return std::sqrt(this->Mass2());
300 } 251 }
301 252
302 G4double G4FragmentingString::MassT2() const 253 G4double G4FragmentingString::MassT2() const
303 { 254 {
304 return Pplus*Pminus; << 255 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 } 256 }
343 257