| b6d061b7 |
1 | /************************************************************************** |
| 2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
| 3 | * * |
| 4 | * Author: The ALICE Off-line Project. * |
| 5 | * Contributors are mentioned in the code where appropriate. * |
| 6 | * * |
| 7 | * Permission to use, copy, modify and distribute this software and its * |
| 8 | * documentation strictly for non-commercial purposes is hereby granted * |
| 9 | * without fee, provided that the above copyright notice appears in all * |
| 10 | * copies and that both the copyright notice and this permission notice * |
| 11 | * appear in the supporting documentation. The authors make no claims * |
| 12 | * about the suitability of this software for any purpose. It is * |
| 13 | * provided "as is" without express or implied warranty. * |
| 14 | **************************************************************************/ |
| 15 | |
| 16 | /* $Id$ */ |
| 17 | |
| 18 | //---------------------------------------------------------------------------- |
| 19 | // Implementation of the class to calculate the parton energy loss |
| 20 | // Based on the "BDMPS" quenching weights by C.A.Salgado and U.A.Wiedemann |
| 21 | // |
| 22 | // References: |
| 23 | // C.A.Salgado and U.A.Wiedemann, Phys.Rev.D68 (2003) 014008 [hep-ph/0302184] |
| 24 | // A.Dainese, Eur.Phys.J.C, in press, [nucl-ex/0312005] |
| 25 | // |
| 26 | // Origin: C. Loizides constantinos.loizides@cern.ch |
| 27 | // A. Dainese andrea.dainese@pd.infn.it |
| 28 | //---------------------------------------------------------------------------- |
| 29 | |
| 30 | #include <Riostream.h> |
| 31 | #include <TH1F.h> |
| 32 | #include <TH2F.h> |
| 33 | #include <TCanvas.h> |
| 34 | #include <TGraph.h> |
| 35 | #include <TROOT.h> |
| 36 | #include <TSystem.h> |
| 37 | #include <TLegend.h> |
| 38 | #include "AliQuenchingWeights.h" |
| 39 | |
| 40 | ClassImp(AliQuenchingWeights) |
| 41 | |
| 42 | // conversion from fm to GeV^-1: 1 fm = fmGeV GeV^-1 |
| 43 | const Double_t AliQuenchingWeights::gkConvFmToInvGeV = 1./0.197; |
| 44 | |
| 45 | // maximum value of R |
| 46 | const Double_t AliQuenchingWeights::gkRMax = 40000.; |
| 47 | |
| 48 | // counter for histogram labels |
| 49 | Int_t AliQuenchingWeights::gCounter = 0; |
| 50 | |
| 51 | AliQuenchingWeights::AliQuenchingWeights() |
| 52 | : TObject() |
| 53 | { |
| 54 | fTablesLoaded=kFALSE; |
| 55 | fMultSoft=kTRUE; |
| 56 | fHistos=0; |
| 57 | SetMu(); |
| 58 | SetQTransport(); |
| 59 | SetECMethod(); |
| 60 | SetLengthMax(); |
| 61 | fLengthMaxOld=0; |
| 62 | fInstanceNumber=gCounter++; |
| 63 | } |
| 64 | |
| 65 | AliQuenchingWeights::AliQuenchingWeights(const AliQuenchingWeights& a) |
| 66 | : TObject() |
| 67 | { |
| 68 | fTablesLoaded=kFALSE; |
| 69 | fHistos=0; |
| 70 | fLengthMaxOld=0; |
| 71 | fMultSoft=a.GetMultSoft();; |
| 72 | fMu=a.GetMu(); |
| 73 | fQTransport=a.GetQTransport(); |
| 74 | fECMethod=(kECMethod)a.GetECMethod(); |
| 75 | fLengthMax=a.GetLengthMax(); |
| 76 | fInstanceNumber=gCounter++; |
| 77 | //Missing in the class is the pathname |
| 78 | //to the tables, can be added if needed |
| 79 | } |
| 80 | |
| 81 | AliQuenchingWeights::~AliQuenchingWeights() |
| 82 | { |
| 83 | Reset(); |
| 84 | } |
| 85 | |
| 86 | void AliQuenchingWeights::Reset() |
| 87 | { |
| 88 | if(!fHistos) return; |
| 89 | for(Int_t l=0;l<fLengthMaxOld;l++){ |
| 90 | delete fHistos[0][l]; |
| 91 | delete fHistos[1][l]; |
| 92 | } |
| 93 | delete[] fHistos; |
| 94 | fHistos=0; |
| 95 | fLengthMaxOld=0; |
| 96 | } |
| 97 | |
| 98 | void AliQuenchingWeights::SetECMethod(kECMethod type) |
| 99 | { |
| 100 | fECMethod=type; |
| 101 | if(fECMethod==kDefault) |
| 102 | Info("SetECMethod","Energy Constraint Method set to DEFAULT:\nIf (sampled energy loss > parton energy) then sampled energy loss = parton energy."); |
| 103 | else |
| 104 | Info("SetECMethod","Energy Constraint Method set to REWEIGHT:\nRequire sampled energy loss <= parton energy."); |
| 105 | } |
| 106 | |
| 107 | Int_t AliQuenchingWeights::InitMult(const Char_t *contall,const Char_t *discall) |
| 108 | { |
| 109 | // read in tables for multiple scattering approximation |
| 110 | // path to continuum and to discrete part |
| 111 | |
| 112 | fTablesLoaded = kFALSE; |
| 113 | fMultSoft=kTRUE; |
| 114 | |
| 115 | Char_t fname[1024]; |
| 116 | sprintf(fname,"%s",gSystem->ExpandPathName(contall)); |
| 117 | ifstream fincont(fname); |
| 118 | if(!fincont.is_open()) return -1; |
| 119 | |
| 120 | Int_t nn=0; //quarks |
| 121 | while(fincont>>fxx[nn]>>fcaq[0][nn]>>fcaq[1][nn]>>fcaq[2][nn]>>fcaq[3][nn]>> |
| 122 | fcaq[4][nn]>>fcaq[5][nn]>>fcaq[6][nn]>>fcaq[7][nn]>>fcaq[8][nn]>> |
| 123 | fcaq[9][nn]>>fcaq[10][nn]>>fcaq[11][nn]>>fcaq[12][nn]>> |
| 124 | fcaq[13][nn]>> |
| 125 | fcaq[14][nn]>>fcaq[15][nn]>>fcaq[16][nn]>>fcaq[17][nn]>> |
| 126 | fcaq[18][nn]>> |
| 127 | fcaq[19][nn]>>fcaq[20][nn]>>fcaq[21][nn]>>fcaq[22][nn]>> |
| 128 | fcaq[23][nn]>> |
| 129 | fcaq[24][nn]>>fcaq[25][nn]>>fcaq[26][nn]>>fcaq[27][nn]>> |
| 130 | fcaq[28][nn]>> |
| 131 | fcaq[29][nn]) |
| 132 | { |
| 133 | nn++; |
| 134 | if(nn==261) break; |
| 135 | } |
| 136 | |
| 137 | nn=0; //gluons |
| 138 | while(fincont>>fxxg[nn]>>fcag[0][nn]>>fcag[1][nn]>>fcag[2][nn]>>fcag[3][nn]>> |
| 139 | fcag[4][nn]>>fcag[5][nn]>>fcag[6][nn]>>fcag[7][nn]>>fcag[8][nn]>> |
| 140 | fcag[9][nn]>>fcag[10][nn]>>fcag[11][nn]>>fcag[12][nn]>> |
| 141 | fcag[13][nn]>> |
| 142 | fcag[14][nn]>>fcag[15][nn]>>fcag[16][nn]>>fcag[17][nn]>> |
| 143 | fcag[18][nn]>> |
| 144 | fcag[19][nn]>>fcag[20][nn]>>fcag[21][nn]>>fcag[22][nn]>> |
| 145 | fcag[23][nn]>> |
| 146 | fcag[24][nn]>>fcag[25][nn]>>fcag[26][nn]>>fcag[27][nn]>> |
| 147 | fcag[28][nn]>> |
| 148 | fcag[29][nn]) { |
| 149 | nn++; |
| 150 | if(nn==261) break; |
| 151 | } |
| 152 | fincont.close(); |
| 153 | |
| 154 | sprintf(fname,"%s",gSystem->ExpandPathName(discall)); |
| 155 | ifstream findisc(fname); |
| 156 | if(!findisc.is_open()) return -1; |
| 157 | |
| 158 | nn=0; //quarks |
| 159 | while(findisc>>frrr[nn]>>fdaq[nn]) { |
| 160 | nn++; |
| 161 | if(nn==30) break; |
| 162 | } |
| 163 | nn=0; //gluons |
| 164 | while(findisc>>frrrg[nn]>>fdag[nn]) { |
| 165 | nn++; |
| 166 | if(nn==30) break; |
| 167 | } |
| 168 | findisc.close(); |
| 169 | fTablesLoaded = kTRUE; |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | /* |
| 174 | C*************************************************************************** |
| 175 | C Quenching Weights for Multiple Soft Scattering |
| 176 | C February 10, 2003 |
| 177 | C |
| 178 | C Refs: |
| 179 | C |
| 180 | C Carlos A. Salgado and Urs A. Wiedemann, hep-ph/0302184. |
| 181 | C |
| 182 | C Carlos A. Salgado and Urs A. Wiedemann Phys.Rev.Lett.89:092303,2002. |
| 183 | C |
| 184 | C |
| 185 | C This package contains quenching weights for gluon radiation in the |
| 186 | C multiple soft scattering approximation. |
| 187 | C |
| 188 | C swqmult returns the quenching weight for a quark (ipart=1) or |
| 189 | C a gluon (ipart=2) traversing a medium with transport coeficient q and |
| 190 | C length L. The input values are rrrr=0.5*q*L^3 and xxxx=w/wc, where |
| 191 | C wc=0.5*q*L^2 and w is the energy radiated. The output values are |
| 192 | C the continuous and discrete (prefactor of the delta function) parts |
| 193 | C of the quenching weights. |
| 194 | C |
| 195 | C In order to use this routine, the files cont.all and disc.all need to be |
| 196 | C in the working directory. |
| 197 | C |
| 198 | C An initialization of the tables is needed by doing call initmult before |
| 199 | C using swqmult. |
| 200 | C |
| 201 | C Please, send us any comment: |
| 202 | C |
| 203 | C urs.wiedemann@cern.ch |
| 204 | C carlos.salgado@cern.ch |
| 205 | C |
| 206 | C |
| 207 | C------------------------------------------------------------------- |
| 208 | |
| 209 | SUBROUTINE swqmult(ipart,rrrr,xxxx,continuous,discrete) |
| 210 | * |
| 211 | REAL*8 xx(400), daq(30), caq(30,261), rrr(30) |
| 212 | COMMON /dataqua/ xx, daq, caq, rrr |
| 213 | * |
| 214 | REAL*8 xxg(400), dag(30), cag(30,261), rrrg(30) |
| 215 | COMMON /dataglu/ xxg, dag, cag, rrrg |
| 216 | |
| 217 | REAL*8 rrrr,xxxx, continuous, discrete |
| 218 | REAL*8 rrin, xxin |
| 219 | INTEGER nrlow, nrhigh, nxlow, nxhigh |
| 220 | REAL*8 rrhigh, rrlow, rfraclow, rfrachigh |
| 221 | REAL*8 xfraclow, xfrachigh |
| 222 | REAL*8 clow, chigh |
| 223 | * |
| 224 | rrin = rrrr |
| 225 | xxin = xxxx |
| 226 | * |
| 227 | nxlow = int(xxin/0.005) + 1 |
| 228 | nxhigh = nxlow + 1 |
| 229 | xfraclow = (xx(nxhigh)-xxin)/0.005 |
| 230 | xfrachigh = (xxin - xx(nxlow))/0.005 |
| 231 | * |
| 232 | do 666, nr=1,30 |
| 233 | if (rrin.lt.rrr(nr)) then |
| 234 | rrhigh = rrr(nr) |
| 235 | else |
| 236 | rrhigh = rrr(nr-1) |
| 237 | rrlow = rrr(nr) |
| 238 | nrlow = nr |
| 239 | nrhigh = nr-1 |
| 240 | goto 665 |
| 241 | endif |
| 242 | 666 enddo |
| 243 | 665 continue |
| 244 | * |
| 245 | rfraclow = (rrhigh-rrin)/(rrhigh-rrlow) |
| 246 | rfrachigh = (rrin-rrlow)/(rrhigh-rrlow) |
| 247 | * |
| 248 | if(ipart.eq.1) then |
| 249 | clow = xfraclow*caq(nrlow,nxlow)+xfrachigh*caq(nrlow,nxhigh) |
| 250 | chigh = xfraclow*caq(nrhigh,nxlow)+xfrachigh*caq(nrhigh,nxhigh) |
| 251 | else |
| 252 | clow = xfraclow*cag(nrlow,nxlow)+xfrachigh*cag(nrlow,nxhigh) |
| 253 | chigh = xfraclow*cag(nrhigh,nxlow)+xfrachigh*cag(nrhigh,nxhigh) |
| 254 | endif |
| 255 | |
| 256 | continuous = rfraclow*clow + rfrachigh*chigh |
| 257 | |
| 258 | if(ipart.eq.1) then |
| 259 | discrete = rfraclow*daq(nrlow) + rfrachigh*daq(nrhigh) |
| 260 | else |
| 261 | discrete = rfraclow*dag(nrlow) + rfrachigh*dag(nrhigh) |
| 262 | endif |
| 263 | * |
| 264 | END |
| 265 | |
| 266 | subroutine initmult |
| 267 | REAL*8 xxq(400), daq(30), caq(30,261), rrr(30) |
| 268 | COMMON /dataqua/ xxq, daq, caq, rrr |
| 269 | * |
| 270 | REAL*8 xxg(400), dag(30), cag(30,261), rrrg(30) |
| 271 | COMMON /dataglu/ xxg, dag, cag, rrrg |
| 272 | * |
| 273 | OPEN(UNIT=20,FILE='cont.all',STATUS='OLD',ERR=90) |
| 274 | do 110 nn=1,261 |
| 275 | read (20,*) xxq(nn), caq(1,nn), caq(2,nn), caq(3,nn), |
| 276 | + caq(4,nn), caq(5,nn), caq(6,nn), caq(7,nn), caq(8,nn), |
| 277 | + caq(9,nn), caq(10,nn), caq(11,nn), caq(12,nn), |
| 278 | + caq(13,nn), |
| 279 | + caq(14,nn), caq(15,nn), caq(16,nn), caq(17,nn), |
| 280 | + caq(18,nn), |
| 281 | + caq(19,nn), caq(20,nn), caq(21,nn), caq(22,nn), |
| 282 | + caq(23,nn), |
| 283 | + caq(24,nn), caq(25,nn), caq(26,nn), caq(27,nn), |
| 284 | + caq(28,nn), |
| 285 | + caq(29,nn), caq(30,nn) |
| 286 | 110 continue |
| 287 | do 111 nn=1,261 |
| 288 | read (20,*) xxg(nn), cag(1,nn), cag(2,nn), cag(3,nn), |
| 289 | + cag(4,nn), cag(5,nn), cag(6,nn), cag(7,nn), cag(8,nn), |
| 290 | + cag(9,nn), cag(10,nn), cag(11,nn), cag(12,nn), |
| 291 | + cag(13,nn), |
| 292 | + cag(14,nn), cag(15,nn), cag(16,nn), cag(17,nn), |
| 293 | + cag(18,nn), |
| 294 | + cag(19,nn), cag(20,nn), cag(21,nn), cag(22,nn), |
| 295 | + cag(23,nn), |
| 296 | + cag(24,nn), cag(25,nn), cag(26,nn), cag(27,nn), |
| 297 | + cag(28,nn), |
| 298 | + cag(29,nn), cag(30,nn) |
| 299 | 111 continue |
| 300 | close(20) |
| 301 | * |
| 302 | OPEN(UNIT=21,FILE='disc.all',STATUS='OLD',ERR=91) |
| 303 | do 112 nn=1,30 |
| 304 | read (21,*) rrr(nn), daq(nn) |
| 305 | 112 continue |
| 306 | do 113 nn=1,30 |
| 307 | read (21,*) rrrg(nn), dag(nn) |
| 308 | 113 continue |
| 309 | close(21) |
| 310 | * |
| 311 | goto 888 |
| 312 | 90 PRINT*, 'input - output error' |
| 313 | 91 PRINT*, 'input - output error #2' |
| 314 | 888 continue |
| 315 | |
| 316 | end |
| 317 | |
| 318 | ======================================================================= |
| 319 | |
| 320 | Adapted to ROOT macro by A. Dainese - 13/07/2003 |
| 321 | ported to class by C. Loizides - 12/02/2004 |
| 322 | */ |
| 323 | |
| 324 | Int_t AliQuenchingWeights::CalcMult(Int_t ipart, Double_t rrrr,Double_t xxxx, |
| 325 | Double_t &continuous,Double_t &discrete) const |
| 326 | { |
| 327 | // Calculate Multiple Scattering approx. |
| 328 | // weights for given parton type, |
| 329 | // rrrr=0.5*q*L^3 and xxxx=w/wc, wc=0.5*q*L^2 |
| 330 | |
| 331 | // read-in data before first call |
| 332 | if(!fTablesLoaded){ |
| 333 | Error("CalcMult","Tables are not loaded."); |
| 334 | return -1; |
| 335 | } |
| 336 | if(!fMultSoft){ |
| 337 | Error("CalcMult","Tables are not loaded for Multiple Scattering."); |
| 338 | return -1; |
| 339 | } |
| 340 | |
| 341 | Double_t rrin = rrrr; |
| 342 | Double_t xxin = xxxx; |
| 343 | |
| 344 | Int_t nxlow = (Int_t)(xxin/0.01) + 1; |
| 345 | Int_t nxhigh = nxlow + 1; |
| 346 | Double_t xfraclow = (fxx[nxhigh-1]-xxin)/0.01; |
| 347 | Double_t xfrachigh = (xxin - fxx[nxlow-1])/0.01; |
| 348 | |
| 349 | //why this? |
| 350 | if(rrin<=frrr[29]) rrin = 1.05*frrr[29]; // AD |
| 351 | if(rrin>=frrr[0]) rrin = 0.95*frrr[0]; // AD |
| 352 | |
| 353 | Int_t nrlow=0,nrhigh=0; |
| 354 | Double_t rrhigh=0,rrlow=0; |
| 355 | for(Int_t nr=1; nr<=30; nr++) { |
| 356 | if(rrin<frrr[nr-1]) { |
| 357 | rrhigh = frrr[nr-1]; |
| 358 | } else { |
| 359 | rrhigh = frrr[nr-1-1]; |
| 360 | rrlow = frrr[nr-1]; |
| 361 | nrlow = nr; |
| 362 | nrhigh = nr-1; |
| 363 | break; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | rrin = rrrr; // AD |
| 368 | |
| 369 | Double_t rfraclow = (rrhigh-rrin)/(rrhigh-rrlow); |
| 370 | Double_t rfrachigh = (rrin-rrlow)/(rrhigh-rrlow); |
| 371 | |
| 372 | //printf("R = %f,\nRlow = %f, Rhigh = %f,\nRfraclow = %f, Rfrachigh = %f\n",rrin,rrlow,rrhigh,rfraclow,rfrachigh); // AD |
| 373 | |
| 374 | Double_t clow=0,chigh=0; |
| 375 | if(ipart==1) { |
| 376 | clow = xfraclow*fcaq[nrlow-1][nxlow-1]+xfrachigh*fcaq[nrlow-1][nxhigh-1]; |
| 377 | chigh = xfraclow*fcaq[nrhigh-1][nxlow-1]+xfrachigh*fcaq[nrhigh-1][nxhigh-1]; |
| 378 | } else { |
| 379 | clow = xfraclow*fcag[nrlow-1][nxlow-1]+xfrachigh*fcag[nrlow-1][nxhigh-1]; |
| 380 | chigh = xfraclow*fcag[nrhigh-1][nxlow-1]+xfrachigh*fcag[nrhigh-1][nxhigh-1]; |
| 381 | } |
| 382 | |
| 383 | continuous = rfraclow*clow + rfrachigh*chigh; |
| 384 | //printf("rfraclow %f, clow %f, rfrachigh %f, chigh %f,\n continuous %f\n", |
| 385 | // rfraclow,clow,rfrachigh,chigh,continuous); |
| 386 | |
| 387 | if(ipart==1) { |
| 388 | discrete = rfraclow*fdaq[nrlow-1] + rfrachigh*fdaq[nrhigh-1]; |
| 389 | } else { |
| 390 | discrete = rfraclow*fdag[nrlow-1] + rfrachigh*fdag[nrhigh-1]; |
| 391 | } |
| 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | Int_t AliQuenchingWeights::InitSingleHard(const Char_t *contall,const Char_t *discall) |
| 397 | { |
| 398 | // read in tables for Single Hard Approx. |
| 399 | // path to continuum and to discrete part |
| 400 | |
| 401 | fTablesLoaded = kFALSE; |
| 402 | fMultSoft=kFALSE; |
| 403 | |
| 404 | Char_t fname[1024]; |
| 405 | sprintf(fname,"%s",gSystem->ExpandPathName(contall)); |
| 406 | ifstream fincont(fname); |
| 407 | if(!fincont.is_open()) return -1; |
| 408 | |
| 409 | Int_t nn=0; //quarks |
| 410 | while(fincont>>fxx[nn]>>fcaq[0][nn]>>fcaq[1][nn]>>fcaq[2][nn]>>fcaq[3][nn]>> |
| 411 | fcaq[4][nn]>>fcaq[5][nn]>>fcaq[6][nn]>>fcaq[7][nn]>>fcaq[8][nn]>> |
| 412 | fcaq[9][nn]>>fcaq[10][nn]>>fcaq[11][nn]>>fcaq[12][nn]>> |
| 413 | fcaq[13][nn]>> |
| 414 | fcaq[14][nn]>>fcaq[15][nn]>>fcaq[16][nn]>>fcaq[17][nn]>> |
| 415 | fcaq[18][nn]>> |
| 416 | fcaq[19][nn]>>fcaq[20][nn]>>fcaq[21][nn]>>fcaq[22][nn]>> |
| 417 | fcaq[23][nn]>> |
| 418 | fcaq[24][nn]>>fcaq[25][nn]>>fcaq[26][nn]>>fcaq[27][nn]>> |
| 419 | fcaq[28][nn]>> |
| 420 | fcaq[29][nn]) |
| 421 | { |
| 422 | nn++; |
| 423 | if(nn==261) break; |
| 424 | } |
| 425 | |
| 426 | nn=0; //gluons |
| 427 | while(fincont>>fxxg[nn]>>fcag[0][nn]>>fcag[1][nn]>>fcag[2][nn]>>fcag[3][nn]>> |
| 428 | fcag[4][nn]>>fcag[5][nn]>>fcag[6][nn]>>fcag[7][nn]>>fcag[8][nn]>> |
| 429 | fcag[9][nn]>>fcag[10][nn]>>fcag[11][nn]>>fcag[12][nn]>> |
| 430 | fcag[13][nn]>> |
| 431 | fcag[14][nn]>>fcag[15][nn]>>fcag[16][nn]>>fcag[17][nn]>> |
| 432 | fcag[18][nn]>> |
| 433 | fcag[19][nn]>>fcag[20][nn]>>fcag[21][nn]>>fcag[22][nn]>> |
| 434 | fcag[23][nn]>> |
| 435 | fcag[24][nn]>>fcag[25][nn]>>fcag[26][nn]>>fcag[27][nn]>> |
| 436 | fcag[28][nn]>> |
| 437 | fcag[29][nn]) { |
| 438 | nn++; |
| 439 | if(nn==261) break; |
| 440 | } |
| 441 | fincont.close(); |
| 442 | |
| 443 | sprintf(fname,"%s",gSystem->ExpandPathName(discall)); |
| 444 | ifstream findisc(fname); |
| 445 | if(!findisc.is_open()) return -1; |
| 446 | |
| 447 | nn=0; //quarks |
| 448 | while(findisc>>frrr[nn]>>fdaq[nn]) { |
| 449 | nn++; |
| 450 | if(nn==30) break; |
| 451 | } |
| 452 | nn=0; //gluons |
| 453 | while(findisc>>frrrg[nn]>>fdag[nn]) { |
| 454 | nn++; |
| 455 | if(nn==30) break; |
| 456 | } |
| 457 | findisc.close(); |
| 458 | |
| 459 | fTablesLoaded = kTRUE; |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | /* |
| 464 | C*************************************************************************** |
| 465 | C Quenching Weights for Single Hard Scattering |
| 466 | C February 20, 2003 |
| 467 | C |
| 468 | C Refs: |
| 469 | C |
| 470 | C Carlos A. Salgado and Urs A. Wiedemann, hep-ph/0302184. |
| 471 | C |
| 472 | C Carlos A. Salgado and Urs A. Wiedemann Phys.Rev.Lett.89:092303,2002. |
| 473 | C |
| 474 | C |
| 475 | C This package contains quenching weights for gluon radiation in the |
| 476 | C single hard scattering approximation. |
| 477 | C |
| 478 | C swqlin returns the quenching weight for a quark (ipart=1) or |
| 479 | C a gluon (ipart=2) traversing a medium with Debye screening mass mu and |
| 480 | C length L. The input values are rrrr=0.5*mu^2*L^2 and xxxx=w/wc, where |
| 481 | C wc=0.5*mu^2*L and w is the energy radiated. The output values are |
| 482 | C the continuous and discrete (prefactor of the delta function) parts |
| 483 | C of the quenching weights. |
| 484 | C |
| 485 | C In order to use this routine, the files contlin.all and disclin.all |
| 486 | C need to be in the working directory. |
| 487 | C |
| 488 | C An initialization of the tables is needed by doing call initlin before |
| 489 | C using swqlin. |
| 490 | C |
| 491 | C Please, send us any comment: |
| 492 | C |
| 493 | C urs.wiedemann@cern.ch |
| 494 | C carlos.salgado@cern.ch |
| 495 | C |
| 496 | C |
| 497 | C------------------------------------------------------------------- |
| 498 | |
| 499 | |
| 500 | SUBROUTINE swqlin(ipart,rrrr,xxxx,continuous,discrete) |
| 501 | * |
| 502 | REAL*8 xx(400), dalq(30), calq(30,261), rrr(30) |
| 503 | COMMON /datalinqua/ xx, dalq, calq, rrr |
| 504 | * |
| 505 | REAL*8 xxlg(400), dalg(30), calg(30,261), rrrlg(30) |
| 506 | COMMON /datalinglu/ xxlg, dalg, calg, rrrlg |
| 507 | |
| 508 | REAL*8 rrrr,xxxx, continuous, discrete |
| 509 | REAL*8 rrin, xxin |
| 510 | INTEGER nrlow, nrhigh, nxlow, nxhigh |
| 511 | REAL*8 rrhigh, rrlow, rfraclow, rfrachigh |
| 512 | REAL*8 xfraclow, xfrachigh |
| 513 | REAL*8 clow, chigh |
| 514 | * |
| 515 | rrin = rrrr |
| 516 | xxin = xxxx |
| 517 | * |
| 518 | nxlow = int(xxin/0.038) + 1 |
| 519 | nxhigh = nxlow + 1 |
| 520 | xfraclow = (xx(nxhigh)-xxin)/0.038 |
| 521 | xfrachigh = (xxin - xx(nxlow))/0.038 |
| 522 | * |
| 523 | do 666, nr=1,30 |
| 524 | if (rrin.lt.rrr(nr)) then |
| 525 | rrhigh = rrr(nr) |
| 526 | else |
| 527 | rrhigh = rrr(nr-1) |
| 528 | rrlow = rrr(nr) |
| 529 | nrlow = nr |
| 530 | nrhigh = nr-1 |
| 531 | goto 665 |
| 532 | endif |
| 533 | 666 enddo |
| 534 | 665 continue |
| 535 | * |
| 536 | rfraclow = (rrhigh-rrin)/(rrhigh-rrlow) |
| 537 | rfrachigh = (rrin-rrlow)/(rrhigh-rrlow) |
| 538 | * |
| 539 | if(ipart.eq.1) then |
| 540 | clow = xfraclow*calq(nrlow,nxlow)+xfrachigh*calq(nrlow,nxhigh) |
| 541 | chigh = xfraclow*calq(nrhigh,nxlow)+xfrachigh*calq(nrhigh,nxhigh) |
| 542 | else |
| 543 | clow = xfraclow*calg(nrlow,nxlow)+xfrachigh*calg(nrlow,nxhigh) |
| 544 | chigh = xfraclow*calg(nrhigh,nxlow)+xfrachigh*calg(nrhigh,nxhigh) |
| 545 | endif |
| 546 | |
| 547 | continuous = rfraclow*clow + rfrachigh*chigh |
| 548 | |
| 549 | if(ipart.eq.1) then |
| 550 | discrete = rfraclow*dalq(nrlow) + rfrachigh*dalq(nrhigh) |
| 551 | else |
| 552 | discrete = rfraclow*dalg(nrlow) + rfrachigh*dalg(nrhigh) |
| 553 | endif |
| 554 | * |
| 555 | END |
| 556 | |
| 557 | subroutine initlin |
| 558 | REAL*8 xxlq(400), dalq(30), calq(30,261), rrr(30) |
| 559 | COMMON /datalinqua/ xxlq, dalq, calq, rrr |
| 560 | * |
| 561 | REAL*8 xxlg(400), dalg(30), calg(30,261), rrrlg(30) |
| 562 | COMMON /datalinglu/ xxlg, dalg, calg, rrrlg |
| 563 | * |
| 564 | OPEN(UNIT=20,FILE='contlin.all',STATUS='OLD',ERR=90) |
| 565 | do 110 nn=1,261 |
| 566 | read (20,*) xxlq(nn), calq(1,nn), calq(2,nn), calq(3,nn), |
| 567 | + calq(4,nn), calq(5,nn), calq(6,nn), calq(7,nn), calq(8,nn), |
| 568 | + calq(9,nn), calq(10,nn), calq(11,nn), calq(12,nn), |
| 569 | + calq(13,nn), |
| 570 | + calq(14,nn), calq(15,nn), calq(16,nn), calq(17,nn), |
| 571 | + calq(18,nn), |
| 572 | + calq(19,nn), calq(20,nn), calq(21,nn), calq(22,nn), |
| 573 | + calq(23,nn), |
| 574 | + calq(24,nn), calq(25,nn), calq(26,nn), calq(27,nn), |
| 575 | + calq(28,nn), |
| 576 | + calq(29,nn), calq(30,nn) |
| 577 | 110 continue |
| 578 | do 111 nn=1,261 |
| 579 | read (20,*) xxlg(nn), calg(1,nn), calg(2,nn), calg(3,nn), |
| 580 | + calg(4,nn), calg(5,nn), calg(6,nn), calg(7,nn), calg(8,nn), |
| 581 | + calg(9,nn), calg(10,nn), calg(11,nn), calg(12,nn), |
| 582 | + calg(13,nn), |
| 583 | + calg(14,nn), calg(15,nn), calg(16,nn), calg(17,nn), |
| 584 | + calg(18,nn), |
| 585 | + calg(19,nn), calg(20,nn), calg(21,nn), calg(22,nn), |
| 586 | + calg(23,nn), |
| 587 | + calg(24,nn), calg(25,nn), calg(26,nn), calg(27,nn), |
| 588 | + calg(28,nn), |
| 589 | + calg(29,nn), calg(30,nn) |
| 590 | 111 continue |
| 591 | close(20) |
| 592 | * |
| 593 | OPEN(UNIT=21,FILE='disclin.all',STATUS='OLD',ERR=91) |
| 594 | do 112 nn=1,30 |
| 595 | read (21,*) rrr(nn), dalq(nn) |
| 596 | 112 continue |
| 597 | do 113 nn=1,30 |
| 598 | read (21,*) rrrlg(nn), dalg(nn) |
| 599 | 113 continue |
| 600 | close(21) |
| 601 | * |
| 602 | goto 888 |
| 603 | 90 PRINT*, 'input - output error' |
| 604 | 91 PRINT*, 'input - output error #2' |
| 605 | 888 continue |
| 606 | |
| 607 | end |
| 608 | |
| 609 | ======================================================================= |
| 610 | |
| 611 | Ported to class by C. Loizides - 17/02/2004 |
| 612 | |
| 613 | */ |
| 614 | |
| 615 | Int_t AliQuenchingWeights::CalcSingleHard(Int_t ipart, Double_t rrrr,Double_t xxxx, |
| 616 | Double_t &continuous,Double_t &discrete) const |
| 617 | { |
| 618 | // calculate Single Hard approx. |
| 619 | // weights for given parton type, |
| 620 | // rrrr=0.5*mu^2*L^2 and xxxx=w/wc, wc=0.5*mu^2*L |
| 621 | |
| 622 | // read-in data before first call |
| 623 | if(!fTablesLoaded){ |
| 624 | Error("CalcMult","Tables are not loaded."); |
| 625 | return -1; |
| 626 | } |
| 627 | if(!fMultSoft){ |
| 628 | Error("CalcMult","Tables are not loaded for Single Hard Scattering."); |
| 629 | return -1; |
| 630 | } |
| 631 | |
| 632 | Double_t rrin = rrrr; |
| 633 | Double_t xxin = xxxx; |
| 634 | |
| 635 | Int_t nxlow = (Int_t)(xxin/0.038) + 1; |
| 636 | Int_t nxhigh = nxlow + 1; |
| 637 | Double_t xfraclow = (fxx[nxhigh-1]-xxin)/0.038; |
| 638 | Double_t xfrachigh = (xxin - fxx[nxlow-1])/0.038; |
| 639 | |
| 640 | //why this? |
| 641 | if(rrin<=frrr[29]) rrin = 1.05*frrr[29]; // AD |
| 642 | if(rrin>=frrr[0]) rrin = 0.95*frrr[0]; // AD |
| 643 | |
| 644 | Int_t nrlow=0,nrhigh=0; |
| 645 | Double_t rrhigh=0,rrlow=0; |
| 646 | for(Int_t nr=1; nr<=30; nr++) { |
| 647 | if(rrin<frrr[nr-1]) { |
| 648 | rrhigh = frrr[nr-1]; |
| 649 | } else { |
| 650 | rrhigh = frrr[nr-1-1]; |
| 651 | rrlow = frrr[nr-1]; |
| 652 | nrlow = nr; |
| 653 | nrhigh = nr-1; |
| 654 | break; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | rrin = rrrr; // AD |
| 659 | |
| 660 | Double_t rfraclow = (rrhigh-rrin)/(rrhigh-rrlow); |
| 661 | Double_t rfrachigh = (rrin-rrlow)/(rrhigh-rrlow); |
| 662 | |
| 663 | //printf("R = %f,\nRlow = %f, Rhigh = %f,\nRfraclow = %f, Rfrachigh = %f\n",rrin,rrlow,rrhigh,rfraclow,rfrachigh); // AD |
| 664 | |
| 665 | Double_t clow=0,chigh=0; |
| 666 | if(ipart==1) { |
| 667 | clow = xfraclow*fcaq[nrlow-1][nxlow-1]+xfrachigh*fcaq[nrlow-1][nxhigh-1]; |
| 668 | chigh = xfraclow*fcaq[nrhigh-1][nxlow-1]+xfrachigh*fcaq[nrhigh-1][nxhigh-1]; |
| 669 | } else { |
| 670 | clow = xfraclow*fcag[nrlow-1][nxlow-1]+xfrachigh*fcag[nrlow-1][nxhigh-1]; |
| 671 | chigh = xfraclow*fcag[nrhigh-1][nxlow-1]+xfrachigh*fcag[nrhigh-1][nxhigh-1]; |
| 672 | } |
| 673 | |
| 674 | continuous = rfraclow*clow + rfrachigh*chigh; |
| 675 | //printf("rfraclow %f, clow %f, rfrachigh %f, chigh %f,\n continuous %f\n", |
| 676 | // rfraclow,clow,rfrachigh,chigh,continuous); |
| 677 | |
| 678 | if(ipart==1) { |
| 679 | discrete = rfraclow*fdaq[nrlow-1] + rfrachigh*fdaq[nrhigh-1]; |
| 680 | } else { |
| 681 | discrete = rfraclow*fdag[nrlow-1] + rfrachigh*fdag[nrhigh-1]; |
| 682 | } |
| 683 | |
| 684 | return 0; |
| 685 | } |
| 686 | |
| 687 | Int_t AliQuenchingWeights::CalcMult(Int_t ipart, |
| 688 | Double_t w,Double_t qtransp,Double_t length, |
| 689 | Double_t &continuous,Double_t &discrete) const |
| 690 | { |
| 691 | Double_t wc=CalcWC(qtransp,length); |
| 692 | Double_t rrrr=CalcR(wc,length); |
| 693 | Double_t xxxx=w/wc; |
| 694 | return CalcMult(ipart,rrrr,xxxx,continuous,discrete); |
| 695 | } |
| 696 | |
| 697 | Int_t AliQuenchingWeights::CalcSingleHard(Int_t ipart, |
| 698 | Double_t w,Double_t mu,Double_t length, |
| 699 | Double_t &continuous,Double_t &discrete) const |
| 700 | { |
| 701 | Double_t wcbar=CalcWCbar(mu,length); |
| 702 | Double_t rrrr=CalcR(wcbar,length); |
| 703 | Double_t xxxx=w/wcbar; |
| 704 | return CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete); |
| 705 | } |
| 706 | |
| 707 | Double_t AliQuenchingWeights::CalcR(Double_t wc, Double_t l) const |
| 708 | { |
| 709 | Double_t R = wc*l*gkConvFmToInvGeV; |
| 710 | if(R>gkRMax) { |
| 711 | Warning("CalcR","Value of R = %.2f; should be less than %.2f",R,gkRMax); |
| 712 | return -R; |
| 713 | } |
| 714 | return R; |
| 715 | } |
| 716 | |
| 717 | Double_t AliQuenchingWeights::GetELossRandom(Int_t ipart, Double_t length, Double_t e) const |
| 718 | { |
| 719 | // return DeltaE for MS or SH scattering |
| 720 | // for given parton type, length and energy |
| 721 | // Dependant on ECM (energy constraint method) |
| 722 | // e is used to determine where to set bins to zero. |
| 723 | |
| 724 | if(!fHistos){ |
| 725 | Fatal("GetELossRandom","Call SampleEnergyLoss method before!"); |
| 726 | return -1000.; |
| 727 | } |
| 728 | if((ipart<1) || (ipart>2)) { |
| 729 | Fatal("GetELossRandom","ipart =%d; but has to be 1 (quark) or 2 (gluon)",ipart); |
| 730 | return -1000; |
| 731 | } |
| 732 | |
| 733 | Int_t l=(Int_t)length; |
| 734 | if((length-(Double_t)l)>0.5) l++; |
| 735 | if(l<=0) return 0.; |
| 736 | if(l>fLengthMax) l=fLengthMax; |
| 737 | |
| 738 | if(fECMethod==kReweight){ |
| 739 | TH1F *dummy=new TH1F(*fHistos[ipart-1][l-1]); |
| 740 | dummy->SetName("dummy"); |
| 741 | for(Int_t bin=dummy->FindBin(e)+1;bin<=1100;bin++){ |
| 742 | dummy->SetBinContent(bin,0.); |
| 743 | } |
| 744 | dummy->Scale(1./dummy->Integral()); |
| 745 | Double_t ret=dummy->GetRandom(); |
| 746 | delete dummy; |
| 747 | return ret; |
| 748 | //****** !! ALTERNATIVE WAY OF DOING IT !! *** |
| 749 | //Double_t ret = 2.*e; |
| 750 | //while(ret>e) ret=fHistos[ipart-1][l-1]->GetRandom(); |
| 751 | //return ret; |
| 752 | //******************************************** |
| 753 | } else { //kDefault |
| 754 | Double_t ret=fHistos[ipart-1][l-1]->GetRandom(); |
| 755 | if(ret>e) return e; |
| 756 | return ret; |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | Double_t AliQuenchingWeights::CalcQuenchedEnergy(Int_t ipart, Double_t length, Double_t e) const |
| 761 | { |
| 762 | //return quenched parton energy |
| 763 | //for given parton type, length and energy |
| 764 | |
| 765 | Double_t loss=GetELossRandom(ipart,length,e); |
| 766 | return e-loss; |
| 767 | } |
| 768 | |
| 769 | Double_t AliQuenchingWeights::GetELossRandom(Int_t ipart, TH1F *hell, Double_t e=1.e6) const |
| 770 | { |
| 771 | if(!hell){ |
| 772 | Warning("GetELossRandom","Pointer to length distribution is NULL."); |
| 773 | return 0.; |
| 774 | } |
| 775 | Double_t ell=hell->GetRandom(); |
| 776 | return GetELossRandom(ipart,ell,e); |
| 777 | } |
| 778 | |
| 779 | Double_t AliQuenchingWeights::CalcQuenchedEnergy(Int_t ipart, TH1F *hell, Double_t e) const |
| 780 | { |
| 781 | //return quenched parton energy |
| 782 | //for given parton type, length distribution and energy |
| 783 | |
| 784 | Double_t loss=GetELossRandom(ipart,hell,e); |
| 785 | return e-loss; |
| 786 | } |
| 787 | |
| 788 | Int_t AliQuenchingWeights::SampleEnergyLoss() |
| 789 | { |
| 790 | // Has to be called to fill the histograms |
| 791 | // |
| 792 | // For stored values fQTransport loop over |
| 793 | // particle type and length = 1 to fMaxLength (fm) |
| 794 | // to fill energy loss histos |
| 795 | // |
| 796 | // Take histogram of continuous weights |
| 797 | // Take discrete_weight |
| 798 | // If discrete_weight > 1, put all channels to 0, except channel 1 |
| 799 | // Fill channel 1 with discrete_weight/(1-discrete_weight)*integral |
| 800 | |
| 801 | // read-in data before first call |
| 802 | if(!fTablesLoaded){ |
| 803 | Error("CalcMult","Tables are not loaded."); |
| 804 | return -1; |
| 805 | } |
| 806 | |
| 807 | if(fMultSoft) { |
| 808 | Int_t lmax=CalcLengthMax(fQTransport); |
| 809 | if(fLengthMax>lmax){ |
| 810 | Info("SampleEnergyLoss","Maximum length changed from %d to %d;\nin order to have R < %.f",fLengthMax,lmax,gkRMax); |
| 811 | fLengthMax=lmax; |
| 812 | } |
| 813 | } else { |
| 814 | Warning("SampleEnergyLoss","Maximum length not checked,\nbecause SingeHard is not yet tested."); |
| 815 | } |
| 816 | |
| 817 | Reset(); |
| 818 | fHistos=new TH1F**[2]; |
| 819 | fHistos[0]=new TH1F*[fLengthMax]; |
| 820 | fHistos[1]=new TH1F*[fLengthMax]; |
| 821 | fLengthMaxOld=fLengthMax; //remember old value in case |
| 822 | //user wants to reset |
| 823 | |
| 824 | Int_t medvalue=0; |
| 825 | Char_t meddesc[100]; |
| 826 | if(fMultSoft) { |
| 827 | medvalue=(Int_t)(fQTransport*1000.); |
| 828 | sprintf(meddesc,"MS"); |
| 829 | } else { |
| 830 | medvalue=(Int_t)(fMu*1000.); |
| 831 | sprintf(meddesc,"SH"); |
| 832 | } |
| 833 | |
| 834 | for(Int_t ipart=1;ipart<=2;ipart++){ |
| 835 | for(Int_t l=1;l<=fLengthMax;l++){ |
| 836 | |
| 837 | Char_t hname[100]; |
| 838 | sprintf(hname,"hDisc-ContQW_%s_%d_%d_%d_%d",meddesc,fInstanceNumber,ipart,medvalue,l); |
| 839 | Double_t wc = CalcWC(l); |
| 840 | fHistos[ipart-1][l-1] = new TH1F(hname,hname,1100,0.,1.1*wc); |
| 841 | fHistos[ipart-1][l-1]->SetXTitle("#Delta E [GeV]"); |
| 842 | fHistos[ipart-1][l-1]->SetYTitle("p(#Delta E)"); |
| 843 | fHistos[ipart-1][l-1]->SetLineColor(4); |
| 844 | |
| 845 | Double_t rrrr = CalcR(wc,l); |
| 846 | Double_t discrete=0.; |
| 847 | // loop on histogram channels |
| 848 | for(Int_t bin=1; bin<=1100; bin++) { |
| 849 | Double_t xxxx = fHistos[ipart-1][l-1]->GetBinCenter(bin)/wc; |
| 850 | Double_t continuous; |
| 851 | CalcMult(ipart,rrrr,xxxx,continuous,discrete); |
| 852 | fHistos[ipart-1][l-1]->SetBinContent(bin,continuous); |
| 853 | } |
| 854 | // add discrete part to distribution |
| 855 | if(discrete>=1.) |
| 856 | for(Int_t bin=2;bin<=1100;bin++) |
| 857 | fHistos[ipart-1][l-1]->SetBinContent(bin,0.); |
| 858 | else { |
| 859 | Double_t val=discrete/(1.-discrete)*fHistos[ipart-1][l-1]->Integral(1,1100); |
| 860 | fHistos[ipart-1][l-1]->Fill(0.,val); |
| 861 | } |
| 862 | Double_t hint=fHistos[ipart-1][l-1]->Integral(1,1100); |
| 863 | fHistos[ipart-1][l-1]->Scale(1./hint); |
| 864 | } |
| 865 | } |
| 866 | return 0; |
| 867 | } |
| 868 | |
| 869 | const TH1F* AliQuenchingWeights::GetHisto(Int_t ipart,Int_t l) const |
| 870 | { |
| 871 | if(!fHistos){ |
| 872 | Fatal("GetELossRandom","Call SampleEnergyLoss method before!"); |
| 873 | return 0; |
| 874 | } |
| 875 | if((ipart<1) || (ipart>2)) { |
| 876 | Fatal("GetELossRandom","ipart =%d; but has to be 1 (quark) or 2 (gluon)",ipart); |
| 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | if(l<=0) return 0; |
| 881 | if(l>fLengthMax) l=fLengthMax; |
| 882 | |
| 883 | return fHistos[ipart-1][l-1]; |
| 884 | } |
| 885 | |
| 886 | TH1F* AliQuenchingWeights::ComputeQWHisto(Int_t ipart,Double_t medval,Double_t length) const |
| 887 | { |
| 888 | // ipart = 1 for quark, 2 for gluon |
| 889 | // medval a) qtransp = transport coefficient (GeV^2/fm) |
| 890 | // b) mu = Debye mass (GeV) |
| 891 | // length = path length in medium (fm) |
| 892 | // Get from SW tables: |
| 893 | // - discrete weight (probability to have NO energy loss) |
| 894 | // - continuous weight, as a function of dE |
| 895 | // compute up to max dE = 1.1*wc |
| 896 | // (as an histogram named hContQW_<ipart>_<medval*1000>_<l> |
| 897 | // and range [0,1.1*wc] (1100 channels) |
| 898 | |
| 899 | Double_t wc = 0; |
| 900 | Char_t meddesc[100]; |
| 901 | if(fMultSoft) { |
| 902 | wc=CalcWC(medval,length); |
| 903 | sprintf(meddesc,"MS"); |
| 904 | } else { |
| 905 | wc=CalcWCbar(medval,length); |
| 906 | sprintf(meddesc,"SH"); |
| 907 | } |
| 908 | |
| 909 | Char_t hname[100]; |
| 910 | sprintf(hname,"hContQWHisto_%s_%d_%d_%d",meddesc,ipart, |
| 911 | (Int_t)(medval*1000.),(Int_t)length); |
| 912 | |
| 913 | TH1F *hist = new TH1F("hist",hname,1100,0.,1.1*wc); |
| 914 | hist->SetXTitle("#Delta E [GeV]"); |
| 915 | hist->SetYTitle("p(#Delta E)"); |
| 916 | hist->SetLineColor(4); |
| 917 | |
| 918 | Double_t rrrr = CalcR(wc,length); |
| 919 | // loop on histogram channels |
| 920 | for(Int_t bin=1; bin<=1100; bin++) { |
| 921 | Double_t xxxx = hist->GetBinCenter(bin)/wc; |
| 922 | Double_t continuous,discrete; |
| 923 | Int_t ret=0; |
| 924 | if(fMultSoft) ret=CalcMult(ipart,rrrr,xxxx,continuous,discrete); |
| 925 | else ret=CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete); |
| 926 | if(ret!=0){ |
| 927 | delete hist; |
| 928 | return 0; |
| 929 | }; |
| 930 | hist->SetBinContent(bin,continuous); |
| 931 | } |
| 932 | return hist; |
| 933 | } |
| 934 | |
| 935 | TH1F* AliQuenchingWeights::ComputeQWHistoX(Int_t ipart,Double_t medval,Double_t length) const |
| 936 | { |
| 937 | // ipart = 1 for quark, 2 for gluon |
| 938 | // medval a) qtransp = transport coefficient (GeV^2/fm) |
| 939 | // b) mu = Debye mass (GeV) |
| 940 | // length = path length in medium (fm) |
| 941 | // Get from SW tables: |
| 942 | // - discrete weight (probability to have NO energy loss) |
| 943 | // - continuous weight, as a function of dE |
| 944 | // compute up to max dE = 1.1*wc |
| 945 | // (as an histogram named hContQW_<ipart>_<medval*1000>_<l> |
| 946 | // and range [0,1.1] (1100 channels) |
| 947 | |
| 948 | Double_t wc = 0; |
| 949 | Char_t meddesc[100]; |
| 950 | if(fMultSoft) { |
| 951 | wc=CalcWC(medval,length); |
| 952 | sprintf(meddesc,"MS"); |
| 953 | } else { |
| 954 | wc=CalcWCbar(medval,length); |
| 955 | sprintf(meddesc,"SH"); |
| 956 | } |
| 957 | |
| 958 | Char_t hname[100]; |
| 959 | sprintf(hname,"hContQWHistox_%s_%d_%d_%d",meddesc,ipart, |
| 960 | (Int_t)(medval*1000.),(Int_t)length); |
| 961 | |
| 962 | TH1F *histx = new TH1F("histx",hname,1100,0.,1.1); |
| 963 | histx->SetXTitle("x = #Delta E/#omega_{c}"); |
| 964 | if(fMultSoft) |
| 965 | histx->SetYTitle("p(#Delta E/#omega_{c})"); |
| 966 | else |
| 967 | histx->SetYTitle("p(#Delta E/#bar#omega_{c})"); |
| 968 | histx->SetLineColor(4); |
| 969 | |
| 970 | Double_t rrrr = CalcR(wc,length); |
| 971 | // loop on histogram channels |
| 972 | for(Int_t bin=1; bin<=1100; bin++) { |
| 973 | Double_t xxxx = histx->GetBinCenter(bin); |
| 974 | Double_t continuous,discrete; |
| 975 | Int_t ret=0; |
| 976 | if(fMultSoft) ret=CalcMult(ipart,rrrr,xxxx,continuous,discrete); |
| 977 | else ret=CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete); |
| 978 | if(ret!=0){ |
| 979 | delete histx; |
| 980 | return 0; |
| 981 | }; |
| 982 | histx->SetBinContent(bin,continuous); |
| 983 | } |
| 984 | return histx; |
| 985 | } |
| 986 | |
| 987 | TH1F* AliQuenchingWeights::ComputeELossHisto(Int_t ipart,Double_t medval,Double_t l,Double_t e=1.e6) const |
| 988 | { |
| 989 | AliQuenchingWeights *dummy=new AliQuenchingWeights(*this); |
| 990 | if(fMultSoft){ |
| 991 | dummy->SetQTransport(medval); |
| 992 | dummy->InitMult(); |
| 993 | } else { |
| 994 | dummy->SetMu(medval); |
| 995 | dummy->InitSingleHard(); |
| 996 | } |
| 997 | dummy->SampleEnergyLoss(); |
| 998 | |
| 999 | Char_t name[100]; |
| 1000 | Char_t hname[100]; |
| 1001 | if(ipart==1){ |
| 1002 | sprintf(name,"Energy Loss Distribution - Quarks;E_{loss} (GeV);#"); |
| 1003 | sprintf(hname,"hLossQuarks"); |
| 1004 | } else { |
| 1005 | sprintf(name,"Energy Loss Distribution - Gluons;E_{loss} (GeV);#"); |
| 1006 | sprintf(hname,"hLossGluons"); |
| 1007 | } |
| 1008 | |
| 1009 | TH1F *h = new TH1F(hname,name,250,0,250); |
| 1010 | for(Int_t i=0;i<100000;i++){ |
| 1011 | //if(i % 1000 == 0) cout << "." << flush; |
| 1012 | Double_t loss=dummy->GetELossRandom(ipart,l,e); |
| 1013 | h->Fill(loss); |
| 1014 | } |
| 1015 | |
| 1016 | h->SetStats(kTRUE); |
| 1017 | |
| 1018 | delete dummy; |
| 1019 | return h; |
| 1020 | } |
| 1021 | |
| 1022 | TH1F* AliQuenchingWeights::ComputeELossHisto(Int_t ipart,Double_t medval,TH1F *hEll,Double_t e=1.e6) const |
| 1023 | { |
| 1024 | AliQuenchingWeights *dummy=new AliQuenchingWeights(*this); |
| 1025 | if(fMultSoft){ |
| 1026 | dummy->SetQTransport(medval); |
| 1027 | dummy->InitMult(); |
| 1028 | } else { |
| 1029 | dummy->SetMu(medval); |
| 1030 | dummy->InitSingleHard(); |
| 1031 | } |
| 1032 | dummy->SampleEnergyLoss(); |
| 1033 | |
| 1034 | Char_t name[100]; |
| 1035 | Char_t hname[100]; |
| 1036 | if(ipart==1){ |
| 1037 | sprintf(name,"Energy Loss Distribution - Quarks;E_{loss} (GeV);#"); |
| 1038 | sprintf(hname,"hLossQuarks"); |
| 1039 | } else { |
| 1040 | sprintf(name,"Energy Loss Distribution - Gluons;E_{loss} (GeV);#"); |
| 1041 | sprintf(hname,"hLossGluons"); |
| 1042 | } |
| 1043 | |
| 1044 | TH1F *h = new TH1F(hname,name,250,0,250); |
| 1045 | for(Int_t i=0;i<100000;i++){ |
| 1046 | //if(i % 1000 == 0) cout << "." << flush; |
| 1047 | Double_t loss=dummy->GetELossRandom(ipart,hEll,e); |
| 1048 | h->Fill(loss); |
| 1049 | } |
| 1050 | |
| 1051 | h->SetStats(kTRUE); |
| 1052 | |
| 1053 | delete dummy; |
| 1054 | return h; |
| 1055 | } |
| 1056 | |
| 1057 | void AliQuenchingWeights::PlotDiscreteWeights(Int_t len) const |
| 1058 | { |
| 1059 | TCanvas *c; |
| 1060 | if(fMultSoft) |
| 1061 | c = new TCanvas("cdiscms","Discrete Weight for Multiple Scattering",0,0,500,400); |
| 1062 | else |
| 1063 | c = new TCanvas("cdiscsh","Discrete Weight for Single Hard Scattering",0,0,500,400); |
| 1064 | c->cd(); |
| 1065 | |
| 1066 | TH2F *hframe = new TH2F("hdisc","",2,0,5.1,2,0,1); |
| 1067 | hframe->SetStats(0); |
| 1068 | if(fMultSoft) |
| 1069 | hframe->SetXTitle("#hat{q} [GeV^{2}/fm]"); |
| 1070 | else |
| 1071 | hframe->SetXTitle("#mu [GeV]"); |
| 1072 | hframe->SetYTitle("Probability #Delta E = 0 , p_{0}"); |
| 1073 | hframe->Draw(); |
| 1074 | |
| 1075 | TGraph *gq=new TGraph(20); |
| 1076 | Int_t i=0; |
| 1077 | if(fMultSoft) { |
| 1078 | for(Double_t q=0.05;q<=5.05;q+=0.25){ |
| 1079 | Double_t disc,cont; |
| 1080 | CalcMult(1,1.0, q, len, cont, disc); |
| 1081 | gq->SetPoint(i,q,disc);i++; |
| 1082 | } |
| 1083 | } else { |
| 1084 | for(Double_t m=0.05;m<=5.05;m+=0.25){ |
| 1085 | Double_t disc,cont; |
| 1086 | CalcSingleHard(1,1.0, m, len, cont, disc); |
| 1087 | gq->SetPoint(i,m,disc);i++; |
| 1088 | } |
| 1089 | } |
| 1090 | gq->SetMarkerStyle(20); |
| 1091 | gq->Draw("pl"); |
| 1092 | |
| 1093 | TGraph *gg=new TGraph(20); |
| 1094 | i=0; |
| 1095 | if(fMultSoft){ |
| 1096 | for(Double_t q=0.05;q<=5.05;q+=0.25){ |
| 1097 | Double_t disc,cont; |
| 1098 | CalcMult(2,1.0, q, 5., cont, disc); |
| 1099 | gg->SetPoint(i,q,disc);i++; |
| 1100 | } |
| 1101 | } else { |
| 1102 | for(Double_t m=0.05;m<=5.05;m+=0.25){ |
| 1103 | Double_t disc,cont; |
| 1104 | CalcSingleHard(2,1.0, m, 5., cont, disc); |
| 1105 | gg->SetPoint(i,m,disc);i++; |
| 1106 | } |
| 1107 | } |
| 1108 | gg->SetMarkerStyle(24); |
| 1109 | gg->Draw("pl"); |
| 1110 | |
| 1111 | TLegend *l1a = new TLegend(0.5,0.6,.95,0.8); |
| 1112 | l1a->SetFillStyle(0); |
| 1113 | l1a->SetBorderSize(0); |
| 1114 | Char_t label[100]; |
| 1115 | sprintf(label,"L = %d fm",len); |
| 1116 | l1a->AddEntry(gq,label,""); |
| 1117 | l1a->AddEntry(gq,"quark","pl"); |
| 1118 | l1a->AddEntry(gg,"gluon","pl"); |
| 1119 | l1a->Draw(); |
| 1120 | |
| 1121 | c->Update(); |
| 1122 | } |
| 1123 | |
| 1124 | void AliQuenchingWeights::PlotContWeights(Int_t itype,Int_t ell) const |
| 1125 | { |
| 1126 | Float_t medvals[3]; |
| 1127 | Char_t title[1024]; |
| 1128 | Char_t name[1024]; |
| 1129 | if(fMultSoft) { |
| 1130 | if(itype==1) |
| 1131 | sprintf(title,"Cont. Weight for Multiple Scattering - Quarks"); |
| 1132 | else if(itype==2) |
| 1133 | sprintf(title,"Cont. Weight for Multiple Scattering - Gluons"); |
| 1134 | else return; |
| 1135 | medvals[0]=4;medvals[1]=1;medvals[2]=0.5; |
| 1136 | sprintf(name,"ccont-ms-%d",itype); |
| 1137 | } else { |
| 1138 | if(itype==1) |
| 1139 | sprintf(title,"Cont. Weight for Single Hard Scattering - Quarks"); |
| 1140 | else if(itype==2) |
| 1141 | sprintf(title,"Cont. Weight for Single Hard Scattering - Gluons"); |
| 1142 | else return; |
| 1143 | medvals[0]=2;medvals[1]=1;medvals[2]=0.5; |
| 1144 | sprintf(name,"ccont-ms-%d",itype); |
| 1145 | } |
| 1146 | |
| 1147 | TCanvas *c = new TCanvas(name,title,0,0,500,400); |
| 1148 | c->cd(); |
| 1149 | TH1F *h1=ComputeQWHisto(itype,medvals[0],ell); |
| 1150 | h1->SetName("h1"); |
| 1151 | h1->SetTitle(title); |
| 1152 | h1->SetStats(0); |
| 1153 | h1->SetLineColor(1); |
| 1154 | h1->DrawCopy(); |
| 1155 | TH1F *h2=ComputeQWHisto(itype,medvals[1],ell); |
| 1156 | h2->SetName("h2"); |
| 1157 | h2->SetLineColor(2); |
| 1158 | h2->DrawCopy("SAME"); |
| 1159 | TH1F *h3=ComputeQWHisto(itype,medvals[2],ell); |
| 1160 | h3->SetName("h3"); |
| 1161 | h3->SetLineColor(3); |
| 1162 | h3->DrawCopy("SAME"); |
| 1163 | |
| 1164 | TLegend *l1a = new TLegend(0.5,0.6,.95,0.8); |
| 1165 | l1a->SetFillStyle(0); |
| 1166 | l1a->SetBorderSize(0); |
| 1167 | Char_t label[100]; |
| 1168 | sprintf(label,"L = %d fm",ell); |
| 1169 | l1a->AddEntry(h1,label,""); |
| 1170 | if(fMultSoft) { |
| 1171 | sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medvals[0]); |
| 1172 | l1a->AddEntry(h1,label,"pl"); |
| 1173 | sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medvals[1]); |
| 1174 | l1a->AddEntry(h2,label,"pl"); |
| 1175 | sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medvals[2]); |
| 1176 | l1a->AddEntry(h3,label,"pl"); |
| 1177 | } else { |
| 1178 | sprintf(label,"#mu = %.1f GeV",medvals[0]); |
| 1179 | l1a->AddEntry(h1,label,"pl"); |
| 1180 | sprintf(label,"#mu = %.1f GeV",medvals[1]); |
| 1181 | l1a->AddEntry(h2,label,"pl"); |
| 1182 | sprintf(label,"#mu = %.1f GeV",medvals[2]); |
| 1183 | l1a->AddEntry(h3,label,"pl"); |
| 1184 | } |
| 1185 | l1a->Draw(); |
| 1186 | |
| 1187 | c->Update(); |
| 1188 | } |
| 1189 | |
| 1190 | void AliQuenchingWeights::PlotContWeights(Int_t itype,Double_t medval) const |
| 1191 | { |
| 1192 | Char_t title[1024]; |
| 1193 | Char_t name[1024]; |
| 1194 | if(fMultSoft) { |
| 1195 | if(itype==1) |
| 1196 | sprintf(title,"Cont. Weight for Multiple Scattering - Quarks"); |
| 1197 | else if(itype==2) |
| 1198 | sprintf(title,"Cont. Weight for Multiple Scattering - Gluons"); |
| 1199 | else return; |
| 1200 | sprintf(name,"ccont2-ms-%d",itype); |
| 1201 | } else { |
| 1202 | if(itype==1) |
| 1203 | sprintf(title,"Cont. Weight for Single Hard Scattering - Quarks"); |
| 1204 | else if(itype==2) |
| 1205 | sprintf(title,"Cont. Weight for Single Hard Scattering - Gluons"); |
| 1206 | else return; |
| 1207 | sprintf(name,"ccont2-sh-%d",itype); |
| 1208 | } |
| 1209 | TCanvas *c = new TCanvas(name,title,0,0,500,400); |
| 1210 | c->cd(); |
| 1211 | TH1F *h1=ComputeQWHisto(itype,medval,8); |
| 1212 | h1->SetName("h1"); |
| 1213 | h1->SetTitle(title); |
| 1214 | h1->SetStats(0); |
| 1215 | h1->SetLineColor(1); |
| 1216 | h1->DrawCopy(); |
| 1217 | TH1F *h2=ComputeQWHisto(itype,medval,5); |
| 1218 | h2->SetName("h2"); |
| 1219 | h2->SetLineColor(2); |
| 1220 | h2->DrawCopy("SAME"); |
| 1221 | TH1F *h3=ComputeQWHisto(itype,medval,2); |
| 1222 | h3->SetName("h3"); |
| 1223 | h3->SetLineColor(3); |
| 1224 | h3->DrawCopy("SAME"); |
| 1225 | |
| 1226 | TLegend *l1a = new TLegend(0.5,0.6,.95,0.8); |
| 1227 | l1a->SetFillStyle(0); |
| 1228 | l1a->SetBorderSize(0); |
| 1229 | Char_t label[100]; |
| 1230 | if(fMultSoft) |
| 1231 | sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medval); |
| 1232 | else |
| 1233 | sprintf(label,"#mu = %.1f GeV",medval); |
| 1234 | |
| 1235 | l1a->AddEntry(h1,label,""); |
| 1236 | l1a->AddEntry(h1,"L = 8 fm","pl"); |
| 1237 | l1a->AddEntry(h2,"L = 5 fm","pl"); |
| 1238 | l1a->AddEntry(h3,"L = 2 fm","pl"); |
| 1239 | l1a->Draw(); |
| 1240 | |
| 1241 | c->Update(); |
| 1242 | } |
| 1243 | |
| 1244 | void AliQuenchingWeights::PlotAvgELoss(Int_t len,Double_t e=1.e6) const |
| 1245 | { |
| 1246 | if(!fTablesLoaded){ |
| 1247 | Error("CalcMult","Tables are not loaded."); |
| 1248 | return; |
| 1249 | } |
| 1250 | |
| 1251 | Char_t title[1024]; |
| 1252 | Char_t name[1024]; |
| 1253 | if(fMultSoft){ |
| 1254 | sprintf(title,"Average Loss for Multiple Scattering"); |
| 1255 | sprintf(name,"cavgelossms"); |
| 1256 | } else { |
| 1257 | sprintf(title,"Average Loss for Single Hard Scattering"); |
| 1258 | sprintf(name,"cavgelosssh"); |
| 1259 | } |
| 1260 | |
| 1261 | TCanvas *c = new TCanvas(name,title,0,0,500,400); |
| 1262 | c->cd(); |
| 1263 | TH2F *hframe = new TH2F("avgloss",title,2,0,5.1,2,0,100); |
| 1264 | hframe->SetStats(0); |
| 1265 | if(fMultSoft) |
| 1266 | hframe->SetXTitle("#hat{q} [GeV^{2}/fm]"); |
| 1267 | else |
| 1268 | hframe->SetXTitle("#mu [GeV]"); |
| 1269 | hframe->SetYTitle("<E_{loss}> [GeV]"); |
| 1270 | hframe->Draw(); |
| 1271 | |
| 1272 | TGraph *gq=new TGraph(20); |
| 1273 | Int_t i=0; |
| 1274 | for(Double_t v=0.05;v<=5.05;v+=0.25){ |
| 1275 | TH1F *dummy=ComputeELossHisto(1,v,len,e); |
| 1276 | Double_t avgloss=dummy->GetMean(); |
| 1277 | gq->SetPoint(i,v,avgloss);i++; |
| 1278 | delete dummy; |
| 1279 | } |
| 1280 | gq->SetMarkerStyle(20); |
| 1281 | gq->Draw("pl"); |
| 1282 | |
| 1283 | TGraph *gg=new TGraph(20); |
| 1284 | i=0; |
| 1285 | for(Double_t v=0.05;v<=5.05;v+=0.25){ |
| 1286 | TH1F *dummy=ComputeELossHisto(2,v,len,e); |
| 1287 | Double_t avgloss=dummy->GetMean(); |
| 1288 | gg->SetPoint(i,v,avgloss);i++; |
| 1289 | delete dummy; |
| 1290 | } |
| 1291 | gg->SetMarkerStyle(24); |
| 1292 | gg->Draw("pl"); |
| 1293 | |
| 1294 | TLegend *l1a = new TLegend(0.5,0.6,.95,0.8); |
| 1295 | l1a->SetFillStyle(0); |
| 1296 | l1a->SetBorderSize(0); |
| 1297 | Char_t label[100]; |
| 1298 | sprintf(label,"L = %d fm",len); |
| 1299 | l1a->AddEntry(gq,label,""); |
| 1300 | l1a->AddEntry(gq,"quark","pl"); |
| 1301 | l1a->AddEntry(gg,"gluon","pl"); |
| 1302 | l1a->Draw(); |
| 1303 | |
| 1304 | c->Update(); |
| 1305 | } |
| 1306 | |
| 1307 | void AliQuenchingWeights::PlotAvgELoss(TH1F *hEll,Double_t e=1.e6) const |
| 1308 | { |
| 1309 | if(!fTablesLoaded){ |
| 1310 | Error("CalcMult","Tables are not loaded."); |
| 1311 | return; |
| 1312 | } |
| 1313 | |
| 1314 | Char_t title[1024]; |
| 1315 | Char_t name[1024]; |
| 1316 | if(fMultSoft){ |
| 1317 | sprintf(title,"Average Loss for Multiple Scattering"); |
| 1318 | sprintf(name,"cavgelossms2"); |
| 1319 | } else { |
| 1320 | sprintf(title,"Average Loss for Single Hard Scattering"); |
| 1321 | sprintf(name,"cavgelosssh2"); |
| 1322 | } |
| 1323 | |
| 1324 | TCanvas *c = new TCanvas(name,title,0,0,500,400); |
| 1325 | c->cd(); |
| 1326 | TH2F *hframe = new TH2F("havgloss",title,2,0,5.1,2,0,100); |
| 1327 | hframe->SetStats(0); |
| 1328 | if(fMultSoft) |
| 1329 | hframe->SetXTitle("#hat{q} [GeV^{2}/fm]"); |
| 1330 | else |
| 1331 | hframe->SetXTitle("#mu [GeV]"); |
| 1332 | hframe->SetYTitle("<E_{loss}> [GeV]"); |
| 1333 | hframe->Draw(); |
| 1334 | |
| 1335 | TGraph *gq=new TGraph(20); |
| 1336 | Int_t i=0; |
| 1337 | for(Double_t v=0.05;v<=5.05;v+=0.25){ |
| 1338 | TH1F *dummy=ComputeELossHisto(1,v,hEll,e); |
| 1339 | Double_t avgloss=dummy->GetMean(); |
| 1340 | gq->SetPoint(i,v,avgloss);i++; |
| 1341 | delete dummy; |
| 1342 | } |
| 1343 | gq->SetMarkerStyle(20); |
| 1344 | gq->Draw("pl"); |
| 1345 | |
| 1346 | TGraph *gg=new TGraph(20); |
| 1347 | i=0; |
| 1348 | for(Double_t v=0.05;v<=5.05;v+=0.25){ |
| 1349 | TH1F *dummy=ComputeELossHisto(2,v,hEll,e); |
| 1350 | Double_t avgloss=dummy->GetMean(); |
| 1351 | gg->SetPoint(i,v,avgloss);i++; |
| 1352 | delete dummy; |
| 1353 | } |
| 1354 | gg->SetMarkerStyle(24); |
| 1355 | gg->Draw("pl"); |
| 1356 | |
| 1357 | TLegend *l1a = new TLegend(0.5,0.6,.95,0.8); |
| 1358 | l1a->SetFillStyle(0); |
| 1359 | l1a->SetBorderSize(0); |
| 1360 | Char_t label[100]; |
| 1361 | sprintf(label,"<L> = %.2f fm",hEll->GetMean()); |
| 1362 | l1a->AddEntry(gq,label,""); |
| 1363 | l1a->AddEntry(gq,"quark","pl"); |
| 1364 | l1a->AddEntry(gg,"gluon","pl"); |
| 1365 | l1a->Draw(); |
| 1366 | |
| 1367 | c->Update(); |
| 1368 | } |
| 1369 | |
| 1370 | void AliQuenchingWeights::PlotAvgELossVsPt(Double_t medval,Int_t len) const |
| 1371 | { |
| 1372 | if(!fTablesLoaded){ |
| 1373 | Error("CalcMult","Tables are not loaded."); |
| 1374 | return; |
| 1375 | } |
| 1376 | |
| 1377 | Char_t title[1024]; |
| 1378 | Char_t name[1024]; |
| 1379 | if(fMultSoft){ |
| 1380 | sprintf(title,"Relative Loss for Multiple Scattering"); |
| 1381 | sprintf(name,"cavgelossvsptms"); |
| 1382 | } else { |
| 1383 | sprintf(title,"Relative Loss for Single Hard Scattering"); |
| 1384 | sprintf(name,"cavgelossvsptsh"); |
| 1385 | } |
| 1386 | |
| 1387 | TCanvas *c = new TCanvas(name,title,0,0,500,400); |
| 1388 | c->cd(); |
| 1389 | TH2F *hframe = new TH2F("havglossvspt",title,2,0,100,2,0,1); |
| 1390 | hframe->SetStats(0); |
| 1391 | hframe->SetXTitle("p_{T} [GeV]"); |
| 1392 | hframe->SetYTitle("<E_{loss}>/p_{T} [GeV]"); |
| 1393 | hframe->Draw(); |
| 1394 | |
| 1395 | TGraph *gq=new TGraph(40); |
| 1396 | Int_t i=0; |
| 1397 | for(Double_t pt=2.5;pt<=100.05;pt+=2.5){ |
| 1398 | TH1F *dummy=ComputeELossHisto(1,medval,len,pt); |
| 1399 | Double_t avgloss=dummy->GetMean(); |
| 1400 | gq->SetPoint(i,pt,avgloss/pt);i++; |
| 1401 | delete dummy; |
| 1402 | } |
| 1403 | gq->SetMarkerStyle(20); |
| 1404 | gq->Draw("pl"); |
| 1405 | |
| 1406 | TGraph *gg=new TGraph(40); |
| 1407 | i=0; |
| 1408 | for(Double_t pt=2.5;pt<=100.05;pt+=2.5){ |
| 1409 | TH1F *dummy=ComputeELossHisto(2,medval,len,pt); |
| 1410 | Double_t avgloss=dummy->GetMean(); |
| 1411 | gg->SetPoint(i,pt,avgloss/pt);i++; |
| 1412 | delete dummy; |
| 1413 | } |
| 1414 | gg->SetMarkerStyle(24); |
| 1415 | gg->Draw("pl"); |
| 1416 | |
| 1417 | TLegend *l1a = new TLegend(0.5,0.6,.95,0.8); |
| 1418 | l1a->SetFillStyle(0); |
| 1419 | l1a->SetBorderSize(0); |
| 1420 | Char_t label[100]; |
| 1421 | sprintf(label,"L = %d fm",len); |
| 1422 | l1a->AddEntry(gq,label,""); |
| 1423 | l1a->AddEntry(gq,"quark","pl"); |
| 1424 | l1a->AddEntry(gg,"gluon","pl"); |
| 1425 | l1a->Draw(); |
| 1426 | |
| 1427 | c->Update(); |
| 1428 | } |
| 1429 | |
| 1430 | void AliQuenchingWeights::PlotAvgELossVsPt(Double_t medval,TH1F *hEll) const |
| 1431 | { |
| 1432 | if(!fTablesLoaded){ |
| 1433 | Error("CalcMult","Tables are not loaded."); |
| 1434 | return; |
| 1435 | } |
| 1436 | |
| 1437 | Char_t title[1024]; |
| 1438 | Char_t name[1024]; |
| 1439 | if(fMultSoft){ |
| 1440 | sprintf(title,"Relative Loss for Multiple Scattering"); |
| 1441 | sprintf(name,"cavgelossvsptms2"); |
| 1442 | } else { |
| 1443 | sprintf(title,"Relative Loss for Single Hard Scattering"); |
| 1444 | sprintf(name,"cavgelossvsptsh2"); |
| 1445 | } |
| 1446 | TCanvas *c = new TCanvas(name,title,0,0,500,400); |
| 1447 | c->cd(); |
| 1448 | TH2F *hframe = new TH2F("havglossvspt",title,2,0,100,2,0,1); |
| 1449 | hframe->SetStats(0); |
| 1450 | hframe->SetXTitle("p_{T} [GeV]"); |
| 1451 | hframe->SetYTitle("<E_{loss}>/p_{T} [GeV]"); |
| 1452 | hframe->Draw(); |
| 1453 | |
| 1454 | TGraph *gq=new TGraph(40); |
| 1455 | Int_t i=0; |
| 1456 | for(Double_t pt=2.5;pt<=100.05;pt+=2.5){ |
| 1457 | TH1F *dummy=ComputeELossHisto(1,medval,hEll,pt); |
| 1458 | Double_t avgloss=dummy->GetMean(); |
| 1459 | gq->SetPoint(i,pt,avgloss/pt);i++; |
| 1460 | delete dummy; |
| 1461 | } |
| 1462 | gq->SetMarkerStyle(20); |
| 1463 | gq->Draw("pl"); |
| 1464 | |
| 1465 | TGraph *gg=new TGraph(40); |
| 1466 | i=0; |
| 1467 | for(Double_t pt=2.5;pt<=100.05;pt+=2.5){ |
| 1468 | TH1F *dummy=ComputeELossHisto(2,medval,hEll,pt); |
| 1469 | Double_t avgloss=dummy->GetMean(); |
| 1470 | gg->SetPoint(i,pt,avgloss/pt);i++; |
| 1471 | delete dummy; |
| 1472 | } |
| 1473 | gg->SetMarkerStyle(24); |
| 1474 | gg->Draw("pl"); |
| 1475 | |
| 1476 | TLegend *l1a = new TLegend(0.5,0.6,.95,0.8); |
| 1477 | l1a->SetFillStyle(0); |
| 1478 | l1a->SetBorderSize(0); |
| 1479 | Char_t label[100]; |
| 1480 | sprintf(label,"<L> = %.2f fm",hEll->GetMean()); |
| 1481 | l1a->AddEntry(gq,label,""); |
| 1482 | l1a->AddEntry(gq,"quark","pl"); |
| 1483 | l1a->AddEntry(gg,"gluon","pl"); |
| 1484 | l1a->Draw(); |
| 1485 | |
| 1486 | c->Update(); |
| 1487 | } |
| 1488 | |
git://git.uio.no / u / mrichter / AliRoot.git / blame