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Removing the flat makefiles
[u/mrichter/AliRoot.git] / TEvtGen / EvtGenModels / EvtLb2Lll.cxx
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da0e9ce3 1//----------------------------------------------------------------------------------
2//
3// Module: EvtLb2Lll.cpp
4//
5// Desription: Routine to implement Lambda_b0 -> Lambda_0 l+ l- decays accroding to
6// several models: Chen. Geng.
7// Aliev. Ozpineci. Savci.
8//
9// Modification history:
10//
11// 09/02/2009 PR Commented check for (anti-)Lambda0 names
12// 15/09/2004 PR Module created according to PHSP model
13// 20/02/2005 PR Added parameters, created matrix element (without polarization)
14// 04/03/2005 PR LD contrib., corrected WC eff. according to Chen. Geng.
15//
16//----------------------------------------------------------------------------------
17
18#ifdef WIN32
19#pragma warning( disable : 4786 )
20// Disable anoying warning about symbol size
21#endif
22
23#include "EvtGenModels/EvtLb2Lll.hh"
24#include "EvtGenBase/EvtParticle.hh"
25#include "EvtGenBase/EvtDiracParticle.hh"
26#include "EvtGenBase/EvtPDL.hh"
27#include "EvtGenBase/EvtDiracSpinor.hh"
28#include "EvtGenBase/EvtTensor4C.hh"
29#include "EvtGenBase/EvtVector4C.hh"
30#include "EvtGenBase/EvtVector4R.hh"
31#include "EvtGenBase/EvtComplex.hh"
32#include "EvtGenBase/EvtGammaMatrix.hh"
33#include <stdio.h>
34#include <string.h>
35
36EvtLb2Lll::~EvtLb2Lll() {}
37
38EvtDecayBase* EvtLb2Lll::clone(){
39 return new EvtLb2Lll;
40}
41
42std::string EvtLb2Lll::getName(){
43 return "Lb2Lll";
44}
45
46void EvtLb2Lll::init(){
47
48 if(getNArg()>8){ // Decay parameters
49 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll generator expected max. 8 arguments but found: " << getNArg() << std::endl;
50 report(INFO ,"EvtGen") << " 1. Lambda_b0 polarization - zero is default" << std::endl;
51 report(INFO ,"EvtGen") << " 2. Model type - \"SM\" for Standard Model is default" << std::endl;
52 report(INFO ,"EvtGen") << " 3. Form-Factors - \"HQET\" is used by default" << std::endl;
53 report(INFO ,"EvtGen") << " 4. How to set polarization - \"ModifiedSpinors\" is default" << std::endl;
54 report(INFO ,"EvtGen") << " 5. Include long distance (LD) effects - \"SD\" (no) is default" << std::endl;
55 report(INFO ,"EvtGen") << " 6. NonFactorizable contribution (omega) to b->sg decay at q2=0 " << std::endl;
56 report(INFO ,"EvtGen") << " 7. Note on every x-th decay" << std::endl;
57 report(INFO ,"EvtGen") << " 8. Maximum probability - automatic by default" << std::endl;
58 ::abort();
59 }
60
61 if(getNDaug()!=3){ // Check that there are 3 daughters only
62 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll generator expected 3 daughters but found: " << getNDaug() << std::endl;
63 ::abort();
64 }
65
66 // TODO: better check based on spin and falvour is needed to allow usage of aliases !
67 if(EvtPDL::name(getParentId())=="Lambda_b0"){ // Check daughters of Lambda_b0
68 report(INFO,"EvtGen") << " EvtLb2Lll generator found Lambda_b0" << std::endl;
69 //if(EvtPDL::name(getDaug(0))!="Lambda0"){
70 // report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll generator expected Lambda0 daughter but found: " << EvtPDL::name(getDaug(0)) << std::endl;
71 // ::abort();
72 //}
73 if(EvtPDL::name(getDaug(1))=="e-" && EvtPDL::name(getDaug(2))=="e+"){
74 m_decayName="Lambda_b0 -> Lambda0 e- e+";
75 report(INFO,"EvtGen") << " EvtLb2Lll generator found decay: Lambda_b0 -> Lambda0 e- e+" << std::endl;
76 }else if(EvtPDL::name(getDaug(1))=="mu-" && EvtPDL::name(getDaug(2))=="mu+"){
77 m_decayName="Lambda_b0 -> Lambda0 mu- mu+";
78 report(INFO,"EvtGen") << " EvtLb2Lll generator found decay: Lambda_b0 -> Lambda0 mu- mu+" << std::endl;
79 }else if(EvtPDL::name(getDaug(1))=="tau-" && EvtPDL::name(getDaug(2))=="tau+"){
80 m_decayName="Lambda_b0 -> Lambda0 tau- tau+";
81 report(INFO,"EvtGen") << " EvtLb2Lll generator found decay: Lambda_b0 -> Lambda0 tau- tau+" << std::endl;
82 }else{
83 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll generator expected lepton pair daughters but found: " << EvtPDL::name(getDaug(1)) << " " << EvtPDL::name(getDaug(2)) << std::endl;
84 ::abort();
85 }
86 //TODO: The model is known not to work correctly for anti-Lambda_b0 (A_FB does not change its sign)
87 }else if(EvtPDL::name(getParentId())=="anti-Lambda_b0"){ // Check daughters of anti-Lambda_b0
88 report(INFO,"EvtGen") << " EvtLb2Lll generator found anti-Lambda_b0" << std::endl;
89 //if(EvtPDL::name(getDaug(0))!="anti-Lambda0"){
90 // report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll generator expected anti-Lambda0 daughter but found: " << EvtPDL::name(getDaug(0)) << std::endl;
91 // ::abort();
92 //}
93 if(EvtPDL::name(getDaug(1))=="e+" && EvtPDL::name(getDaug(2))=="e-"){
94 m_decayName="anti-Lambda_b0 -> anti-Lambda0 e+ e-";
95 report(INFO,"EvtGen") << " EvtLb2Lll generator found decay: anti-Lambda_b0 -> anti-Lambda0 e+ e-" << std::endl;
96 }else if(EvtPDL::name(getDaug(1))=="mu+" && EvtPDL::name(getDaug(2))=="mu-"){
97 m_decayName="anti-Lambda_b0 -> anti-Lambda0 mu+ mu-";
98 report(INFO,"EvtGen") << " EvtLb2Lll generator found decay: anti-Lambda_b0 -> anti-Lambda0 mu+ mu-" << std::endl;
99 }else if(EvtPDL::name(getDaug(1))=="tau-" && EvtPDL::name(getDaug(2))=="tau+"){
100 m_decayName="anti-Lambda_b0 -> anti-Lambda0 tau+ tau-";
101 report(INFO,"EvtGen") << " EvtLb2Lll generator found decay: anti-Lambda_b0 -> anti-Lambda0 tau+ tau-" << std::endl;
102 }else{
103 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll generator expected lepton pair daughters but found: " << EvtPDL::name(getDaug(1)) << " " << EvtPDL::name(getDaug(2)) << std::endl;
104 ::abort();
105 }
106 }else{ // This model is not intended for decay of anything else than (anti-)Lambda_b0
107 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll generator expected (anti-)Lambda_b0 parent but found: " << EvtPDL::name(getParentId()) << std::endl;
108 ::abort();
109 }
110
111 // Read and check all parameters
112 if(getNArg()>0){
113 if(getArg(0)>1. || getArg(0)<-1.){
114 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll expects polarization to be in interval <-1,1>, not " << getArg(0) << std::endl;
115 ::abort();
116 }
117 m_polarizationLambdab0 = getArg(0);
118 }else{
119 m_polarizationLambdab0 = 0;
120 }
121 report(INFO,"EvtGen") << " EvtLb2Lll set Lambda_b0 polarization to " << m_polarizationLambdab0 << std::endl;
122
123 if(getNArg()>1){
124 if(getArgStr(1).substr(1,getArgStr(1).size()-2)!="SM" &&
125 getArgStr(1).substr(1,getArgStr(1).size()-2)!="-C7_SM" &&
126 getArgStr(1).substr(1,getArgStr(1).size()-2)!="SUSY-ChenGeng"){
127 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll doesn't know this physics model: " << getArgStr(1) << std::endl;
128 ::abort();
129 }
130 m_HEPmodel = getArgStr(1).substr(1,getArgStr(1).size()-2);
131 }else{
132 m_HEPmodel = "SM";
133 }
134 report(INFO,"EvtGen") << " EvtLb2Lll will use this physics model: " << m_HEPmodel << std::endl;
135
136 if(getNArg()>2){
137 if(getArgStr(2).substr(1,getArgStr(2).size()-2)!="HQET" &&
138 getArgStr(2).substr(1,getArgStr(2).size()-2)!="HQET-noF2" &&
139 getArgStr(2).substr(1,11) !="HQET-delta="){
140 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll doesn't know this Form-Factors model: " << getArgStr(2) << std::endl;
141 ::abort();
142 }
143 m_FFtype = getArgStr(2).substr(1,getArgStr(2).size()-2);
144 }else{
145 m_FFtype = "HQET";
146 }
147 report(INFO,"EvtGen") << " EvtLb2Lll will use this Form-Factors model: " << m_FFtype << std::endl;
148
149 if(getNArg()>3){
150 if(getArgStr(3).substr(1,getArgStr(3).size()-2)!="Unpolarized"){
151 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll doesn't know kind of introducing polarization: " << getArgStr(3) << std::endl;
152 ::abort();
153 }
154 m_polarizationIntroduction = getArgStr(3).substr(1,getArgStr(3).size()-2);
155 }else{
156 m_polarizationIntroduction = "Unpolarized";
157 }
158 report(INFO,"EvtGen") << " EvtLb2Lll will use this kind of introducing polarization: " << m_polarizationIntroduction << std::endl;
159
160 if(getNArg()>4){
161 if(getArgStr(4).substr(1,getArgStr(4).size()-2)!="SD" && getArgStr(4).substr(1,getArgStr(4).size()-2)!="LD"){
162 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll didn't find SD or LD parameter: " << getArgStr(4) << std::endl;
163 ::abort();
164 }
165 m_effectContribution = getArgStr(5).substr(1,getArgStr(4).size()-2);
166 }else{
167 m_effectContribution = "SD";
168 }
169 report(INFO,"EvtGen") << " EvtLb2Lll will include contribution from these effects: " << m_effectContribution << std::endl;
170
171 if(getNArg()>5){
172 if(fabs(getArg(5))>0.15){
173 report(WARNING,"EvtGen") << " WARNING: EvtLb2Lll found very high contribution to b->sg decay at q2=0: " << getArg(5) << std::endl;
174 }
175 m_omega = getArg(5);
176 }else{
177 m_omega = 0;
178 }
179 report(INFO,"EvtGen") << " EvtLb2Lll will use this contribution to b->sg decay at q2=0: " << m_omega << std::endl;
180
181 if(getNArg()>6) m_noTries = (long)(getArg(6));
182 else m_noTries = 0;
183
184 if(getNArg()>7){
185 if(getArg(7)<0.){
186 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll expects positive maximum probability not : " << getArg(7) << std::endl;
187 ::abort();
188 }
189 m_maxProbability = getArg(7);
190 }else{
191 m_maxProbability = 0.;
192 }
193 report(INFO,"EvtGen") << " EvtLb2Lll maximum probability was set to " << m_maxProbability << std::endl;
194 m_poleSize=0;
195
196 // Initialize Wilson coeficients by Buras and Munz
197 // TODO: should have common W.C. source for all decays in EvtGen
198 m_WC.CalculateAllCoeficients();
199
200}
201
202void EvtLb2Lll::initProbMax(){
203
204 report(INFO,"EvtGen") << " EvtLb2Lll is finding maximum probability ... " << std::endl;
205
206 if(m_maxProbability==0){
207
208 EvtDiracParticle *parent = new EvtDiracParticle;
209 parent->noLifeTime();
210 parent->init(getParentId(),EvtVector4R(EvtPDL::getMass(getParentId()),0,0,0));
211 parent->setDiagonalSpinDensity();
212
213 EvtAmp amp;
214 EvtId daughters[3] = {getDaug(0),getDaug(1),getDaug(2)};
215 amp.init(getParentId(),3,daughters);
216 parent->makeDaughters(3,daughters);
217 EvtParticle *lambda = parent->getDaug(0);
218 EvtParticle *lep1 = parent->getDaug(1);
219 EvtParticle *lep2 = parent->getDaug(2);
220 lambda -> noLifeTime();
221 lep1 -> noLifeTime();
222 lep2 -> noLifeTime();
223
224 EvtSpinDensity rho;
225 rho.setDiag(parent->getSpinStates());
226
227 double M0 = EvtPDL::getMass(getParentId());
228 double mL = EvtPDL::getMass(getDaug(0));
229 double m1 = EvtPDL::getMass(getDaug(1));
230 double m2 = EvtPDL::getMass(getDaug(2));
231
232 double q2,pstar,elambda,theta;
233 double q2min = (m1+m2)*(m1+m2);
234 double q2max = (M0-mL)*(M0-mL);
235
236 EvtVector4R p4lambda,p4lep1,p4lep2,boost;
237
238 report(INFO,"EvtGen") << " EvtLb2Lll is probing whole phase space ..." << std::endl;
239
240 int i,j;
241 double prob=0;
242 for(i=0;i<=100;i++){
243 q2 = q2min+i*(q2max-q2min)/100.;
244 elambda = (M0*M0+mL*mL-q2)/2/M0;
245 if(i==0) pstar = 0;
246 else pstar = sqrt(q2-(m1+m2)*(m1+m2))*sqrt(q2-(m1-m2)*(m1-m2))/2/sqrt(q2);
247 boost.set(M0-elambda,0,0,+sqrt(elambda*elambda-mL*mL));
248 p4lambda.set(elambda,0,0,-sqrt(elambda*elambda-mL*mL));
249 for(j=0;j<=45;j++){
250 theta = j*EvtConst::pi/45;
251 p4lep1.set(sqrt(pstar*pstar+m1*m1),0,+pstar*sin(theta),+pstar*cos(theta));
252 p4lep2.set(sqrt(pstar*pstar+m2*m2),0,-pstar*sin(theta),-pstar*cos(theta));
253 //std::cout << "p1: " << p4lep1 << " p2: " << p4lep2 << " pstar: " << pstar << std::endl;
254 p4lep1 = boostTo(p4lep1,boost);
255 p4lep2 = boostTo(p4lep1,boost);
256 lambda -> init(getDaug(0),p4lambda);
257 lep1 -> init(getDaug(1),p4lep1 );
258 lep2 -> init(getDaug(2),p4lep2 );
259 calcAmp(&amp,parent);
260 prob = rho.normalizedProb(amp.getSpinDensity());
261 //std::cout << "q2: " << q2 << " \t theta: " << theta << " \t prob: " << prob << std::endl;
262 //std::cout << "p1: " << p4lep1 << " p2: " << p4lep2 << " q2-q2min: " << q2-(m1+m2)*(m1+m2) << std::endl;
263 if(prob>m_maxProbability){
264 report(INFO,"EvtGen") << " - probability " << prob << " found at q2 = " << q2 << " (" << 100*(q2-q2min)/(q2max-q2min) << " %) and theta = " << theta*180/EvtConst::pi << std::endl;
265 m_maxProbability=prob;
266 }
267 }
268 //::abort();
269 }
270
271 //m_poleSize = 0.04*q2min;
272 m_maxProbability *= 1.2;
273 delete parent;
274 }
275
276 setProbMax(m_maxProbability);
277 report(INFO,"EvtGen") << " EvtLb2Lll set up maximum probability to " << m_maxProbability << std::endl;
278
279}
280
281void EvtLb2Lll::decay(EvtParticle* parent){
282
283 //setWeight(parent->initializePhaseSpace(getNDaug(),getDaugs(),m_poleSize,1,2));
284 parent->initializePhaseSpace(getNDaug(),getDaugs());
285 calcAmp(&_amp2,parent);
286
287}
288
289void EvtLb2Lll::calcAmp(EvtAmp *amp,EvtParticle *parent){
290
291 static long noTries=0;
292 static double delta=0;
293
294 EvtComplex Matrix[2][2][2][2];
295
296 EvtComplex i1(0,1);
297
298 int i,j,spins[4];
299 char ch;
300
301 double r,M_L,M_Lb,M_s,M_c,M_b,q2,alpha,alpha_s,eta,M_W,M_t;
302 double M_psi[2]={0,0},Gamma_psi[2]={0,0},k_psi[2]={0,0};
303 double F0_1,F0_2,a_F1,a_F2,b_F1,b_F2,F1,F2;
304 double f_1,f_2,f_3,g_1,g_2,g_3,f_1T,f_2T,f_3T,g_1T,g_2T,g_3T,f_TV,f_TS,g_TV,g_TS,f_T,g_T;
305 EvtComplex A1,A2,A3,B1,B2,B3,D1,D2,D3,E1,E2,E3,N1,N2,H1,H2;
306 EvtComplex C_SL,C_BR,C_LLtot,C_LRtot,C_LL,C_LR,C_RL,C_RR,C_LRLR,C_RLLR,C_LRRL,C_RLRL,C_T,C_TE;
307 EvtComplex Yld,C_7eff,C_9eff;
308 EvtComplex V_ts,V_tb;
309
310 EvtVector4C lbar_Gmu_l[2][2],lbar_GmuG5_l[2][2],hbar_GmuPlusG5_h[2][2],hbar_GmuMinusG5_h[2][2],hbar_Gmu_h[2][2];
311 EvtComplex lbar_l[2][2],lbar_G5_l[2][2],hbar_1PlusG5_h[2][2],hbar_1MinusG5_h[2][2],hbar_G5_h[2][2],hbar_h[2][2];
312 EvtTensor4C lbar_Smunu_l[2][2],lbar_ESmunu_l[2][2],hbar_SmunuPlusG5_h[2][2],hbar_SmunuMinusG5_h[2][2],hbar_Smunu_h[2][2];
313 EvtVector4R q_mu,P_mu;
314
315 EvtDiracSpinor parent__spParent[2];
316
317 M_Lb = parent->mass();
318 M_L = parent->getDaug(0)->mass();
319 M_s = 0.13;
320 M_c = 1.35;
321 M_b = 4.8;
322 alpha = 1./137.036;
323 alpha_s = 0.217484;
324 eta = 0.556289;
325 M_W = 80.425;
326 M_t = 174.3;
327 M_psi[0] = 3.096916;
328 M_psi[1] = 3.686093;
329 if(m_decayName=="Lambda_b0 -> Lambda0 e- e+" || m_decayName=="anti-Lambda_b0 -> anti-Lambda0 e+ e-"){
330 Gamma_psi[0] = 5.40;
331 Gamma_psi[1] = 2.12;
332 }
333 if(m_decayName=="Lambda_b0 -> Lambda0 mu- mu+" || m_decayName=="anti-Lambda_b0 -> anti-Lambda0 mu+ mu-"){
334 Gamma_psi[0] = 5.35;
335 Gamma_psi[1] = 2.05;
336 }
337 if(m_decayName=="Lambda_b0 -> Lambda0 tau- tau+" || m_decayName=="anti-Lambda_b0 -> anti-Lambda0 tau+ tau-"){
338 Gamma_psi[0] = 0.00;
339 Gamma_psi[1] = 0.79;
340 }
341 if(m_effectContribution=="LD"){
342 k_psi[0] = 1.65;
343 k_psi[1] = 1.65;
344 }
345 //G_F = 1.16637e-5;
346 //V_tb = sqrt(1-pow(0.0413,2))*sqrt(1-pow(0.0037,2));
347 //V_ts = -sqrt(1-pow(0.2243,2))*0.0413-0.2243*sqrt(1-pow(0.0413,2))*0.0037*(cos(60*EvtConst::pi/180)+i1*sin(60*EvtConst::pi/180));
348
349 P_mu = parent->getP4Restframe()+parent->getDaug(0)->getP4();
350 q_mu = parent->getP4Restframe()-parent->getDaug(0)->getP4();
351 q2 = q_mu.mass2();
352
353 if(m_noTries>0) if(!((++noTries)%m_noTries)) report(DEBUG,"EvtGen") << " EvtLb2Lll already finished " << noTries << " matrix element calculations" << std::endl;
354
355 if(m_FFtype=="HQET"){
356 r = M_L*M_L/M_Lb/M_Lb;
357 F0_1 = +0.462;
358 F0_2 = -0.077;
359 a_F1 = -0.0182;
360 a_F2 = -0.0685;
361 b_F1 = -0.000176;
362 b_F2 = +0.001460;
363 F1 = F0_1/(1.0-(q2/M_Lb/M_Lb)*(a_F1-b_F1*(q2/M_Lb/M_Lb)));
364 F2 = F0_2/(1.0-(q2/M_Lb/M_Lb)*(a_F2-b_F2*(q2/M_Lb/M_Lb)));
365 g_1 = f_1 = f_2T = g_2T = F1+sqrt(r)*F2;
366 //std::cout << " F1: " << F1 << " F2: " << F2 << " r: " << r << " M_L: " << M_L << " M_Lb: " << M_Lb << std::endl;
367 //std::cout << " sqrt(q2): " << sqrt(q2) << " q2: " << q2 << " M_Lb^2" << M_Lb*M_Lb << std::endl;
368 g_2 = f_2 = g_3 = f_3 = g_TV = f_TV = F2/M_Lb;
369 g_TS = f_TS = 0;
370 g_1T = f_1T = F2/M_Lb*q2;
371 g_3T = +F2/M_Lb*(M_Lb+M_L);
372 f_3T = -F2/M_Lb*(M_Lb-M_L);
373 f_T = f_2T-f_TS*q2;
374 g_T = g_2T-g_TS*q2;
375 }else if(strstr(m_FFtype.c_str(),"HQET-delta=")==m_FFtype.c_str()){
376 //report(WARNING,"EvtGen") << " WARNING: HQET-delta FF model should be checked for correctness" << std::endl;
377 if(delta==0) sscanf(m_FFtype.c_str(),"%c%c%c%c%c%c%c%c%c%c%c%lf",&ch,&ch,&ch,&ch,&ch,&ch,&ch,&ch,&ch,&ch,&ch,&delta);
378 r = M_L*M_L/M_Lb/M_Lb;
379 F0_1 = +0.462;
380 F0_2 = -0.077;
381 a_F1 = -0.0182;
382 a_F2 = -0.0685;
383 b_F1 = -0.000176;
384 b_F2 = +0.001460;
385 F1 = F0_1/(1.0-(q2/M_Lb/M_Lb)*(a_F1-b_F1*(q2/M_Lb/M_Lb)));
386 F2 = F0_2/(1.0-(q2/M_Lb/M_Lb)*(a_F2-b_F2*(q2/M_Lb/M_Lb)));
387 g_1 = f_1 = f_2T = g_2T = F1+sqrt(r)*F2;
388 g_1 += delta*g_1;
389 f_1 -= delta*f_1;
390 g_2 = f_2 = g_3 = f_3 = g_TV = f_TV = F2/M_Lb;
391 g_TS = f_TS = 0;
392 g_1T = f_1T = F2/M_Lb*q2;
393 g_3T = +F2/M_Lb*(M_Lb+M_L);
394 f_3T = -F2/M_Lb*(M_Lb-M_L);
395 f_T = f_2T-f_TS*q2;
396 g_T = g_2T-g_TS*q2;
397 }else if(m_FFtype=="HQET-noF2"){
398 //report(WARNING,"EvtGen") << " WARNING: HQET-noF2 FF model should be checked for correctness" << std::endl;
399 r = M_L*M_L/M_Lb/M_Lb;
400 F0_1 = +0.462;
401 a_F1 = -0.0182;
402 b_F1 = -0.000176;
403 F1 = F0_1/(1.0-(q2/M_Lb/M_Lb)*(a_F1-b_F1*(q2/M_Lb/M_Lb)));
404 g_1 = f_1 = f_2T = g_2T = F1;
405 g_2 = f_2 = g_3 = f_3 = g_TV = f_TV = 0;
406 g_TS = f_TS = 0;
407 g_1T = f_1T = 0;
408 g_3T = 0;
409 f_3T = 0;
410 f_T = f_2T-f_TS*q2;
411 g_T = g_2T-g_TS*q2;
412 }else{ // general relations for Form-Factors
413 f_1 = f_2 = f_3 = g_1 = g_2 = g_3 = f_3T = g_3T = f_TS = g_TS = f_T = g_T = f_TV = 0;
414 f_2T = f_T+f_TS*q2;
415 f_1T = (f_TV+f_TS*(M_L+M_Lb))*q2;
416 f_1T = -q2/(M_Lb-M_L)*f_3T;
417 g_2T = g_T+g_TS*q2;
418 g_1T = (g_TV-g_TS*(M_L-M_Lb))*q2;
419 g_1T = +q2/(M_Lb+M_L)*g_3T;
420 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll - unknown Form-Factors model: " << m_FFtype << " - this should never happen !" << std::endl;
421 ::abort();
422 }
423
424 if(m_HEPmodel=="SM"){
425 C_LL=C_LR=C_RL=C_RR=C_LRLR=C_RLLR=C_LRRL=C_RLRL=C_T=C_TE=EvtComplex(0,0);
426 Yld = m_WC.Yld(q2,k_psi,Gamma_psi,M_psi,2,m_WC.GetC1(),m_WC.GetC2(),m_WC.GetC3(),m_WC.GetC4(),m_WC.GetC5(),m_WC.GetC6(),1./alpha);
427 C_7eff = m_WC.GetC7eff0() + m_WC.C7b2sg(m_WC.GetStrongCouplingConst(),m_WC.GetEta(),m_WC.GetC2(),M_t,M_W) + m_omega*(m_WC.hzs(M_c/M_b,q2/M_b/M_b,M_b,M_b) + Yld);
428 C_9eff = Yld + m_WC.C9efftilda(M_c/M_b,q2/M_b/M_b,m_WC.GetStrongCouplingConst(),m_WC.GetC1(),m_WC.GetC2(),m_WC.GetC3(),m_WC.GetC4(),m_WC.GetC5(),m_WC.GetC6(),m_WC.GetC9tilda(),m_WC.GetRenormSchemePar());
429 C_SL = -2*M_s*C_7eff;
430 C_BR = -2*M_b*C_7eff;
431 C_LLtot = C_9eff-m_WC.GetC10tilda()+C_LL;
432 C_LRtot = C_9eff+m_WC.GetC10tilda()+C_LR;
433 //std::cout << "Yld: " << Yld << " C7eff: " << C_7eff << " C_9eff: " << C_9eff << " Diff7: " << C_7eff-m_WC.GetC7eff0() << " Diff9: " << C_9eff-m_WC.GetC9tilda() << std::endl;
434 }else if(m_HEPmodel=="-C7_SM"){
435 C_LL=C_LR=C_RL=C_RR=C_LRLR=C_RLLR=C_LRRL=C_RLRL=C_T=C_TE=EvtComplex(0,0);
436 Yld = m_WC.Yld(q2,k_psi,Gamma_psi,M_psi,2,m_WC.GetC1(),m_WC.GetC2(),m_WC.GetC3(),m_WC.GetC4(),m_WC.GetC5(),m_WC.GetC6(),1./alpha);
437 C_7eff = m_WC.GetC7eff0() + m_WC.C7b2sg(m_WC.GetStrongCouplingConst(),m_WC.GetEta(),m_WC.GetC2(),M_t,M_W) + m_omega*(m_WC.hzs(M_c/M_b,q2/M_b/M_b,M_b,M_b) + Yld);
438 C_9eff = Yld + m_WC.C9efftilda(M_c/M_b,q2/M_b/M_b,m_WC.GetStrongCouplingConst(),m_WC.GetC1(),m_WC.GetC2(),m_WC.GetC3(),m_WC.GetC4(),m_WC.GetC5(),m_WC.GetC6(),m_WC.GetC9tilda(),m_WC.GetRenormSchemePar());
439 C_SL = +2*M_s*C_7eff;
440 C_BR = +2*M_b*C_7eff;
441 C_LLtot = C_9eff-m_WC.GetC10tilda()+C_LL;
442 C_LRtot = C_9eff+m_WC.GetC10tilda()+C_LR;
443 //std::cout << "Yld: " << Yld << " C7eff: " << C_7eff << " C_9eff: " << C_9eff << " Diff7: " << C_7eff-m_WC.GetC7eff0() << " Diff9: " << C_9eff-m_WC.GetC9tilda() << std::endl;
444 }else if(m_HEPmodel=="SUSY-ChenGeng"){
445 //report(WARNING,"EvtGen") << " WARNING: SUSY-ChenGeng model should be checked for correctness" << std::endl;
446 C_LL=C_LR=C_RL=C_RR=C_LRLR=C_RLLR=C_LRRL=C_RLRL=C_T=C_TE=EvtComplex(0,0);
447 EvtComplex d_u23LL = 0.1;
448 EvtComplex d_u33RL = 0.65;
449 EvtComplex d_d23LR = 0.03*exp(i1*EvtConst::pi*2/5);
450 EvtComplex d_u23LR = -0.8*exp(i1*EvtConst::pi/4);
451 EvtComplex C_7susy = -1.75*d_u23LL - 0.25*d_u23LR - 10.3*d_d23LR;
452 EvtComplex C_9susy = 0.82*d_u23LR;
453 EvtComplex C_10susy = -9.37*d_u23LR + 1.4*d_u23LR*d_u33RL + 2.7*d_u23LL;
454 Yld = m_WC.Yld(q2,k_psi,Gamma_psi,M_psi,2,m_WC.GetC1(),m_WC.GetC2(),m_WC.GetC3(),m_WC.GetC4(),m_WC.GetC5(),m_WC.GetC6(),1./alpha);
455 C_7eff = m_WC.GetC7eff0() + C_7susy*pow(m_WC.GetEta(),16./23.) + m_WC.C7b2sg(m_WC.GetStrongCouplingConst(),m_WC.GetEta(),m_WC.GetC2(),M_t,M_W) + m_omega*(m_WC.hzs(M_c/M_b,q2/M_b/M_b,M_b,M_b) + Yld);
456 C_9eff = Yld + m_WC.C9efftilda(M_c/M_b,q2/M_b/M_b,m_WC.GetStrongCouplingConst(),m_WC.GetC1(),m_WC.GetC2(),m_WC.GetC3(),m_WC.GetC4(),m_WC.GetC5(),m_WC.GetC6(),m_WC.GetC9tilda()+C_9susy,m_WC.GetRenormSchemePar());
457 C_SL = -2*M_s*C_7eff;
458 C_BR = -2*M_b*C_7eff;
459 C_LLtot = C_9eff-m_WC.GetC10tilda()-C_10susy+C_LL;
460 C_LRtot = C_9eff+m_WC.GetC10tilda()+C_10susy+C_LR;
461 //std::cout << "Yld: " << Yld << " C7eff: " << C_7eff << " C_9eff: " << C_9eff << " Diff7: " << C_7eff-m_WC.GetC7eff0() << " Diff9: " << C_9eff-m_WC.GetC9tilda() << std::endl;
462 }else{
463 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll - unknown physics model: " << m_HEPmodel << " - this should never happen !" << std::endl;
464 ::abort();
465 }
466
467 A1 = (f_1T-g_1T)*C_SL/q2 + (f_1T+g_1T)*C_BR/q2 + 0.5*(f_1-g_1)*(C_LLtot+C_LRtot) + 0.5*(f_1+g_1)*(C_RL+C_RR);
468 //std::cout << "f_1T: " << f_1T << " g_1T: " << g_1T << " C_SL: " << C_SL << " C_BR: " << C_BR << " f_1: " << f_1 << " g_1: " << g_1 << " C_LLtot: " << C_LLtot << " C_LRtot: " << C_LRtot << " C_RL: " << C_RL << " C_RR: " << C_RR << std::endl;
469 A2 = (f_2T-g_2T)*C_SL/q2 + (f_2T+g_2T)*C_BR/q2 + 0.5*(f_2-g_2)*(C_LLtot+C_LRtot) + 0.5*(f_2+g_2)*(C_RL+C_RR);
470 A3 = (f_3T-g_3T)*C_SL/q2 + (f_3T+g_3T)*C_BR/q2 + 0.5*(f_3-g_3)*(C_LLtot+C_LRtot) + 0.5*(f_3+g_3)*(C_RL+C_RR);
471
472 B1 = (f_1T+g_1T)*C_SL/q2 + (f_1T-g_1T)*C_BR/q2 + 0.5*(f_1+g_1)*(C_LLtot+C_LRtot) + 0.5*(f_1-g_1)*(C_RL+C_RR);
473 B2 = (f_2T+g_2T)*C_SL/q2 + (f_2T-g_2T)*C_BR/q2 + 0.5*(f_2+g_2)*(C_LLtot+C_LRtot) + 0.5*(f_2-g_2)*(C_RL+C_RR);
474 B3 = (f_3T+g_3T)*C_SL/q2 + (f_3T-g_3T)*C_BR/q2 + 0.5*(f_3+g_3)*(C_LLtot+C_LRtot) + 0.5*(f_3-g_3)*(C_RL+C_RR);
475
476 D1 = 0.5*(C_RR-C_RL)*(f_1+g_1) + 0.5*(C_LRtot-C_LLtot)*(f_1-g_1);
477 D2 = 0.5*(C_RR-C_RL)*(f_2+g_2) + 0.5*(C_LRtot-C_LLtot)*(f_2-g_2);
478 D3 = 0.5*(C_RR-C_RL)*(f_3+g_3) + 0.5*(C_LRtot-C_LLtot)*(f_3-g_3);
479
480 E1 = 0.5*(C_RR-C_RL)*(f_1-g_1) + 0.5*(C_LRtot-C_LLtot)*(f_1+g_1);
481 E2 = 0.5*(C_RR-C_RL)*(f_2-g_2) + 0.5*(C_LRtot-C_LLtot)*(f_2+g_2);
482 E3 = 0.5*(C_RR-C_RL)*(f_3-g_3) + 0.5*(C_LRtot-C_LLtot)*(f_3+g_3);
483
484 N1 = (f_1*(M_Lb+M_L)+f_3*q2)/M_b*(C_LRLR+C_RLLR+C_LRRL+C_RLRL);
485 N2 = (f_1*(M_Lb+M_L)+f_3*q2)/M_b*(C_LRLR+C_RLLR-C_LRRL-C_RLRL);
486
487 H1 = (g_1*(M_Lb+M_L)-g_3*q2)/M_b*(C_LRLR-C_RLLR+C_LRRL-C_RLRL);
488 H2 = (g_1*(M_Lb+M_L)-g_3*q2)/M_b*(C_LRLR-C_RLLR-C_LRRL+C_RLRL);
489
490 for(i=0;i<4;i++){
491 lbar_Gmu_l [i/2][i%2] = EvtLeptonVCurrent(parent->getDaug(1)->spParent(i/2),parent->getDaug(2)->spParent(i%2));
492 lbar_GmuG5_l [i/2][i%2] = EvtLeptonACurrent(parent->getDaug(1)->spParent(i/2),parent->getDaug(2)->spParent(i%2));
493 lbar_l [i/2][i%2] = EvtLeptonSCurrent(parent->getDaug(1)->spParent(i/2),parent->getDaug(2)->spParent(i%2));
494 lbar_G5_l [i/2][i%2] = EvtLeptonPCurrent(parent->getDaug(1)->spParent(i/2),parent->getDaug(2)->spParent(i%2));
495 lbar_Smunu_l [i/2][i%2] = EvtLeptonTCurrent(parent->getDaug(1)->spParent(i/2),parent->getDaug(2)->spParent(i%2));
496 lbar_ESmunu_l[i/2][i%2] = dual(EvtLeptonTCurrent(parent->getDaug(1)->spParent(i/2),parent->getDaug(2)->spParent(i%2)));
497 }
498
499 // TODO: polarization not yet introduced
500 if(m_polarizationIntroduction=="SpinDensityMatrix"){
501 //parent->setSpinDensityForward();
502 parent__spParent[0]=parent->sp(0);
503 parent__spParent[1]=parent->sp(1);
504 }else if(m_polarizationIntroduction=="ModifiedSpinors"){
505 parent__spParent[0]=parent->sp(0);
506 parent__spParent[1]=parent->sp(1);
507 }else if(m_polarizationIntroduction=="Unpolarized"){
508 parent__spParent[0]=parent->sp(0);
509 parent__spParent[1]=parent->sp(1);
510 }else{
511 report(ERROR,"EvtGen") << " ERROR: EvtLb2Lll - unknown polarization: " << m_polarizationIntroduction << " - this should never happen !" << std::endl;
512 ::abort();
513 }
514
515 for(i=0;i<4;i++){
516 hbar_GmuPlusG5_h [i/2][i%2] = EvtLeptonVCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]) + EvtLeptonACurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
517 hbar_GmuMinusG5_h [i/2][i%2] = EvtLeptonVACurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
518 hbar_SmunuPlusG5_h [i/2][i%2] = EvtLeptonTCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]) + EvtLeptonTG5Current(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
519 hbar_SmunuMinusG5_h[i/2][i%2] = EvtLeptonTCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]) - EvtLeptonTG5Current(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
520 hbar_1PlusG5_h [i/2][i%2] = EvtLeptonSCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]) + EvtLeptonPCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
521 hbar_1MinusG5_h [i/2][i%2] = EvtLeptonSCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]) - EvtLeptonPCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
522 hbar_G5_h [i/2][i%2] = EvtLeptonPCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
523 hbar_h [i/2][i%2] = EvtLeptonSCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
524 hbar_Smunu_h [i/2][i%2] = EvtLeptonTCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
525 hbar_Gmu_h [i/2][i%2] = EvtLeptonVCurrent(parent->getDaug(0)->spParent(i/2),parent__spParent[i%2]);
526 }
527
528 for(i=0;i<4;i++) for(j=0;j<4;j++) {
529 //std::cout << "--------------------------------------------------" << std::endl;
530 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
531 Matrix[j/2][j%2][i/2][i%2] += lbar_Gmu_l[i/2][i%2] * (A1*hbar_GmuPlusG5_h[j/2][j%2]+B1*hbar_GmuMinusG5_h[j/2][j%2]);
532 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
533 //std::cout << "A1: " << A1 << " B1: " << B1 << " lbar_Gmu_l: " << lbar_Gmu_l[i/2][i%2] <<
534 // " hbar_GmuPlusG5_h: " << hbar_GmuPlusG5_h[j/2][j%2] << " hbar_GmuMinusG5_h: " << hbar_GmuMinusG5_h[j/2][j%2] <<
535 // " sp1: " << parent->getDaug(1)->spParent(i/2) << " sp2: " << parent->getDaug(1)->spParent(i%2) << std::endl;
536 Matrix[j/2][j%2][i/2][i%2] += lbar_Gmu_l[i/2][i%2] * (i1*A2*(hbar_SmunuPlusG5_h[j/2][j%2].cont2(q_mu))+B2*(hbar_SmunuMinusG5_h[j/2][j%2].cont2(q_mu)));
537 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
538 Matrix[j/2][j%2][i/2][i%2] += lbar_Gmu_l[i/2][i%2] * ((A3*hbar_1PlusG5_h[j/2][j%2]+B3*hbar_1MinusG5_h[j/2][j%2])*q_mu);
539 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
540 Matrix[j/2][j%2][i/2][i%2] += lbar_GmuG5_l[i/2][i%2] * (D1*hbar_GmuPlusG5_h[j/2][j%2]+E1*hbar_GmuMinusG5_h[j/2][j%2]);
541 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
542 Matrix[j/2][j%2][i/2][i%2] += lbar_GmuG5_l[i/2][i%2] * (i1*D2*(hbar_SmunuPlusG5_h[j/2][j%2].cont2(q_mu))+E2*(hbar_SmunuMinusG5_h[j/2][j%2].cont2(q_mu)));
543 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
544 Matrix[j/2][j%2][i/2][i%2] += lbar_GmuG5_l[i/2][i%2] * ((D3*hbar_1PlusG5_h[j/2][j%2]+E3*hbar_1MinusG5_h[j/2][j%2])*q_mu);
545 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
546 Matrix[j/2][j%2][i/2][i%2] += lbar_l[i/2][i%2] * (N1*hbar_h[j/2][j%2]+H1*hbar_G5_h[j/2][j%2]);
547 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
548 Matrix[j/2][j%2][i/2][i%2] += lbar_G5_l[i/2][i%2] * (N2*hbar_h[j/2][j%2]+H2*hbar_G5_h[j/2][j%2]);
549 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
550 Matrix[j/2][j%2][i/2][i%2] += cont(lbar_Smunu_l[i/2][i%2] , 4*C_T*f_T*hbar_Smunu_h[j/2][j%2]);
551 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
552 Matrix[j/2][j%2][i/2][i%2] += cont(lbar_Smunu_l[i/2][i%2] , -4*C_T*f_TV*i1*(directProd(q_mu,hbar_Gmu_h[j/2][j%2])-directProd(hbar_Gmu_h[j/2][j%2],q_mu)));
553 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
554 Matrix[j/2][j%2][i/2][i%2] += cont(lbar_Smunu_l[i/2][i%2] , -4*C_T*f_TS*i1*(directProd(P_mu,q_mu)-directProd(q_mu,P_mu))*hbar_h[j/2][j%2]);
555 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
556 Matrix[j/2][j%2][i/2][i%2] += cont(lbar_ESmunu_l[i/2][i%2] , 4*C_TE*f_T*i1*hbar_Smunu_h[j/2][j%2]);
557 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
558 Matrix[j/2][j%2][i/2][i%2] += cont(lbar_ESmunu_l[i/2][i%2] , 4*C_TE*f_TV*(directProd(q_mu,hbar_Gmu_h[j/2][j%2])-directProd(hbar_Gmu_h[j/2][j%2],q_mu)));
559 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
560 Matrix[j/2][j%2][i/2][i%2] += cont(lbar_ESmunu_l[i/2][i%2] , 4*C_TE*f_TS*(directProd(P_mu,q_mu)-directProd(q_mu,P_mu))*hbar_h[j/2][j%2]);
561 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
562 //Matrix[j/2][j%2][i/2][i%2] *= G_F*alpha/4/sqrt(2)/EvtConst::pi*V_tb*conj(V_ts);
563 //std::cout << "Matrix = " << Matrix[j/2][j%2][i/2][i%2] << std::endl;
564 //std::cout << "--------------------------------------------------" << std::endl;
565 spins[0]=j%2;
566 spins[1]=j/2;
567 spins[2]=i/2;
568 spins[3]=i%2;
569 amp->vertex(spins,Matrix[j/2][j%2][i/2][i%2]);
570 }
571
572 //std::cout << "==================================================" << std::endl;
573 //std::cout << "Lambda_b0: " << parent->getP4Restframe() << std::endl;
574 //std::cout << "Lambda0: " << parent->getDaug(0)->getP4() << std::endl;
575 //std::cout << "mu-: " << parent->getDaug(1)->getP4() << std::endl;
576 //std::cout << "mu+: " << parent->getDaug(2)->getP4() << std::endl;
577 //std::cout << "P_mu: " << P_mu << std::endl;
578 //std::cout << "q_mu: " << q_mu << std::endl;
579 //std::cout << "q2: " << q2 << std::endl;
580 //std::cout << "==================================================" << std::endl;
581
582 return;
583}
584
585EvtTensor4C EvtLb2Lll::EvtLeptonTG5Current(const EvtDiracSpinor &d,const EvtDiracSpinor &dp){
586// <u|sigma^munu*gamma^5|v>
587
588 EvtTensor4C temp;
589 temp.zero();
590 EvtComplex i2(0,0.5);
591
592 static EvtGammaMatrix mat01=EvtGammaMatrix::g0()*
593 (EvtGammaMatrix::g0()*EvtGammaMatrix::g1()-
594 EvtGammaMatrix::g1()*EvtGammaMatrix::g0())*EvtGammaMatrix::g5();
595 static EvtGammaMatrix mat02=EvtGammaMatrix::g0()*
596 (EvtGammaMatrix::g0()*EvtGammaMatrix::g2()-
597 EvtGammaMatrix::g2()*EvtGammaMatrix::g0())*EvtGammaMatrix::g5();
598 static EvtGammaMatrix mat03=EvtGammaMatrix::g0()*
599 (EvtGammaMatrix::g0()*EvtGammaMatrix::g3()-
600 EvtGammaMatrix::g3()*EvtGammaMatrix::g0())*EvtGammaMatrix::g5();
601 static EvtGammaMatrix mat12=EvtGammaMatrix::g0()*
602 (EvtGammaMatrix::g1()*EvtGammaMatrix::g2()-
603 EvtGammaMatrix::g2()*EvtGammaMatrix::g1())*EvtGammaMatrix::g5();
604 static EvtGammaMatrix mat13=EvtGammaMatrix::g0()*
605 (EvtGammaMatrix::g1()*EvtGammaMatrix::g3()-
606 EvtGammaMatrix::g3()*EvtGammaMatrix::g1())*EvtGammaMatrix::g5();
607 static EvtGammaMatrix mat23=EvtGammaMatrix::g0()*
608 (EvtGammaMatrix::g2()*EvtGammaMatrix::g3()-
609 EvtGammaMatrix::g3()*EvtGammaMatrix::g2())*EvtGammaMatrix::g5();
610
611 temp.set(0,1,i2*(d*(mat01*dp)));
612 temp.set(1,0,-temp.get(0,1));
613
614 temp.set(0,2,i2*(d*(mat02*dp)));
615 temp.set(2,0,-temp.get(0,2));
616
617 temp.set(0,3,i2*(d*(mat03*dp)));
618 temp.set(3,0,-temp.get(0,3));
619
620 temp.set(1,2,i2*(d*(mat12*dp)));
621 temp.set(2,1,-temp.get(1,2));
622
623 temp.set(1,3,i2*(d*(mat13*dp)));
624 temp.set(3,1,-temp.get(1,3));
625
626 temp.set(2,3,i2*(d*(mat23*dp)));
627 temp.set(3,2,-temp.get(2,3));
628
629 return temp;
630}