1 | // SigmaCompositeness.h is a part of the PYTHIA event generator. |
---|
2 | // Copyright (C) 2012 Torbjorn Sjostrand. |
---|
3 | // PYTHIA is licenced under the GNU GPL version 2, see COPYING for details. |
---|
4 | // Please respect the MCnet Guidelines, see GUIDELINES for details. |
---|
5 | |
---|
6 | // Header file for compositiness-process differential cross sections. |
---|
7 | // Contains classes derived from SigmaProcess via Sigma(1/2)Process. |
---|
8 | |
---|
9 | #ifndef Pythia8_SigmaCompositeness_H |
---|
10 | #define Pythia8_SigmaCompositeness_H |
---|
11 | |
---|
12 | #include "SigmaProcess.h" |
---|
13 | |
---|
14 | namespace Pythia8 { |
---|
15 | |
---|
16 | //========================================================================== |
---|
17 | |
---|
18 | // A derived class for q g -> q^* (excited quark state). |
---|
19 | |
---|
20 | class Sigma1qg2qStar : public Sigma1Process { |
---|
21 | |
---|
22 | public: |
---|
23 | |
---|
24 | // Constructor. |
---|
25 | Sigma1qg2qStar(int idqIn) : idq(idqIn) {} |
---|
26 | |
---|
27 | // Initialize process. |
---|
28 | virtual void initProc(); |
---|
29 | |
---|
30 | // Calculate flavour-independent parts of cross section. |
---|
31 | virtual void sigmaKin(); |
---|
32 | |
---|
33 | // Evaluate sigmaHat(sHat). |
---|
34 | virtual double sigmaHat(); |
---|
35 | |
---|
36 | // Select flavour, colour and anticolour. |
---|
37 | virtual void setIdColAcol(); |
---|
38 | |
---|
39 | // Evaluate weight for q* decay angles (else inactive). |
---|
40 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
---|
41 | |
---|
42 | // Info on the subprocess. |
---|
43 | virtual string name() const {return nameSave;} |
---|
44 | virtual int code() const {return codeSave;} |
---|
45 | virtual string inFlux() const {return "qg";} |
---|
46 | virtual int resonanceA() const {return idRes;} |
---|
47 | |
---|
48 | private: |
---|
49 | |
---|
50 | // Parameters set at initialization or for current kinematics. |
---|
51 | int idq, idRes, codeSave; |
---|
52 | string nameSave; |
---|
53 | double mRes, GammaRes, m2Res, GamMRat, Lambda, coupFcol, widthIn, sigBW; |
---|
54 | |
---|
55 | // Pointer to properties of the particle species, to access decay channels. |
---|
56 | ParticleDataEntry* qStarPtr; |
---|
57 | |
---|
58 | }; |
---|
59 | |
---|
60 | //========================================================================== |
---|
61 | |
---|
62 | // A derived class for l gamma -> l^* (excited lepton state). |
---|
63 | |
---|
64 | class Sigma1lgm2lStar : public Sigma1Process { |
---|
65 | |
---|
66 | public: |
---|
67 | |
---|
68 | // Constructor. |
---|
69 | Sigma1lgm2lStar(int idlIn) : idl(idlIn) {} |
---|
70 | |
---|
71 | // Initialize process. |
---|
72 | virtual void initProc(); |
---|
73 | |
---|
74 | // Calculate flavour-independent parts of cross section. |
---|
75 | virtual void sigmaKin(); |
---|
76 | |
---|
77 | // Evaluate sigmaHat(sHat). |
---|
78 | virtual double sigmaHat(); |
---|
79 | |
---|
80 | // Select flavour, colour and anticolour. |
---|
81 | virtual void setIdColAcol(); |
---|
82 | |
---|
83 | // Evaluate weight for l* decay angles (else inactive). |
---|
84 | virtual double weightDecay( Event& process, int iResBeg, int iResEnd); |
---|
85 | |
---|
86 | // Info on the subprocess. |
---|
87 | virtual string name() const {return nameSave;} |
---|
88 | virtual int code() const {return codeSave;} |
---|
89 | virtual string inFlux() const {return "fgm";} |
---|
90 | virtual int resonanceA() const {return idRes;} |
---|
91 | |
---|
92 | private: |
---|
93 | |
---|
94 | // Parameters set at initialization or for current kinematics. |
---|
95 | int idl, idRes, codeSave; |
---|
96 | string nameSave; |
---|
97 | double mRes, GammaRes, m2Res, GamMRat, Lambda, coupChg, widthIn, sigBW; |
---|
98 | |
---|
99 | // Pointer to properties of the particle species, to access decay channels. |
---|
100 | ParticleDataEntry* qStarPtr; |
---|
101 | |
---|
102 | }; |
---|
103 | |
---|
104 | //========================================================================== |
---|
105 | |
---|
106 | // A derived class for q q' -> q^* q' (excited quark state). |
---|
107 | |
---|
108 | class Sigma2qq2qStarq : public Sigma2Process { |
---|
109 | |
---|
110 | public: |
---|
111 | |
---|
112 | // Constructor. |
---|
113 | Sigma2qq2qStarq(int idqIn) : idq(idqIn) {} |
---|
114 | |
---|
115 | // Initialize process. |
---|
116 | virtual void initProc(); |
---|
117 | |
---|
118 | // Calculate flavour-independent parts of cross section. |
---|
119 | virtual void sigmaKin(); |
---|
120 | |
---|
121 | // Evaluate sigmaHat(sHat). |
---|
122 | virtual double sigmaHat(); |
---|
123 | |
---|
124 | // Select flavour, colour and anticolour. |
---|
125 | virtual void setIdColAcol(); |
---|
126 | |
---|
127 | // Evaluate weight for q* decay angles (else inactive). |
---|
128 | virtual double weightDecay(Event& process, int iResBeg, int iResEnd); |
---|
129 | |
---|
130 | // Info on the subprocess. |
---|
131 | virtual string name() const {return nameSave;} |
---|
132 | virtual int code() const {return codeSave;} |
---|
133 | virtual string inFlux() const {return "qq";} |
---|
134 | virtual int id3Mass() const {return idRes;} |
---|
135 | |
---|
136 | private: |
---|
137 | |
---|
138 | // Parameters set at initialization or for current kinematics. |
---|
139 | int idq, idRes, codeSave; |
---|
140 | string nameSave; |
---|
141 | double Lambda, preFac, openFracPos, openFracNeg, sigmaA, sigmaB; |
---|
142 | |
---|
143 | }; |
---|
144 | |
---|
145 | //========================================================================== |
---|
146 | |
---|
147 | // A derived class for q qbar -> l^* lbar (excited lepton state). |
---|
148 | |
---|
149 | class Sigma2qqbar2lStarlbar : public Sigma2Process { |
---|
150 | |
---|
151 | public: |
---|
152 | |
---|
153 | // Constructor. |
---|
154 | Sigma2qqbar2lStarlbar(int idlIn) : idl(idlIn) {} |
---|
155 | |
---|
156 | // Initialize process. |
---|
157 | virtual void initProc(); |
---|
158 | |
---|
159 | // Calculate flavour-independent parts of cross section. |
---|
160 | virtual void sigmaKin(); |
---|
161 | |
---|
162 | // Evaluate sigmaHat(sHat). |
---|
163 | virtual double sigmaHat() {return sigma;} |
---|
164 | |
---|
165 | // Select flavour, colour and anticolour. |
---|
166 | virtual void setIdColAcol(); |
---|
167 | |
---|
168 | // Evaluate weight for l* decay angles (else inactive). |
---|
169 | virtual double weightDecay(Event& process, int iResBeg, int iResEnd); |
---|
170 | |
---|
171 | // Info on the subprocess. |
---|
172 | virtual string name() const {return nameSave;} |
---|
173 | virtual int code() const {return codeSave;} |
---|
174 | virtual string inFlux() const {return "qqbarSame";} |
---|
175 | virtual int id3Mass() const {return idRes;} |
---|
176 | |
---|
177 | private: |
---|
178 | |
---|
179 | // Parameters set at initialization or for current kinematics. |
---|
180 | int idl, idRes, codeSave; |
---|
181 | string nameSave; |
---|
182 | double Lambda, preFac, openFracPos, openFracNeg, sigma; |
---|
183 | |
---|
184 | }; |
---|
185 | |
---|
186 | //========================================================================== |
---|
187 | |
---|
188 | // A derived class for q q -> q q (quark contact interactions). |
---|
189 | // Based on, Sigma2qq2qq (QCD). |
---|
190 | |
---|
191 | class Sigma2QCqq2qq : public Sigma2Process { |
---|
192 | |
---|
193 | public: |
---|
194 | |
---|
195 | // Constructor. |
---|
196 | Sigma2QCqq2qq(){} |
---|
197 | |
---|
198 | // Initialize process. |
---|
199 | virtual void initProc(); |
---|
200 | |
---|
201 | // Calculate flavour-independent parts of cross section. |
---|
202 | virtual void sigmaKin(); |
---|
203 | |
---|
204 | // Evaluate d(sigmaHat)/d(tHat). |
---|
205 | virtual double sigmaHat(); |
---|
206 | |
---|
207 | // Select flavour, colour and anticolour. |
---|
208 | virtual void setIdColAcol(); |
---|
209 | |
---|
210 | // Info on the subprocess. |
---|
211 | virtual string name() const {return "q q(bar)' -> (QC) -> q q(bar)'";} |
---|
212 | virtual int code() const {return 4201;} |
---|
213 | virtual string inFlux() const {return "qq";} |
---|
214 | |
---|
215 | private: |
---|
216 | |
---|
217 | // Values stored for colour flow selection. |
---|
218 | double sigT, sigU, sigTU, sigST, sigSum, sigQCSTU, sigQCUTS; |
---|
219 | |
---|
220 | // Compositeness parameters. |
---|
221 | double qCLambda2; |
---|
222 | int qCetaLL, qCetaRR, qCetaLR; |
---|
223 | |
---|
224 | }; |
---|
225 | |
---|
226 | //========================================================================== |
---|
227 | |
---|
228 | // A derived class for q qbar -> q' qbar' (quark contact interactions). |
---|
229 | // Based on, Sigma2qqbar2qqbarNew(QCD). |
---|
230 | // Note: This process give the same contributions for q == q' and q != q'. |
---|
231 | |
---|
232 | class Sigma2QCqqbar2qqbar : public Sigma2Process { |
---|
233 | |
---|
234 | public: |
---|
235 | |
---|
236 | // Constructor. |
---|
237 | Sigma2QCqqbar2qqbar(){} |
---|
238 | |
---|
239 | // Initialize process. |
---|
240 | virtual void initProc(); |
---|
241 | |
---|
242 | // Calculate flavour-independent parts of cross section. |
---|
243 | virtual void sigmaKin(); |
---|
244 | |
---|
245 | // Evaluate d(sigmaHat)/d(tHat). |
---|
246 | virtual double sigmaHat() {return sigma;} |
---|
247 | |
---|
248 | // Select flavour, colour and anticolour. |
---|
249 | virtual void setIdColAcol(); |
---|
250 | |
---|
251 | // Info on the subprocess. |
---|
252 | virtual string name() const {return "q qbar -> (QC) -> q' qbar' (uds)";} |
---|
253 | virtual int code() const {return 4202;} |
---|
254 | virtual string inFlux() const {return "qqbarSame";} |
---|
255 | |
---|
256 | private: |
---|
257 | |
---|
258 | // Number of outgoing quark flavours to be considered, given that |
---|
259 | // matrix elements are calculated in the massless approximation. |
---|
260 | int qCnQuarkNew; |
---|
261 | |
---|
262 | // Values stored for colour flow selection. |
---|
263 | int idNew; |
---|
264 | double mNew, m2New, sigS, sigma; |
---|
265 | |
---|
266 | // Compositeness parameters. |
---|
267 | double qCLambda2; |
---|
268 | int qCetaLL, qCetaRR, qCetaLR; |
---|
269 | |
---|
270 | }; |
---|
271 | |
---|
272 | //========================================================================== |
---|
273 | |
---|
274 | // A derived class for f fbar -> l lbar |
---|
275 | // (contact interactions). |
---|
276 | // Does not include t-channel contributions relevant for e^+e^- to e^+e^- |
---|
277 | |
---|
278 | class Sigma2QCffbar2llbar : public Sigma2Process { |
---|
279 | |
---|
280 | public: |
---|
281 | |
---|
282 | // Constructor: bool Graviton = true, to use LED graviton settings. |
---|
283 | Sigma2QCffbar2llbar (int idIn, int codeIn) : idNew(idIn), codeNew(codeIn) {} |
---|
284 | |
---|
285 | // Initialize process. |
---|
286 | virtual void initProc(); |
---|
287 | |
---|
288 | // Calculate flavour-independent parts of cross section; |
---|
289 | // first step when inflavours unknown. |
---|
290 | virtual void sigmaKin(); |
---|
291 | |
---|
292 | // Evaluate sigmaHat(sHat); second step for given inflavours. |
---|
293 | virtual double sigmaHat(); |
---|
294 | |
---|
295 | // Select flavour, colour and anticolour. |
---|
296 | virtual void setIdColAcol(); |
---|
297 | |
---|
298 | // Info on the subprocess. |
---|
299 | virtual string name() const {return nameNew;} |
---|
300 | virtual int code() const {return codeNew;} |
---|
301 | virtual string inFlux() const {return "ffbarSame";} |
---|
302 | virtual bool isSChannel() const {return true;} |
---|
303 | |
---|
304 | private: |
---|
305 | |
---|
306 | // Process values. |
---|
307 | string nameNew; |
---|
308 | int idNew, codeNew; |
---|
309 | double qCmNew, qCmNew2, qCmZ, qCmZ2, qCGZ, qCGZ2, sigma0; |
---|
310 | |
---|
311 | // Compositeness parameters. |
---|
312 | double qCLambda2; |
---|
313 | int qCetaLL, qCetaRR, qCetaLR; |
---|
314 | double qCPropGm, qCrePropZ, qCimPropZ; |
---|
315 | |
---|
316 | }; |
---|
317 | |
---|
318 | //========================================================================== |
---|
319 | |
---|
320 | } // end namespace Pythia8 |
---|
321 | |
---|
322 | #endif // Pythia8_SigmaCompositeness_H |
---|