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EvtPhokhara_pipieta.cc
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1//--------------------------------------------------------------------------
2//
3// Environment:
4// This software is part of models developed at BES collaboration
5// based on the EvtGen framework. If you use all or part
6// of it, please give an appropriate acknowledgement.
7//
8// Copyright Information: See EvtGen/BesCopyright
9// Copyright (A) 2006 Ping Rong-Gang @IHEP
10//
11// Module: EvtPhokhara.cc
12// the necessary file: phokharar.F
13// fist.inc,gen.inc mix.inc stdhep.inc
14// Description: Modified Lund model at tau-charm energy level, see
15// PHYSICAL REVIEW D, VOLUME 62, 034003
16// Modification history:
17//
18// Ping R.-G. Jan.25, 2010 Module created
19// The random engine RLU0 is unified with RLU for BesEvtGen
20//------------------------------------------------------------------------
21//
22#include "EvtGenBase/EvtPatches.hh"
23#include "EvtGenBase/EvtPatches.hh"
24#include "EvtGenBase/EvtParticle.hh"
25#include "EvtGenBase/EvtStringParticle.hh"
26#include "EvtGenBase/EvtDecayTable.hh"
27#include "EvtGenBase/EvtPDL.hh"
28#include "EvtGenModels/EvtPhokhara_pipieta.hh"
29#include "EvtGenModels/EvtPhokharaDef.hh"
30#include "EvtGenBase/EvtReport.hh"
31#include <string>
32#include "EvtGenBase/EvtId.hh"
33#include <iostream>
34#include <iomanip>
35#include <fstream>
36#include <string.h>
37#include <stdlib.h>
38#include <unistd.h>
39#include <stdio.h>
40
41#include "GeneratorObject/McGenEvent.h"
42#include "BesKernel/IBesRndmGenSvc.h"
43#include "CLHEP/Random/RandomEngine.h"
44#include "cfortran/cfortran.h"
45
46using namespace std;
47using namespace CLHEP;
48
49using std::endl;
50using std::fstream;
51using std::ios;
52using std::ofstream;
53using std::resetiosflags;
54using std::setiosflags;
55using std::setw;
56
57int EvtPhokhara_pipieta::nevtgen=0;
58int EvtPhokhara_pipieta::nphokharadecays=0;
59EvtDecayBasePtr* EvtPhokhara_pipieta::phokharadecays=0;
60int EvtPhokhara_pipieta::ntable=0;
61
62int EvtPhokhara_pipieta::ncommand=0;
63int EvtPhokhara_pipieta::lcommand=0;
64std::string* EvtPhokhara_pipieta::commands=0;
65int EvtPhokhara_pipieta::nevt=0;
66
67EvtPhokhara_pipieta::EvtPhokhara_pipieta(){}
68EvtPhokhara_pipieta::~EvtPhokhara_pipieta(){
69 int i;
70 //the deletion of commands is really uggly!
71
72 if (nphokharadecays==0) {
73 delete [] commands;
74 commands=0;
75 return;
76 }
77
78 for(i=0;i<nphokharadecays;i++){
79 if (phokharadecays[i]==this){
80 phokharadecays[i]=phokharadecays[nphokharadecays-1];
81 nphokharadecays--;
82 if (nphokharadecays==0) {
83 delete [] commands;
84 commands=0;
85 }
86 return;
87 }
88 }
89
90 report(ERROR,"EvtGen") << "Error in destroying Phokhara model!"<<endl;
91
92}
93
94
95void EvtPhokhara_pipieta::getName(std::string& model_name){
96
97 model_name="PHOKHARA_pipieta";
98
99}
100
101EvtDecayBase* EvtPhokhara_pipieta::clone(){
102
103 return new EvtPhokhara_pipieta;
104
105}
106
107
108void EvtPhokhara_pipieta::initProbMax(){
109
110 noProbMax();
111
112}
113
114
115void EvtPhokhara_pipieta::init_mode(EvtParticle* p){
116 m_pion=10;
117 // mu+mu-(0),pi+pi-(1),2pi0pi+pi-(2),
118 // 2pi+2pi-(3),ppbar(4),nnbar(5),
119 // K+K-(6),K0K0bar(7),pi+pi-pi0(8),
120 // Lamb Lambbar->pi-pi+ppbar(9)
121#include "Phokhara_init_mode.txt"
122}
123
124
125
126void EvtPhokhara_pipieta::init(){
127 checkNArg(0);
128
129 std::string locvp=getenv("BESEVTGENROOT");
130 system("cat $BESEVTGENROOT/share/phokhara_9.1.param>phokhara_9.1.param");
131 system("cat $BESEVTGENROOT/share/phokhara_9.1.fferr>phokhara_9.1.fferr");
132 system("cat $BESEVTGENROOT/share/phokhara_9.1.ffwarn>phokhara_9.1.ffwarn");
133
134
135 if (getParentId().isAlias()){
136
137 report(ERROR,"EvtGen") << "EvtPhokhara finds that you are decaying the"<<endl
138 << " aliased particle "
139 << EvtPDL::name(getParentId()).c_str()
140 << " with the Phokhara model"<<endl
141 << " this does not work, please modify decay table."
142 << endl;
143 report(ERROR,"EvtGen") << "Will terminate execution!"<<endl;
144 ::abort();
145
146 }
147
148 store(this);
149
150}
151
152
153std::string EvtPhokhara_pipieta::commandName(){
154
155 return std::string("PhokharaPar");
156
157}
158
159void EvtPhokhara_pipieta::command(std::string cmd){
160
161 if (ncommand==lcommand){
162
163 lcommand=10+2*lcommand;
164
165 std::string* newcommands=new std::string[lcommand];
166
167 int i;
168
169 for(i=0;i<ncommand;i++){
170 newcommands[i]=commands[i];
171 }
172
173 delete [] commands;
174
175 commands=newcommands;
176
177 }
178
179 commands[ncommand]=cmd;
180
181 ncommand++;
182
183}
184
185
186
187void EvtPhokhara_pipieta::decay( EvtParticle *p){
188 EvtId myvpho=EvtPDL::getId("vpho");
189 if(p->getId()!=myvpho) {std::cout<<"Parent particle is required to be vpho for Phokhara model"<<std::endl;abort();}
190 if(nevtgen==0) {init_mode(p);}
191 else{init_evt(p);}
192 std::cout<<"PHOKHARA : pi+pi-eta mode "<<std::endl;
193
194
195 int istdheppar=EvtPDL::getStdHep(p->getId());
196 int ntrials = 0;
197 int tr_old[3];
198 tr_old[0] = (int)maxima_.tr[0];
199 tr_old[1] = (int)maxima_.tr[1];
200 tr_old[2] = (int)maxima_.tr[2];
201
202 while( ntrials < 1000000)
203 {
204 ievent++;
205 RANLXDF(Ar_r,1);
206 Ar[1] = Ar_r[0];
207
208 if (Ar[1] <= (maxima_.Mmax[0]/(maxima_.Mmax[0]+maxima_.Mmax[1]+maxima_.Mmax[2]))) {
209 maxima_.count[0] = maxima_.count[0]+1.0;
210 GEN_0PH(2,qqmin,ctes_.Sp,cos3min,cos3max);
211 }else
212 if (Ar[1] <= ( (maxima_.Mmax[0]+maxima_.Mmax[1])/(maxima_.Mmax[0]+maxima_.Mmax[1]+maxima_.Mmax[2]))) {
213 maxima_.count[1] = maxima_.count[1]+1.0;
214 GEN_1PH(2,qqmin,qqmax,cos1min,cos1max,cos3min,cos3max);
215 }
216 else {
217 maxima_.count[2] = maxima_.count[2]+1.0;
218 GEN_2PH(2,qqmin,cos1min,cos1max,cos2min,cos2max,cos3min,cos3max);
219 }
220
221 if( ((int)maxima_.tr[0]+(int)maxima_.tr[1]+(int)maxima_.tr[2]) > (tr_old[0]+tr_old[1]+tr_old[2]) ) // event accepted after cuts
222 {
223 goto storedEvents;
224 }
225 ntrials ++;
226 }
227 std::cout <<"FATAL: Could not satisfy cuts after " << ntrials << "trials. Terminate." <<std::endl;
228 //----
229 storedEvents:
230 int more=0;
231 int numstable=0;
232 int numparton=0;
233 EvtId evtnumstable[100];//
234 EvtVector4R p4[20];
235
236 // except ISR photos, products depending on channel
237 if (flags_.pion == 0) { // mu+ mu-
238 // mu+
239 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-13);
240 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
241 numstable++;
242 // mu -
243 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(13);
244 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
245 numstable++;
246 }
247 if (flags_.pion == 1) { // pi+ pi-
248 // pi+
249 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(211);
250 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
251 numstable++;
252 // pi -
253 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-211);
254 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
255 numstable++;
256 }
257 if (flags_.pion == 2) { // pi+ pi-2pi0
258 // pi0
259 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(111);
260 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
261 numstable++;
262 // pi0
263 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(111);
264 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
265 numstable++;
266 // pi-
267 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-211);
268 p4[numstable].set(ctes_.momenta[0][7],ctes_.momenta[1][7], ctes_.momenta[2][7], ctes_.momenta[3][7]);
269 numstable++;
270 // pi +
271 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(211);
272 p4[numstable].set(ctes_.momenta[0][8],ctes_.momenta[1][8], ctes_.momenta[2][8], ctes_.momenta[3][8]);
273 numstable++;
274 }
275 if (flags_.pion == 3) { // 2(pi+ pi-)
276 // pi+
277 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(211);
278 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
279 numstable++;
280 // pi-
281 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-211);
282 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
283 numstable++;
284 // pi+
285 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-211);
286 p4[numstable].set(ctes_.momenta[0][7],ctes_.momenta[1][7], ctes_.momenta[2][7], ctes_.momenta[3][7]);
287 numstable++;
288 // pi -
289 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(211);
290 p4[numstable].set(ctes_.momenta[0][8],ctes_.momenta[1][8], ctes_.momenta[2][8], ctes_.momenta[3][8]);
291 numstable++;
292 }
293 if (flags_.pion == 4) { // ppbar
294 // pbar
295 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-2212);
296 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
297 numstable++;
298 // p
299 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(2212);
300 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
301 numstable++;
302 }
303 if (flags_.pion == 5) { // nnbar
304 // pbar
305 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-2112);
306 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
307 numstable++;
308 // p
309 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(2112);
310 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
311 numstable++;
312 }
313 if (flags_.pion == 6) { // K+ K-
314 // K+
315 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(321);
316 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
317 numstable++;
318 // K -
319 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-321);
320 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
321 numstable++;
322 }
323 if (flags_.pion == 7) { // K0K0bar
324 // Kbar
325 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(311);
326 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
327 numstable++;
328 // K0
329 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-311);
330 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
331 numstable++;
332 }
333 if (flags_.pion == 8) { // pi+ pi-pi0
334 // pi+
335 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(211);
336 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
337 numstable++;
338 // pi-
339 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-211);
340 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
341 numstable++;
342 // pi0
343 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(111);
344 p4[numstable].set(ctes_.momenta[0][7],ctes_.momenta[1][7], ctes_.momenta[2][7], ctes_.momenta[3][7]);
345 numstable++;
346 }
347 if (flags_.pion == 9) { //Lambda Lambdabar-> pi+ pi- ppbar
348 // pi+
349 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(211);
350 p4[numstable].set(ctes_.momenta[0][7],ctes_.momenta[1][7], ctes_.momenta[2][7], ctes_.momenta[3][7]);
351 numstable++;
352 // pbar
353 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-2212);
354 p4[numstable].set(ctes_.momenta[0][8],ctes_.momenta[1][8], ctes_.momenta[2][8], ctes_.momenta[3][8]);
355 numstable++;
356 // pi-
357 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-211);
358 p4[numstable].set(ctes_.momenta[0][9],ctes_.momenta[1][9], ctes_.momenta[2][9], ctes_.momenta[3][9]);
359 numstable++;
360 // p
361 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(2212);
362 p4[numstable].set(ctes_.momenta[0][10],ctes_.momenta[1][10], ctes_.momenta[2][10], ctes_.momenta[3][10]);
363 numstable++;
364 }
365 if (flags_.pion == 10) { // pi+ pi-eta
366 // pi+
367 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(211);
368 p4[numstable].set(ctes_.momenta[0][5],ctes_.momenta[1][5], ctes_.momenta[2][5], ctes_.momenta[3][5]);
369 numstable++;
370 // pi-
371 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(-211);
372 p4[numstable].set(ctes_.momenta[0][6],ctes_.momenta[1][6], ctes_.momenta[2][6], ctes_.momenta[3][6]);
373 numstable++;
374 // eta
375 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(221);
376 p4[numstable].set(ctes_.momenta[0][7],ctes_.momenta[1][7], ctes_.momenta[2][7], ctes_.momenta[3][7]);
377 numstable++;
378 }
379
380 // ISR gamma
381 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(22);
382 p4[numstable].set(ctes_.momenta[0][2],ctes_.momenta[1][2], ctes_.momenta[2][2], ctes_.momenta[3][2]);
383 numstable++;
384 if( ctes_.momenta[0][3] != 0 ) // second photon exists
385 {
386 evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(22);
387 p4[numstable].set(ctes_.momenta[0][3],ctes_.momenta[1][3], ctes_.momenta[2][3], ctes_.momenta[3][3]);
388 numstable++;
389 }
390
391 int channel=EvtDecayTable::inChannelList(p->getId(),numstable,evtnumstable);
392 more=(channel!=-1);
393 if(more) {std::cout<<"Existence of mode "<<channel<<" in exclusive decay list has the same final state as this one"<<std::endl;abort(); }
394
395 p->makeDaughters(numstable,evtnumstable);
396 //double weight = p->initializePhaseSpace(getNDaug(),getDaugs());
397
398 int ndaugFound=0;
399 EvtVector4R SUMP4(0,0,0,0);
400 for(int i=0;i<numstable;i++){
401 p->getDaug(i)->init(evtnumstable[i],p4[i]);
402 ndaugFound++;
403 }
404 if ( ndaugFound == 0 ) {
405 report(ERROR,"EvtGen") << "Phokhara has failed to do a decay ";
406 report(ERROR,"EvtGen") << EvtPDL::name(p->getId()).c_str() << " " << p->mass()<<endl;
407 assert(0);
408 }
409
410 nevtgen++;
411 return ;
412
413}
414
415
416
417void EvtPhokhara_pipieta::store(EvtDecayBase* jsdecay){
418
419 if (nphokharadecays==ntable){
420
421 EvtDecayBasePtr* newphokharadecays=new EvtDecayBasePtr[2*ntable+10];
422 int i;
423 for(i=0;i<ntable;i++){
424 newphokharadecays[i]=phokharadecays[i];
425 }
426 ntable=2*ntable+10;
427 delete [] phokharadecays;
428 phokharadecays=newphokharadecays;
429 }
430
431 phokharadecays[nphokharadecays++]=jsdecay;
432
433
434
435}
436
437
438void EvtPhokhara_pipieta::PhokharaInit(int dummy){
439 static int first=1;
440 if (first){
441
442 first=0;
443 //for(int i=0;i<ncommand;i++)
444 // lugive0_(commands[i].c_str(),strlen(commands[i].c_str()));
445 }
446
447}
448
449
450
451void EvtPhokhara_pipieta::init_evt(EvtParticle* p){
452 m_pion=10;
453 // mu+mu-(0),pi+pi-(1),2pi0pi+pi-(2),
454 // 2pi+2pi-(3),ppbar(4),nnbar(5),
455 // K+K-(6),K0K0bar(7),pi+pi-pi0(8),
456 // Lamb Lambbar->pi-pi+ppbar(9)
457#include "Phokhara_init_evt.txt"
458}
459
460
flags_
struct @17 flags_
GEN_1PH
#define GEN_1PH(I, QQMIN, QQMAX, COS1MIN, COS1MAX, COS3MIN, COS3MAX)
Definition: EvtPhokharaDef.hh:100
RANLXDF
#define RANLXDF(AR, VAL)
Definition: EvtPhokharaDef.hh:97
GEN_0PH
#define GEN_0PH(I, QQMIN, SP, COS3MIN, COS3MAX)
Definition: EvtPhokharaDef.hh:106
maxima_
struct @16 maxima_
ctes_
struct @10 ctes_
GEN_2PH
#define GEN_2PH(I, QQMIN, COS1MIN, COS1MAX, COS2MIN, COS2MAX, COS3MIN, COS3MAX)
Definition: EvtPhokharaDef.hh:103
EvtPhokhara_pipieta.hh
report
ostream & report(Severity severity, const char *facility)
Definition: EvtReport.cc:36
ERROR
@ ERROR
Definition: EvtReport.hh:49
EvtDecayBase::noProbMax
void noProbMax()
Definition: EvtDecayBase.cc:304
EvtDecayBase::getParentId
EvtId getParentId()
Definition: EvtDecayBase.hh:60
EvtDecayBase::checkNArg
void checkNArg(int a1, int a2=-1, int a3=-1, int a4=-1)
Definition: EvtDecayBase.cc:482
EvtDecayTable::inChannelList
static int inChannelList(EvtId parent, int ndaug, EvtId *daugs)
Definition: EvtDecayTable.cc:795
EvtId
Definition: EvtId.hh:27
EvtPDL::getStdHep
static int getStdHep(EvtId id)
Definition: EvtPDL.hh:56
EvtPDL::evtIdFromStdHep
static EvtId evtIdFromStdHep(int stdhep)
Definition: EvtPDL.cc:244
EvtPDL::name
static std::string name(EvtId i)
Definition: EvtPDL.hh:64
EvtPDL::getId
static EvtId getId(const std::string &name)
Definition: EvtPDL.cc:287
EvtParticle::makeDaughters
void makeDaughters(int ndaug, EvtId *id)
Definition: EvtParticle.cc:1177
EvtParticle::init
virtual void init(EvtId part_n, const EvtVector4R &p4)=0
EvtParticle::getId
EvtId getId() const
Definition: EvtParticle.cc:113
EvtParticle::getDaug
EvtParticle * getDaug(int i)
Definition: EvtParticle.cc:85
EvtParticle::mass
double mass() const
Definition: EvtParticle.cc:127
EvtPhokhara_pipieta::init_mode
void init_mode(EvtParticle *p)
Definition: EvtPhokhara_pipieta.cc:115
EvtPhokhara_pipieta::initProbMax
void initProbMax()
Definition: EvtPhokhara_pipieta.cc:108
EvtPhokhara_pipieta::getName
void getName(std::string &name)
Definition: EvtPhokhara_pipieta.cc:95
EvtPhokhara_pipieta::decay
void decay(EvtParticle *p)
Definition: EvtPhokhara_pipieta.cc:187
EvtPhokhara_pipieta::init
void init()
Definition: EvtPhokhara_pipieta.cc:126
EvtPhokhara_pipieta::commandName
std::string commandName()
Definition: EvtPhokhara_pipieta.cc:153
EvtPhokhara_pipieta::command
void command(std::string cmd)
Definition: EvtPhokhara_pipieta.cc:159
EvtPhokhara_pipieta::PhokharaInit
void PhokharaInit(int dummy)
Definition: EvtPhokhara_pipieta.cc:438
EvtPhokhara_pipieta::~EvtPhokhara_pipieta
virtual ~EvtPhokhara_pipieta()
Definition: EvtPhokhara_pipieta.cc:68
EvtPhokhara_pipieta::clone
EvtDecayBase * clone()
Definition: EvtPhokhara_pipieta.cc:101
EvtPhokhara_pipieta::EvtPhokhara_pipieta
EvtPhokhara_pipieta()
Definition: EvtPhokhara_pipieta.cc:67
EvtPhokhara_pipieta::init_evt
void init_evt(EvtParticle *p)
Definition: EvtPhokhara_pipieta.cc:451
EvtVector4R::set
void set(int i, double d)
Definition: EvtVector4R.hh:183