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Commit | Line | Data |
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3fa37a65 | 1 | //expanding localy equilibated fireball with volume hadron radiation |
2 | //thermal part: Blast wave model, Bjorken-like parametrization | |
3 | //hyght-pt: PYTHIA + jet quenching model PYQUEN | |
4 | ||
b1c2e580 | 5 | /* |
6 | HYDJET++ | |
7 | version 1.0: | |
8 | InitialStateHydjet is the modified InitialStateBjorken | |
9 | The high-pt part related with PYTHIA-PYQUEN is included | |
10 | InitialStateBjorken (FASTMC) was used. | |
11 | ||
12 | ||
13 | ||
14 | InitialStateBjorken | |
15 | version 2.0: | |
16 | Ludmila Malinina malinina@lav01.sinp.msu.ru, SINP MSU/Moscow and JINR/Dubna | |
17 | Ionut Arsene i.c.arsene@fys.uio.no, Oslo University | |
18 | June 2007 | |
19 | ||
20 | version 1.0: | |
21 | Nikolai Amelin, Ludmila Malinina, Timur Pocheptsov (C) JINR/Dubna | |
22 | amelin@sunhe.jinr.ru, malinina@sunhe.jinr.ru, pocheptsov@sunhe.jinr.ru | |
23 | November. 2, 2005 | |
24 | ||
25 | ||
26 | */ | |
27 | ||
b1c2e580 | 28 | #include <TLorentzVector.h> |
29 | #include <TVector3.h> | |
b1c2e580 | 30 | #include <TMath.h> |
31 | ||
3fa37a65 | 32 | #ifndef INITIALSTATEHYDJET_H |
b1c2e580 | 33 | #include "InitialStateHydjet.h" |
34 | #endif | |
35 | #ifndef RANDARRAYFUNCTION_INCLUDED | |
36 | #include "RandArrayFunction.h" | |
37 | #endif | |
b1c2e580 | 38 | #ifndef GRANDCANONICAL_INCLUDED |
39 | #include "GrandCanonical.h" | |
40 | #endif | |
41 | #ifndef NAStrangePotential_h | |
42 | #include "StrangePotential.h" | |
43 | #endif | |
b1c2e580 | 44 | #ifndef PARTICLE_INCLUDED |
45 | #include "Particle.h" | |
46 | #endif | |
47 | #ifndef PARTICLE_PDG | |
48 | #include "ParticlePDG.h" | |
49 | #endif | |
b1c2e580 | 50 | #include <iostream> |
51 | #include <fstream> | |
52 | #include "HYJET_COMMONS.h" | |
53 | extern "C" void hyevnt_(); | |
54 | extern "C" void myini_(); | |
b1c2e580 | 55 | extern HYIPARCommon HYIPAR; |
56 | extern HYFPARCommon HYFPAR; | |
57 | extern HYJPARCommon HYJPAR; | |
58 | extern HYPARTCommon HYPART; | |
59 | extern SERVICECommon SERVICE; | |
60 | ||
61 | using std::cout; | |
62 | using std::endl; | |
63 | ||
3fa37a65 | 64 | class ParticleAllocator; |
65 | class TRandom3; | |
66 | ||
67 | // declaration of the static member fLastIndex | |
68 | Int_t Particle::fLastIndex; | |
69 | ||
b1c2e580 | 70 | void InitialStateHydjet::Initialize(List_t &source, ParticleAllocator & allocator) { |
7b7936e9 | 71 | // Generate initial particles from the soft and hard components |
3fa37a65 | 72 | |
73 | // Initialize the static "last index variable" | |
74 | Particle::InitIndexing(); | |
75 | ||
b1c2e580 | 76 | //----- high-pt part------------------------------ |
b1c2e580 | 77 | TLorentzVector partJMom, partJPos, zeroVec; |
b1c2e580 | 78 | |
7b7936e9 | 79 | // run a HYDJET event |
80 | hyevnt_(); | |
7b7936e9 | 81 | |
b1c2e580 | 82 | if(fParams.fNhsel != 0) { |
3fa37a65 | 83 | //get number of particles in jets |
b1c2e580 | 84 | Int_t numbJetPart = HYPART.njp; |
3fa37a65 | 85 | |
86 | for(Int_t i = 0; i <numbJetPart; i++) { | |
87 | Int_t pdg = Int_t(HYPART.ppart[i][1]); | |
b1c2e580 | 88 | Double_t px = HYPART.ppart[i][2]; |
89 | Double_t py = HYPART.ppart[i][3]; | |
90 | Double_t pz = HYPART.ppart[i][4]; | |
91 | Double_t e = HYPART.ppart[i][5]; | |
92 | Double_t vx = HYPART.ppart[i][6]; | |
93 | Double_t vy = HYPART.ppart[i][7]; | |
94 | Double_t vz = HYPART.ppart[i][8]; | |
95 | Double_t vt = HYPART.ppart[i][9]; | |
b1c2e580 | 96 | ParticlePDG *partDef = fDatabase->GetPDGParticle(pdg); |
97 | Int_t type =1; //from jet | |
3fa37a65 | 98 | if(partDef) { |
99 | partJMom.SetXYZT(px, py, pz, e); | |
100 | partJPos.SetXYZT(vx, vy, vz, vt); | |
101 | Particle *particle=new Particle(partDef, partJPos, partJMom, 0, 0, type, -1, zeroVec, zeroVec); | |
102 | particle->SetIndex(); | |
103 | allocator.AddParticle(*particle, source); | |
104 | delete particle; | |
105 | } | |
b1c2e580 | 106 | } |
7b7936e9 | 107 | } //nhsel !=0 not only hydro! |
b1c2e580 | 108 | |
b1c2e580 | 109 | |
110 | //----------HYDRO part------------------------------------------------ | |
111 | if(fParams.fNhsel < 3) { | |
112 | const Double_t weightMax = 2*TMath::CosH(fParams.fUmax); | |
113 | const Int_t nBins = 100; | |
114 | Double_t probList[nBins]; | |
115 | RandArrayFunction arrayFunctDistE(nBins); | |
116 | RandArrayFunction arrayFunctDistR(nBins); | |
117 | ||
118 | TLorentzVector partPos, partMom, n1, p0; | |
119 | TVector3 vec3; | |
b1c2e580 | 120 | //set maximal hadron energy |
121 | const Double_t eMax = 5.; | |
122 | //------------------------------------- | |
123 | // get impact parameter | |
b1c2e580 | 124 | |
125 | //effective volume for central | |
126 | double dYl= 2 * fParams.fYlmax; //uniform distr. [-Ylmax; Ylmax] | |
127 | if(fParams.fEtaType >0) dYl = TMath::Sqrt(2 * TMath::Pi()) * fParams.fYlmax ; //Gaussian distr. | |
3eeebf49 | 128 | Double_t volEffcent = 2 * TMath::Pi() * fParams.fTau * dYl * |
129 | (fParams.fR * fParams.fR)/TMath::Power((fParams.fUmax),2)* | |
130 | ((fParams.fUmax)*TMath::SinH((fParams.fUmax))-TMath::CosH((fParams.fUmax))+ 1); | |
b1c2e580 | 131 | |
132 | //effective volume for non-central Simpson2 | |
7b7936e9 | 133 | Double_t volEffnoncent = fParams.fTau * dYl * SimpsonIntegrator2(0., 2.*TMath::Pi()); |
134 | fVolEff = volEffcent * HYFPAR.npart/HYFPAR.npart0; | |
b1c2e580 | 135 | |
7b7936e9 | 136 | Double_t coeffRB = TMath::Sqrt(volEffcent * HYFPAR.npart/HYFPAR.npart0/volEffnoncent); |
137 | Double_t coeffR1 = HYFPAR.npart/HYFPAR.npart0; | |
138 | coeffR1 = TMath::Power(coeffR1, 0.333333); | |
b1c2e580 | 139 | |
7b7936e9 | 140 | double veff=fVolEff; |
b1c2e580 | 141 | |
b1c2e580 | 142 | //------------------------------------ |
143 | //cycle on particles types | |
144 | for(Int_t i = 0; i < fParams.fNPartTypes; ++i) { | |
7b7936e9 | 145 | Double_t mparam = fParams.fPartMult[2 * i] * veff; |
146 | Int_t multiplicity = gRandom->Poisson(mparam); | |
b1c2e580 | 147 | const Int_t encoding = fParams.fPartEnc[i]; |
148 | ||
149 | if(multiplicity > 0) { | |
150 | ParticlePDG *partDef = fDatabase->GetPDGParticle(encoding); | |
151 | if(!partDef) { | |
152 | Error("InitialStateHydjet::Initialize", "No particle with encoding %d", encoding); | |
153 | continue; | |
154 | } | |
155 | //no charm now ! | |
156 | if(partDef->GetCharmQNumber()!=0 || partDef->GetCharmAQNumber()!=0){ | |
b1c2e580 | 157 | continue; |
158 | } | |
159 | ||
160 | //compute chemical potential for single f.o. mu==mu_ch | |
161 | //compute chemical potential for thermal f.o. | |
162 | Double_t mu = fParams.fPartMu[2 * i]; | |
163 | ||
164 | //choose Bose-Einstein or Fermi-Dirac statistics | |
165 | const Double_t d = !(Int_t(2*partDef->GetSpin()) & 1) ? -1 : 1; | |
166 | const Double_t mass = partDef->GetMass(); | |
167 | ||
168 | //prepare histogram to sample hadron energy: | |
169 | Double_t h = (eMax - mass) / nBins; | |
170 | Double_t x = mass + 0.5 * h; | |
7b7936e9 | 171 | Int_t ii; |
172 | for(ii = 0; ii < nBins; ++ii) { | |
173 | if(x>=mu && fParams.fThFO>0)probList[ii] = x * TMath::Sqrt(x * x - mass * mass) / | |
b1c2e580 | 174 | (TMath::Exp((x - mu) / (fParams.fThFO)) + d); |
7b7936e9 | 175 | if(x>=mu && fParams.fThFO<=0)probList[ii] = x * TMath::Sqrt(x * x - mass * mass) / |
b1c2e580 | 176 | (TMath::Exp((x - mu) / (fParams.fT)) + d); |
7b7936e9 | 177 | if(x<mu)probList[ii] = 0.; |
b1c2e580 | 178 | x += h; |
179 | } | |
180 | arrayFunctDistE.PrepareTable(probList); | |
181 | ||
182 | //prepare histogram to sample hadron transverse radius: | |
183 | h = (fParams.fR) / nBins; | |
184 | x = 0.5 * h; | |
185 | Double_t param = (fParams.fUmax) / (fParams.fR); | |
7b7936e9 | 186 | for(ii = 0; ii < nBins; ++ii) { |
187 | probList[ii] = x * TMath::CosH(param*x); | |
b1c2e580 | 188 | x += h; |
189 | } | |
190 | arrayFunctDistR.PrepareTable(probList); | |
191 | ||
192 | //loop over hadrons, assign hadron coordinates and momenta | |
193 | Double_t weight = 0., yy = 0., px0 = 0., py0 = 0., pz0 = 0.; | |
194 | Double_t e = 0., x0 = 0., y0 = 0., z0 = 0., t0 = 0., etaF = 0.; | |
7b7936e9 | 195 | Double_t r, rB, phiF; |
b1c2e580 | 196 | |
197 | for(Int_t j = 0; j < multiplicity; ++j) { | |
198 | do { | |
199 | fParams.fEtaType <=0 ? etaF = fParams.fYlmax * (2. * gRandom->Rndm() - 1.) | |
200 | : etaF = (fParams.fYlmax) * (gRandom->Gaus()); | |
201 | n1.SetXYZT(0.,0.,TMath::SinH(etaF),TMath::CosH(etaF)); | |
202 | if(TMath::Abs(etaF)>5.)continue; | |
203 | ||
7b7936e9 | 204 | rB = fParams.fR * coeffRB * coeffR1; |
b1c2e580 | 205 | |
206 | Double_t rho = TMath::Sqrt(gRandom->Rndm()); | |
207 | Double_t phi = TMath::TwoPi() * gRandom->Rndm(); | |
7b7936e9 | 208 | Double_t rx = TMath::Sqrt(1-fParams.fEpsilon)*rB; |
209 | Double_t ry = TMath::Sqrt(1+fParams.fEpsilon)*rB; | |
b1c2e580 | 210 | |
7b7936e9 | 211 | x0 = rx * rho * TMath::Cos(phi); |
212 | y0 = ry * rho * TMath::Sin(phi); | |
b1c2e580 | 213 | r = TMath::Sqrt(x0*x0+y0*y0); |
214 | phiF = TMath::Abs(TMath::ATan(y0/x0)); | |
215 | ||
216 | if(x0<0&&y0>0)phiF = TMath::Pi()-phiF; | |
217 | if(x0<0&&y0<0)phiF = TMath::Pi()+phiF; | |
218 | if(x0>0&&y0<0)phiF = 2.*TMath::Pi()-phiF; | |
219 | ||
220 | //proper time with emission duration | |
7b7936e9 | 221 | Double_t tau = coeffR1 * fParams.fTau + sqrt(2.) * fParams.fSigmaTau * coeffR1 * (gRandom->Gaus()); |
b1c2e580 | 222 | z0 = tau * TMath::SinH(etaF); |
223 | t0 = tau * TMath::CosH(etaF); | |
224 | ||
7b7936e9 | 225 | Double_t rhou = fParams.fUmax * r / rB; |
b1c2e580 | 226 | |
b1c2e580 | 227 | |
228 | Double_t uxf = TMath::SinH(rhou)*TMath::Sqrt(1+fParams.fDelta)*TMath::Cos(phiF); | |
229 | Double_t uyf = TMath::SinH(rhou)*TMath::Sqrt(1-fParams.fDelta)*TMath::Sin(phiF); | |
230 | Double_t utf = TMath::CosH(etaF) * TMath::CosH(rhou) * | |
231 | TMath::Sqrt(1+fParams.fDelta*TMath::Cos(2*phiF)*TMath::TanH(rhou)*TMath::TanH(rhou)); | |
232 | Double_t uzf = TMath::SinH(etaF) * TMath::CosH(rhou) * | |
233 | TMath::Sqrt(1+fParams.fDelta*TMath::Cos(2*phiF)*TMath::TanH(rhou)*TMath::TanH(rhou)); | |
234 | ||
235 | vec3.SetXYZ(uxf / utf, uyf / utf, uzf / utf); | |
236 | n1.Boost(-vec3); | |
237 | ||
238 | yy = weightMax * gRandom->Rndm(); | |
239 | ||
240 | Double_t php0 = TMath::TwoPi() * gRandom->Rndm(); | |
241 | Double_t ctp0 = 2. * gRandom->Rndm() - 1.; | |
242 | Double_t stp0 = TMath::Sqrt(1. - ctp0 * ctp0); | |
243 | e = mass + (eMax - mass) * arrayFunctDistE(); | |
244 | Double_t pp0 = TMath::Sqrt(e * e - mass * mass); | |
245 | px0 = pp0 * stp0 * TMath::Sin(php0); | |
246 | py0 = pp0 * stp0 * TMath::Cos(php0); | |
247 | pz0 = pp0 * ctp0; | |
248 | p0.SetXYZT(px0, py0, pz0, e); | |
249 | ||
250 | //weight for rdr | |
251 | weight = (n1 * p0) /e; // weight for rdr gammar: weight = (n1 * p0) / n1[3] / e; | |
252 | } while(yy >= weight); | |
253 | ||
b1c2e580 | 254 | partMom.SetXYZT(px0, py0, pz0, e); |
255 | partPos.SetXYZT(x0, y0, z0, t0); | |
256 | partMom.Boost(vec3); | |
257 | Int_t type =0; //hydro | |
7b7936e9 | 258 | |
3fa37a65 | 259 | Particle *particle=new Particle(partDef, partPos, partMom, 0., 0, type, -1, zeroVec, zeroVec); |
260 | particle->SetIndex(); | |
261 | allocator.AddParticle(*particle, source); | |
262 | delete particle; | |
b1c2e580 | 263 | } //nhsel==4 , no hydro part |
264 | } | |
265 | } | |
266 | } | |
267 | ||
b1c2e580 | 268 | } |
269 | ||
270 | Bool_t InitialStateHydjet::ReadParams() { | |
7b7936e9 | 271 | // Read parameters from an input file in ascii |
272 | ||
b1c2e580 | 273 | Float_t par[200] = {0.}; |
274 | Int_t i = 0; | |
275 | std::string s(40,' '); | |
276 | std::ifstream input("RunInputHydjet"); | |
277 | if (!input) { | |
278 | Error("Ukm::ReadParams", "Cannot open RunInputHydjet"); | |
279 | return kFALSE; | |
280 | } | |
281 | ||
282 | while (std::getline(input, s)) { | |
283 | input>>par[i]; | |
284 | if (i < 140) | |
285 | std::cout<<s<<" = "<<par[i]<<std::endl; | |
286 | ++i; | |
287 | std::getline(input,s); | |
288 | } | |
289 | ||
290 | std::cout<<"\nFor output use the files RunOutput.root \n\n"<< std::endl; | |
291 | ||
292 | fParams.fNevnt = Int_t(par[0]); //number of events | |
293 | fParams.fSqrtS = par[1]; //cms energy per nucleon | |
294 | fParams.fAw = par[2]; // atomic number of colliding nuclei | |
295 | fParams.fIfb = Int_t(par[3]); // flag of type of centrality generation (=0 is fixed by fBfix, not 0 | |
296 | //impact parameter is generated in each event between fBfmin | |
297 | //and fBmax according with Glauber model (f-la 30) | |
298 | fParams.fBmin = par[4]; //minimum impact parameter in units of nuclear radius RA | |
299 | fParams.fBmax = par[5]; //maximum impact parameter in units of nuclear radius RA | |
300 | fParams.fBfix = par[6]; //fix impact parameter in units of nuclear radius RA | |
301 | ||
302 | fParams.fSeed = Int_t(par[7]); //parameter to set the random nuber seed (=0 the current time is used | |
303 | //to set the random generator seed, !=0 the value fSeed is | |
304 | //used to set the random generator seed and then the state of random | |
305 | //number generator in PYTHIA MRPY(1)=fSeed | |
306 | ||
307 | fParams.fT = par[8]; //chemical freeze-out temperature in GeV | |
308 | fParams.fMuB = par[9]; //baryon potential | |
309 | fParams.fMuS = par[10]; //strangeness potential | |
310 | fParams.fMuI3 = par[11]; //isospin potential | |
311 | fParams.fThFO = par[12]; //thermal freeze-out temperature T^th in GeV | |
312 | fParams.fMu_th_pip = par[13]; // effective chemical potential of positivly charged pions at thermal in GeV | |
313 | ||
314 | ||
315 | fParams.fTau = par[14]; //proper time value | |
316 | fParams.fSigmaTau = par[15]; //its standart deviation (emission duration) | |
317 | fParams.fR = par[16]; //maximal transverse radius | |
318 | fParams.fYlmax = par[17]; //maximal longitudinal rapidity | |
319 | fParams.fUmax = par[18]; //maximal transverse velocity multiplaed on \gamma_r | |
320 | fParams.fDelta = par[19]; //momentum asymmetry parameter | |
321 | fParams.fEpsilon = par[20]; //coordinate asymmetry parameter | |
322 | ||
323 | fParams.fDecay = Int_t(par[21]); // flag to switch on/off hadron decays<0: decays off,>=0: decays on, (default: 0) | |
324 | fParams.fWeakDecay = Int_t(par[22]); //flag to switch on/off weak hadron decays <0: decays off, >0: decays on, (default: 0) | |
325 | ||
326 | fParams.fEtaType = Int_t(par[23]); // flag to choose rapidity distribution, if fEtaType<=0, | |
327 | //then uniform rapidity distribution in [-fYlmax,fYlmax] if fEtaType>0, | |
328 | //then Gaussian with dispertion = fYlmax | |
329 | ||
330 | fParams.fTMuType = Int_t(par[24]); // flag to use calculated chemical freeze-out temperature, | |
331 | //baryon potential and strangeness potential as a function of fSqrtS | |
332 | ||
333 | fParams.fCorrS = par[25]; // flag and value to include strangeness supression factor | |
334 | fParams.fNhsel = Int_t(par[26]); //flag to switch on/off jet and hydro-state production (0: jet | |
335 | // production off and hydro on, 1: jet production on and jet quenching | |
336 | // off and hydro on, 2: jet production on and jet quenching on and | |
337 | // hydro on, 3: jet production on and jet quenching off and hydro | |
338 | // off, 4: jet production on and jet quenching on and hydro off | |
339 | ||
340 | fParams.fIshad= Int_t(par[27]); //flag to switch on/off impact parameter dependent nuclear | |
341 | // shadowing for gluons and light sea quarks (u,d,s) (0: shadowing off, | |
342 | // 1: shadowing on for fAw=207, 197, 110, 40, default: 1 | |
343 | ||
344 | fParams.fPtmin = par[28]; //minimal transverse momentum transfer p_T of hard | |
345 | // parton-parton scatterings in GeV (the PYTHIA parameter ckin(3)=fPtmin) | |
346 | ||
347 | // PYQUEN energy loss model parameters: | |
348 | ||
349 | fParams.fT0 = par[29]; // initial temperature (in GeV) of QGP for | |
350 | //central Pb+Pb collisions at mid-rapidity (initial temperature for other | |
351 | //centralities and atomic numbers will be calculated automatically) (allowed range is 0.2<fT0<2) | |
352 | ||
353 | fParams.fTau0= par[30]; //proper QGP formation time in fm/c (0.01<fTau0<10) | |
354 | fParams.fNf= Int_t(par[31]); //number of active quark flavours N_f in QGP fNf=0, 1,2 or 3 | |
355 | fParams.fIenglu= Int_t(par[32]); // flag to fix type of in-medium partonic energy loss | |
356 | //(0: radiative and collisional loss, 1: radiative loss only, 2: | |
357 | //collisional loss only) (default: 0); | |
358 | fParams.fIanglu= Int_t(par[33]); //flag to fix type of angular distribution of in-medium emitted | |
359 | // gluons (0: small-angular, 1: wide-angular, 2:collinear) (default: 0). | |
360 | ||
361 | ||
362 | //PYTHIA parameters: | |
363 | Int_t jj; | |
364 | for (Int_t j = 0; j <25; ++j) { | |
365 | jj= 35+j; | |
366 | SERVICE.parPYTH[j]=par[jj]; | |
367 | } | |
368 | ||
369 | // Set Random Number seed | |
370 | ||
371 | gRandom->SetSeed(fParams.fSeed); //Set 0 to use the current time | |
372 | //to send seed in PYTHIA | |
373 | SERVICE.iseed_fromC=gRandom->GetSeed(); | |
374 | std::cout<<"Seed for random number generation= "<<gRandom->GetSeed()<<std::endl; | |
375 | ||
376 | fParams.fNPartTypes = 0; //counter of hadron species | |
377 | return kTRUE; | |
378 | } | |
379 | ||
380 | Bool_t InitialStateHydjet::MultIni() { | |
7b7936e9 | 381 | // Calculate average multiplicities, chemical potentials (if necessary), |
382 | // initialize pyquen | |
383 | ||
b1c2e580 | 384 | //check and redefine input parameters |
385 | if(fParams.fTMuType>0 && fParams.fSqrtS > 2.24) { | |
386 | if(fParams.fSqrtS < 2.24){ | |
387 | Error("InitialStateHydjet::MultIni", "SqrtS<2.24 not allowed with fParams.fTMuType>0"); | |
388 | return 0; | |
389 | } | |
390 | ||
391 | //sqrt(s) = 2.24 ==> T_kin = 0.8 GeV | |
392 | //see J. Cleymans, H. Oeschler, K. Redlich,S. Wheaton, Phys Rev. C73 034905 (2006) | |
393 | fParams.fMuB = 1.308/(1. + fParams.fSqrtS*0.273); | |
394 | fParams.fT = 0.166 - 0.139*fParams.fMuB*fParams.fMuB - 0.053*fParams.fMuB*fParams.fMuB* | |
395 | fParams.fMuB*fParams.fMuB; | |
396 | fParams.fMuI3 = 0.; | |
397 | fParams.fMuS = 0.; | |
398 | //create strange potential object and set strangeness density 0 | |
399 | NAStrangePotential* psp = new NAStrangePotential(0., fDatabase); | |
400 | psp->SetBaryonPotential(fParams.fMuB); | |
401 | psp->SetTemperature(fParams.fT); | |
402 | //compute strangeness potential | |
403 | if(fParams.fMuB > 0.01) | |
404 | fParams.fMuS = psp->CalculateStrangePotential(); | |
b1c2e580 | 405 | |
406 | //if user choose fYlmax larger then allowed by kinematics at the specified beam energy sqrt(s) | |
407 | if(fParams.fYlmax > TMath::Log(fParams.fSqrtS/0.94)){ | |
408 | Error("InitialStateHydjet::MultIni", "fParams.fYlmax > TMath::Log(fParams.fSqrtS/0.94)!!! "); | |
409 | return 0; | |
410 | } | |
411 | ||
412 | ||
413 | if(fParams.fCorrS <= 0.) { | |
414 | //see F. Becattini, J. Mannien, M. Gazdzicki, Phys Rev. C73 044905 (2006) | |
415 | fParams.fCorrS = 1. - 0.386* TMath::Exp(-1.23*fParams.fT/fParams.fMuB); | |
b1c2e580 | 416 | |
417 | } | |
418 | std::cout<<"The phenomenological f-la J. Cleymans et al. PRC73 034905 (2006) for Tch mu_B was used." << std::endl; | |
419 | std::cout<<"The simulation will be done with the calculated parameters:" << std::endl; | |
420 | std::cout<<"Baryon chemical potential = "<<fParams.fMuB<< " [GeV]" << std::endl; | |
421 | std::cout<<"Strangeness chemical potential = "<<fParams.fMuS<< " [GeV]" << std::endl; | |
422 | std::cout<<"Isospin chemical potential = "<<fParams.fMuI3<< " [GeV]" << std::endl; | |
423 | std::cout<<"Strangeness suppression parameter = "<<fParams.fCorrS << std::endl; | |
424 | std::cout<<"Eta_max = "<<fParams.fYlmax<< std::endl; | |
425 | std::cout << std::endl; | |
426 | ||
427 | } | |
428 | ||
429 | ||
b1c2e580 | 430 | //initialisation of high-pt part |
431 | ||
432 | HYJPAR.nhsel = fParams.fNhsel; | |
433 | HYJPAR.ptmin = fParams.fPtmin; | |
434 | HYJPAR.ishad = fParams.fIshad; | |
435 | HYIPAR.bminh = fParams.fBmin; | |
436 | HYIPAR.bmaxh = fParams.fBmax; | |
437 | HYIPAR.AW = fParams.fAw; | |
438 | ||
439 | HYPYIN.ifb = fParams.fIfb; | |
440 | HYPYIN.bfix = fParams.fBfix; | |
441 | HYPYIN.ene = fParams.fSqrtS; | |
442 | ||
443 | PYQPAR.T0 = fParams.fT0; | |
444 | PYQPAR.tau0 = fParams.fTau0; | |
445 | PYQPAR.nf = fParams.fNf; | |
446 | PYQPAR.ienglu = fParams.fIenglu; | |
447 | PYQPAR.ianglu = fParams.fIanglu; | |
448 | ||
449 | ||
7b7936e9 | 450 | myini_(); // |
b1c2e580 | 451 | |
452 | ||
453 | // calculation of multiplicities of different particle species | |
454 | // according to the grand canonical approach | |
455 | GrandCanonical gc(15, fParams.fT, fParams.fMuB, fParams.fMuS, fParams.fMuI3); | |
3fa37a65 | 456 | GrandCanonical gcCh(15, fParams.fT, fParams.fMuB, fParams.fMuS, fParams.fMuI3); |
457 | GrandCanonical gcPiTh(15, fParams.fThFO, 0., 0., fParams.fMu_th_pip); | |
458 | GrandCanonical gcTh0(15, fParams.fThFO, 0., 0., 0.); | |
b1c2e580 | 459 | |
460 | //effective volume for central | |
461 | double dYl= 2 * fParams.fYlmax; //uniform distr. [-Ylmax; Ylmax] | |
462 | if (fParams.fEtaType >0) dYl = TMath::Sqrt(2 * TMath::Pi()) * fParams.fYlmax ; //Gaussian distr. | |
463 | fVolEff = 2 * TMath::Pi() * fParams.fTau * dYl * (fParams.fR * fParams.fR)/TMath::Power((fParams.fUmax),2) * | |
464 | ((fParams.fUmax)*TMath::SinH((fParams.fUmax))-TMath::CosH((fParams.fUmax))+ 1); | |
b1c2e580 | 465 | |
3fa37a65 | 466 | Double_t particleDensityPiCh=0; |
467 | Double_t particleDensityPiTh=0; | |
b1c2e580 | 468 | |
469 | if(fParams.fThFO != fParams.fT && fParams.fThFO > 0){ | |
3fa37a65 | 470 | particleDensityPiCh = gcCh.ParticleNumberDensity(fDatabase->GetPDGParticle(211)); |
471 | particleDensityPiTh = gcPiTh.ParticleNumberDensity(fDatabase->GetPDGParticle(211)); | |
b1c2e580 | 472 | } |
473 | ||
474 | for(Int_t particleIndex = 0; particleIndex < fDatabase->GetNParticles(); particleIndex++) { | |
475 | ParticlePDG *currParticle = fDatabase->GetPDGParticleByIndex(particleIndex); | |
476 | Int_t encoding = currParticle->GetPDG(); | |
477 | //strangeness supression | |
478 | Double_t gammaS = 1; | |
7b7936e9 | 479 | Int_t s = Int_t(currParticle->GetStrangeness()); |
480 | if(encoding == 333) | |
481 | s = 2; | |
482 | if(fParams.fCorrS < 1. && s != 0) | |
483 | gammaS = TMath::Power(fParams.fCorrS,-TMath::Abs(s)); | |
b1c2e580 | 484 | //average densities |
7b7936e9 | 485 | Double_t particleDensity = gc.ParticleNumberDensity(currParticle)/gammaS; |
b1c2e580 | 486 | |
487 | //compute chemical potential for single f.o. mu==mu_ch | |
488 | Double_t mu = fParams.fMuB * Int_t(currParticle->GetBaryonNumber()) + | |
489 | fParams.fMuS * Int_t(currParticle->GetStrangeness()) + | |
490 | fParams.fMuI3 * Int_t(currParticle->GetElectricCharge()); | |
491 | ||
492 | //thermal f.o. | |
493 | if(fParams.fThFO != fParams.fT && fParams.fThFO > 0){ | |
3fa37a65 | 494 | Double_t particleDensityCh = gcCh.ParticleNumberDensity(currParticle); |
495 | Double_t particleDensityTh0 = gcTh0.ParticleNumberDensity(currParticle); | |
496 | Double_t numbDensBolt = particleDensityPiTh*particleDensityCh/particleDensityPiCh; | |
497 | mu = fParams.fThFO*TMath::Log(numbDensBolt/particleDensityTh0); | |
b1c2e580 | 498 | if(abs(encoding)==211 || encoding==111)mu= fParams.fMu_th_pip; |
3fa37a65 | 499 | particleDensity = numbDensBolt; |
b1c2e580 | 500 | } |
501 | ||
7b7936e9 | 502 | // set particle number density to zero for some species |
503 | // photons | |
504 | if(abs(encoding)==22) | |
505 | particleDensity=0; | |
506 | // K0L and K0S | |
507 | if(abs(encoding)==130 || abs(encoding)==310) { | |
508 | particleDensity=0; | |
509 | } | |
b1c2e580 | 510 | |
511 | if(particleDensity > 0.) { | |
512 | // outMult<<encoding<< " " <<particleDensity<< " "<<mu<<std::endl; | |
513 | fParams.fPartEnc[fParams.fNPartTypes] = encoding; | |
514 | fParams.fPartMult[2 * fParams.fNPartTypes] = particleDensity; | |
515 | fParams.fPartMu[2 * fParams.fNPartTypes] = mu; | |
516 | ++fParams.fNPartTypes; | |
517 | if(fParams.fNPartTypes > 1000) | |
518 | Error("in Bool_t MultIni:", "fNPartTypes is too large %d", fParams.fNPartTypes); | |
519 | } | |
520 | } | |
521 | return kTRUE; | |
522 | } | |
523 | ||
524 | Double_t InitialStateHydjet::SimpsonIntegrator2(Double_t a, Double_t b) { | |
7b7936e9 | 525 | // Simpson integration |
b1c2e580 | 526 | Int_t nsubIntervals=10000; |
527 | Double_t h = (b - a)/nsubIntervals; //0-pi, phi | |
528 | Double_t s=0; | |
b1c2e580 | 529 | Double_t x = 0; //phi |
530 | for(Int_t j = 1; j < nsubIntervals; j++) { | |
531 | x += h; // phi | |
532 | Double_t e = fParams.fEpsilon; | |
3fa37a65 | 533 | Double_t rSB = fParams.fR; //test: podstavit' *coefff_RB |
534 | Double_t rB = rSB *(TMath::Sqrt(1-e*e)/TMath::Sqrt(1+e*TMath::Cos(2*x))); //f-la7 rB | |
7b7936e9 | 535 | Double_t sr = SimpsonIntegrator(0,rB,x); |
b1c2e580 | 536 | s += sr; |
537 | } | |
538 | return s*h; | |
539 | ||
540 | } | |
541 | ||
542 | Double_t InitialStateHydjet::SimpsonIntegrator(Double_t a, Double_t b, Double_t phi) { | |
7b7936e9 | 543 | // Simpson integration |
b1c2e580 | 544 | Int_t nsubIntervals=100; |
545 | Double_t h = (b - a)/nsubIntervals; | |
546 | Double_t s = f2(phi,a + 0.5*h); | |
547 | Double_t t = 0.5*(f2(phi,a) + f2(phi,b)); | |
548 | Double_t x = a; | |
549 | Double_t y = a + 0.5*h; | |
550 | for(Int_t i = 1; i < nsubIntervals; i++) { | |
551 | x += h; | |
552 | y += h; | |
553 | s += f2(phi,y); | |
554 | t += f2(phi,x); | |
555 | } | |
556 | t += 2.0*s; | |
557 | return t*h/3.0; | |
558 | } | |
559 | ||
560 | ||
561 | //f2=f(phi,r) | |
562 | Double_t InitialStateHydjet::f2(Double_t x, Double_t y) { | |
7b7936e9 | 563 | // formula |
3fa37a65 | 564 | Double_t rSB = fParams.fR; //test: podstavit' *coefff_RB |
565 | Double_t rhou = fParams.fUmax * y / rSB; | |
b1c2e580 | 566 | Double_t ff = y*TMath::CosH(rhou)* |
567 | TMath::Sqrt(1+fParams.fDelta*TMath::Cos(2*x)*TMath::TanH(rhou)*TMath::TanH(rhou)); | |
568 | //n_mu u^mu f-la 20 | |
569 | return ff; | |
570 | } | |
571 | ||
572 | ||
573 | Double_t InitialStateHydjet::MidpointIntegrator2(Double_t a, Double_t b) { | |
7b7936e9 | 574 | // Perform integration through the mid-point method |
b1c2e580 | 575 | Int_t nsubIntervals=2000; |
576 | Int_t nsubIntervals2=1; | |
577 | Double_t h = (b - a)/nsubIntervals; //0-pi , phi | |
7b7936e9 | 578 | Double_t h2 = (fParams.fR)/nsubIntervals; //0-R maximal rB ? |
b1c2e580 | 579 | Double_t x = a + 0.5*h; |
580 | Double_t y = 0; | |
b1c2e580 | 581 | Double_t t = f2(x,y); |
b1c2e580 | 582 | Double_t e = fParams.fEpsilon; |
b1c2e580 | 583 | for(Int_t j = 1; j < nsubIntervals; j++) { |
584 | x += h; // integr phi | |
3fa37a65 | 585 | Double_t rSB = fParams.fR; //test: podstavit' *coefff_RB |
586 | Double_t rB = rSB *(TMath::Sqrt(1-e*e)/TMath::Sqrt(1+e*TMath::Cos(2*x))); //f-la7 rB | |
7b7936e9 | 587 | nsubIntervals2 = Int_t(rB / h2)+1; |
b1c2e580 | 588 | // integr R |
589 | y=0; | |
590 | for(Int_t i = 1; i < nsubIntervals2; i++) | |
591 | t += f2(x,(y += h2)); | |
592 | } | |
593 | return t*h*h2; | |
594 | } | |
595 |