1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
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
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]
27 // Origin: C. Loizides constantinos.loizides@cern.ch
28 // A. Dainese andrea.dainese@pd.infn.it
30 //=================== Added by C. Loizides 27/03/04 ===========================
32 // Added support for k-Quenching, where wc=I1*k and R=2I1^2/I0*k
33 // (see the AliFastGlauber class for definition of I0/I1)
34 //-----------------------------------------------------------------------------
36 #include <Riostream.h>
45 #include "AliQuenchingWeights.h"
47 ClassImp(AliQuenchingWeights)
49 // conversion from fm to GeV^-1: 1 fm = fmGeV GeV^-1
50 const Double_t AliQuenchingWeights::fgkConvFmToInvGeV = 1./0.197;
53 const Double_t AliQuenchingWeights::fgkRMax = 1.e6;
56 const Int_t AliQuenchingWeights::fgkBins = 1300;
57 const Double_t AliQuenchingWeights::fgkMaxBin = 1.3;
59 // counter for histogram labels
60 Int_t AliQuenchingWeights::fgCounter = 0;
63 AliQuenchingWeights::AliQuenchingWeights()
77 fInstanceNumber=fgCounter++;
79 sprintf(name,"hhistoqw_%d",fInstanceNumber);
80 fHisto = new TH1F(name,"",fgkBins,0.,fgkMaxBin);
81 for(Int_t bin=1;bin<=fgkBins;bin++)
82 fHisto->SetBinContent(bin,0.);
85 AliQuenchingWeights::AliQuenchingWeights(const AliQuenchingWeights& a)
93 fMultSoft=a.GetMultSoft();;
96 fQTransport=a.GetQTransport();
97 fECMethod=(kECMethod)a.GetECMethod();
98 fLengthMax=a.GetLengthMax();
99 fInstanceNumber=fgCounter++;
101 sprintf(name,"hhistoqw_%d",fInstanceNumber);
102 fHisto = new TH1F(name,"",fgkBins,0.,fgkMaxBin);
103 for(Int_t bin=1;bin<=fgkBins;bin++)
104 fHisto->SetBinContent(bin,0.);
106 //Missing in the class is the pathname
107 //to the tables, can be added if needed
110 AliQuenchingWeights::~AliQuenchingWeights()
116 void AliQuenchingWeights::Reset()
118 //reset tables if there were used
121 for(Int_t l=0;l<4*fLengthMaxOld;l++){
122 delete fHistos[0][l];
123 delete fHistos[1][l];
130 void AliQuenchingWeights::SetECMethod(kECMethod type)
132 //set energy constraint method
135 if(fECMethod==kDefault)
136 Info("SetECMethod","Energy Constraint Method set to DEFAULT:\nIf (sampled energy loss > parton energy) then sampled energy loss = parton energy.");
137 else if(fECMethod==kReweight)
138 Info("SetECMethod","Energy Constraint Method set to REWEIGHT:\nRequire sampled energy loss <= parton energy.");
139 else Info("SetECMethod","Energy Constraint Method set to REWEIGHTCONT:\nRequire sampled energy loss <= parton energy (only implemented for FAST method.");
142 Int_t AliQuenchingWeights::InitMult(const Char_t *contall,const Char_t *discall)
144 // read in tables for multiple scattering approximation
145 // path to continuum and to discrete part
147 fTablesLoaded = kFALSE;
151 sprintf(fname,"%s",gSystem->ExpandPathName(contall));
152 //PH ifstream fincont(fname);
153 fstream fincont(fname,ios::in);
154 #if defined(__HP_aCC) || defined(__DECCXX)
155 if(!fincont.rdbuf()->is_open()) return -1;
157 if(!fincont.is_open()) return -1;
161 while(fincont>>fxx[nn]>>fcaq[0][nn]>>fcaq[1][nn]>>fcaq[2][nn]>>fcaq[3][nn]>>
162 fcaq[4][nn]>>fcaq[5][nn]>>fcaq[6][nn]>>fcaq[7][nn]>>fcaq[8][nn]>>
163 fcaq[9][nn]>>fcaq[10][nn]>>fcaq[11][nn]>>fcaq[12][nn]>>fcaq[13][nn]>>
164 fcaq[14][nn]>>fcaq[15][nn]>>fcaq[16][nn]>>fcaq[17][nn]>>fcaq[18][nn]>>
165 fcaq[19][nn]>>fcaq[20][nn]>>fcaq[21][nn]>>fcaq[22][nn]>>fcaq[23][nn]>>
166 fcaq[24][nn]>>fcaq[25][nn]>>fcaq[26][nn]>>fcaq[27][nn]>>fcaq[28][nn]>>
167 fcaq[29][nn]>>fcaq[30][nn]>>fcaq[31][nn]>>fcaq[32][nn]>>fcaq[33][nn])
174 while(fincont>>fxxg[nn]>>fcag[0][nn]>>fcag[1][nn]>>fcag[2][nn]>>fcag[3][nn]>>
175 fcag[4][nn]>>fcag[5][nn]>>fcag[6][nn]>>fcag[7][nn]>>fcag[8][nn]>>
176 fcag[9][nn]>>fcag[10][nn]>>fcag[11][nn]>>fcag[12][nn]>>fcag[13][nn]>>
177 fcag[14][nn]>>fcag[15][nn]>>fcag[16][nn]>>fcag[17][nn]>>fcag[18][nn]>>
178 fcag[19][nn]>>fcag[20][nn]>>fcag[21][nn]>>fcag[22][nn]>>fcag[23][nn]>>
179 fcag[24][nn]>>fcag[25][nn]>>fcag[26][nn]>>fcag[27][nn]>>fcag[28][nn]>>
180 fcag[29][nn]>>fcag[30][nn]>>fcag[31][nn]>>fcag[32][nn]>>fcag[33][nn])
187 sprintf(fname,"%s",gSystem->ExpandPathName(discall));
188 //PH ifstream findisc(fname);
189 fstream findisc(fname,ios::in);
190 #if defined(__HP_aCC) || defined(__DECCXX)
191 if(!findisc.rdbuf()->is_open()) return -1;
193 if(!findisc.is_open()) return -1;
197 while(findisc>>frrr[nn]>>fdaq[nn]) {
202 while(findisc>>frrrg[nn]>>fdag[nn]) {
207 fTablesLoaded = kTRUE;
212 C***************************************************************************
213 C Quenching Weights for Multiple Soft Scattering
218 C Carlos A. Salgado and Urs A. Wiedemann, hep-ph/0302184.
220 C Carlos A. Salgado and Urs A. Wiedemann Phys.Rev.Lett.89:092303,2002.
223 C This package contains quenching weights for gluon radiation in the
224 C multiple soft scattering approximation.
226 C swqmult returns the quenching weight for a quark (ipart=1) or
227 C a gluon (ipart=2) traversing a medium with transport coeficient q and
228 C length L. The input values are rrrr=0.5*q*L^3 and xxxx=w/wc, where
229 C wc=0.5*q*L^2 and w is the energy radiated. The output values are
230 C the continuous and discrete (prefactor of the delta function) parts
231 C of the quenching weights.
233 C In order to use this routine, the files cont.all and disc.all need to be
234 C in the working directory.
236 C An initialization of the tables is needed by doing call initmult before
239 C Please, send us any comment:
241 C urs.wiedemann@cern.ch
242 C carlos.salgado@cern.ch
245 C-------------------------------------------------------------------
247 SUBROUTINE swqmult(ipart,rrrr,xxxx,continuous,discrete)
249 REAL*8 xx(400), daq(34), caq(34,261), rrr(34)
250 COMMON /dataqua/ xx, daq, caq, rrr
252 REAL*8 xxg(400), dag(34), cag(34,261), rrrg(34)
253 COMMON /dataglu/ xxg, dag, cag, rrrg
255 REAL*8 rrrr,xxxx, continuous, discrete
257 INTEGER nrlow, nrhigh, nxlow, nxhigh
258 REAL*8 rrhigh, rrlow, rfraclow, rfrachigh
259 REAL*8 xfraclow, xfrachigh
270 if (rrin.lt.rrr(nr)) then
282 rfraclow = (rrhigh-rrin)/(rrhigh-rrlow)
283 rfrachigh = (rrin-rrlow)/(rrhigh-rrlow)
284 if (rrin.gt.10000d0) then
285 rfraclow = dlog(rrhigh/rrin)/dlog(rrhigh/rrlow)
286 rfrachigh = dlog(rrin/rrlow)/dlog(rrhigh/rrlow)
289 if (ipart.eq.1.and.rrin.ge.rrr(1)) then
296 if (ipart.ne.1.and.rrin.ge.rrrg(1)) then
303 if (xxxx.ge.xx(261)) go to 245
305 nxlow = int(xxin/0.01) + 1
307 xfraclow = (xx(nxhigh)-xxin)/0.01
308 xfrachigh = (xxin - xx(nxlow))/0.01
311 clow = xfraclow*caq(nrlow,nxlow)+xfrachigh*caq(nrlow,nxhigh)
312 chigh = xfraclow*caq(nrhigh,nxlow)+xfrachigh*caq(nrhigh,nxhigh)
314 clow = xfraclow*cag(nrlow,nxlow)+xfrachigh*cag(nrlow,nxhigh)
315 chigh = xfraclow*cag(nrhigh,nxlow)+xfrachigh*cag(nrhigh,nxhigh)
318 continuous = rfraclow*clow + rfrachigh*chigh
323 discrete = rfraclow*daq(nrlow) + rfrachigh*daq(nrhigh)
325 discrete = rfraclow*dag(nrlow) + rfrachigh*dag(nrhigh)
331 REAL*8 xxq(400), daq(34), caq(34,261), rrr(34)
332 COMMON /dataqua/ xxq, daq, caq, rrr
334 REAL*8 xxg(400), dag(34), cag(34,261), rrrg(34)
335 COMMON /dataglu/ xxg, dag, cag, rrrg
337 OPEN(UNIT=20,FILE='contnew.all',STATUS='OLD',ERR=90)
339 read (20,*) xxq(nn), caq(1,nn), caq(2,nn), caq(3,nn),
340 + caq(4,nn), caq(5,nn), caq(6,nn), caq(7,nn), caq(8,nn),
341 + caq(9,nn), caq(10,nn), caq(11,nn), caq(12,nn),
343 + caq(14,nn), caq(15,nn), caq(16,nn), caq(17,nn),
345 + caq(19,nn), caq(20,nn), caq(21,nn), caq(22,nn),
347 + caq(24,nn), caq(25,nn), caq(26,nn), caq(27,nn),
349 + caq(29,nn), caq(30,nn), caq(31,nn), caq(32,nn),
350 + caq(33,nn), caq(34,nn)
353 read (20,*) xxg(nn), cag(1,nn), cag(2,nn), cag(3,nn),
354 + cag(4,nn), cag(5,nn), cag(6,nn), cag(7,nn), cag(8,nn),
355 + cag(9,nn), cag(10,nn), cag(11,nn), cag(12,nn),
357 + cag(14,nn), cag(15,nn), cag(16,nn), cag(17,nn),
359 + cag(19,nn), cag(20,nn), cag(21,nn), cag(22,nn),
361 + cag(24,nn), cag(25,nn), cag(26,nn), cag(27,nn),
363 + cag(29,nn), cag(30,nn), cag(31,nn), cag(32,nn),
364 + cag(33,nn), cag(34,nn)
368 OPEN(UNIT=21,FILE='discnew.all',STATUS='OLD',ERR=91)
370 read (21,*) rrr(nn), daq(nn)
373 read (21,*) rrrg(nn), dag(nn)
378 90 PRINT*, 'input - output error'
379 91 PRINT*, 'input - output error #2'
385 =======================================================================
387 Adapted to ROOT macro by A. Dainese - 13/07/2003
388 Ported to class by C. Loizides - 12/02/2004
389 New version for extended R values added - 06/03/2004
392 Int_t AliQuenchingWeights::CalcMult(Int_t ipart, Double_t rrrr,Double_t xxxx,
393 Double_t &continuous,Double_t &discrete) const
395 // Calculate Multiple Scattering approx.
396 // weights for given parton type,
397 // rrrr=0.5*q*L^3 and xxxx=w/wc, wc=0.5*q*L^2
403 //read-in data before first call
405 Error("CalcMult","Tables are not loaded.");
409 Error("CalcMult","Tables are not loaded for Multiple Scattering.");
413 Double_t rrin = rrrr;
414 Double_t xxin = xxxx;
416 if(xxin>fxx[260]) return -1;
417 Int_t nxlow = (Int_t)(xxin/0.01) + 1;
418 Int_t nxhigh = nxlow + 1;
419 Double_t xfraclow = (fxx[nxhigh-1]-xxin)/0.01;
420 Double_t xfrachigh = (xxin - fxx[nxlow-1])/0.01;
423 if(rrin<=frrr[33]) rrin = 1.05*frrr[33]; // AD
424 if(rrin>=frrr[0]) rrin = 0.95*frrr[0]; // AD
426 Int_t nrlow=0,nrhigh=0;
427 Double_t rrhigh=0,rrlow=0;
428 for(Int_t nr=1; nr<=34; nr++) {
429 if(rrin<frrr[nr-1]) {
432 rrhigh = frrr[nr-1-1];
442 Double_t rfraclow = (rrhigh-rrin)/(rrhigh-rrlow);
443 Double_t rfrachigh = (rrin-rrlow)/(rrhigh-rrlow);
446 rfraclow = TMath::Log2(rrhigh/rrin)/TMath::Log2(rrhigh/rrlow);
447 rfrachigh = TMath::Log2(rrin/rrlow)/TMath::Log2(rrhigh/rrlow);
449 if((ipart==1) && (rrin>=frrr[0]))
456 if((ipart==2) && (rrin>=frrrg[0]))
464 //printf("R = %f,\nRlow = %f, Rhigh = %f,\nRfraclow = %f, Rfrachigh = %f\n",rrin,rrlow,rrhigh,rfraclow,rfrachigh); // AD
466 Double_t clow=0,chigh=0;
468 clow = xfraclow*fcaq[nrlow-1][nxlow-1]+xfrachigh*fcaq[nrlow-1][nxhigh-1];
469 chigh = xfraclow*fcaq[nrhigh-1][nxlow-1]+xfrachigh*fcaq[nrhigh-1][nxhigh-1];
471 clow = xfraclow*fcag[nrlow-1][nxlow-1]+xfrachigh*fcag[nrlow-1][nxhigh-1];
472 chigh = xfraclow*fcag[nrhigh-1][nxlow-1]+xfrachigh*fcag[nrhigh-1][nxhigh-1];
475 continuous = rfraclow*clow + rfrachigh*chigh;
476 //printf("rfraclow %f, clow %f, rfrachigh %f, chigh %f,\n continuous %f\n",
477 //rfraclow,clow,rfrachigh,chigh,continuous);
480 discrete = rfraclow*fdaq[nrlow-1] + rfrachigh*fdaq[nrhigh-1];
482 discrete = rfraclow*fdag[nrlow-1] + rfrachigh*fdag[nrhigh-1];
488 Int_t AliQuenchingWeights::InitSingleHard(const Char_t *contall,const Char_t *discall)
490 // read in tables for Single Hard Approx.
491 // path to continuum and to discrete part
493 fTablesLoaded = kFALSE;
497 sprintf(fname,"%s",gSystem->ExpandPathName(contall));
498 //PH ifstream fincont(fname);
499 fstream fincont(fname,ios::in);
500 #if defined(__HP_aCC) || defined(__DECCXX)
501 if(!fincont.rdbuf()->is_open()) return -1;
503 if(!fincont.is_open()) return -1;
507 while(fincont>>fxx[nn]>>fcaq[0][nn]>>fcaq[1][nn]>>fcaq[2][nn]>>fcaq[3][nn]>>
508 fcaq[4][nn]>>fcaq[5][nn]>>fcaq[6][nn]>>fcaq[7][nn]>>fcaq[8][nn]>>
509 fcaq[9][nn]>>fcaq[10][nn]>>fcaq[11][nn]>>fcaq[12][nn]>>
511 fcaq[14][nn]>>fcaq[15][nn]>>fcaq[16][nn]>>fcaq[17][nn]>>
513 fcaq[19][nn]>>fcaq[20][nn]>>fcaq[21][nn]>>fcaq[22][nn]>>
515 fcaq[24][nn]>>fcaq[25][nn]>>fcaq[26][nn]>>fcaq[27][nn]>>
524 while(fincont>>fxxg[nn]>>fcag[0][nn]>>fcag[1][nn]>>fcag[2][nn]>>fcag[3][nn]>>
525 fcag[4][nn]>>fcag[5][nn]>>fcag[6][nn]>>fcag[7][nn]>>fcag[8][nn]>>
526 fcag[9][nn]>>fcag[10][nn]>>fcag[11][nn]>>fcag[12][nn]>>
528 fcag[14][nn]>>fcag[15][nn]>>fcag[16][nn]>>fcag[17][nn]>>
530 fcag[19][nn]>>fcag[20][nn]>>fcag[21][nn]>>fcag[22][nn]>>
532 fcag[24][nn]>>fcag[25][nn]>>fcag[26][nn]>>fcag[27][nn]>>
540 sprintf(fname,"%s",gSystem->ExpandPathName(discall));
541 //PH ifstream findisc(fname);
542 fstream findisc(fname,ios::in);
543 #if defined(__HP_aCC) || defined(__DECCXX)
544 if(!findisc.rdbuf()->is_open()) return -1;
546 if(!findisc.is_open()) return -1;
550 while(findisc>>frrr[nn]>>fdaq[nn]) {
555 while(findisc>>frrrg[nn]>>fdag[nn]) {
561 fTablesLoaded = kTRUE;
566 C***************************************************************************
567 C Quenching Weights for Single Hard Scattering
572 C Carlos A. Salgado and Urs A. Wiedemann, hep-ph/0302184.
574 C Carlos A. Salgado and Urs A. Wiedemann Phys.Rev.Lett.89:092303,2002.
577 C This package contains quenching weights for gluon radiation in the
578 C single hard scattering approximation.
580 C swqlin returns the quenching weight for a quark (ipart=1) or
581 C a gluon (ipart=2) traversing a medium with Debye screening mass mu and
582 C length L. The input values are rrrr=0.5*mu^2*L^2 and xxxx=w/wc, where
583 C wc=0.5*mu^2*L and w is the energy radiated. The output values are
584 C the continuous and discrete (prefactor of the delta function) parts
585 C of the quenching weights.
587 C In order to use this routine, the files contlin.all and disclin.all
588 C need to be in the working directory.
590 C An initialization of the tables is needed by doing call initlin before
593 C Please, send us any comment:
595 C urs.wiedemann@cern.ch
596 C carlos.salgado@cern.ch
599 C-------------------------------------------------------------------
602 SUBROUTINE swqlin(ipart,rrrr,xxxx,continuous,discrete)
604 REAL*8 xx(400), dalq(30), calq(30,261), rrr(30)
605 COMMON /datalinqua/ xx, dalq, calq, rrr
607 REAL*8 xxlg(400), dalg(30), calg(30,261), rrrlg(30)
608 COMMON /datalinglu/ xxlg, dalg, calg, rrrlg
610 REAL*8 rrrr,xxxx, continuous, discrete
612 INTEGER nrlow, nrhigh, nxlow, nxhigh
613 REAL*8 rrhigh, rrlow, rfraclow, rfrachigh
614 REAL*8 xfraclow, xfrachigh
620 nxlow = int(xxin/0.038) + 1
622 xfraclow = (xx(nxhigh)-xxin)/0.038
623 xfrachigh = (xxin - xx(nxlow))/0.038
626 if (rrin.lt.rrr(nr)) then
638 rfraclow = (rrhigh-rrin)/(rrhigh-rrlow)
639 rfrachigh = (rrin-rrlow)/(rrhigh-rrlow)
642 clow = xfraclow*calq(nrlow,nxlow)+xfrachigh*calq(nrlow,nxhigh)
643 chigh = xfraclow*calq(nrhigh,nxlow)+xfrachigh*calq(nrhigh,nxhigh)
645 clow = xfraclow*calg(nrlow,nxlow)+xfrachigh*calg(nrlow,nxhigh)
646 chigh = xfraclow*calg(nrhigh,nxlow)+xfrachigh*calg(nrhigh,nxhigh)
649 continuous = rfraclow*clow + rfrachigh*chigh
652 discrete = rfraclow*dalq(nrlow) + rfrachigh*dalq(nrhigh)
654 discrete = rfraclow*dalg(nrlow) + rfrachigh*dalg(nrhigh)
660 REAL*8 xxlq(400), dalq(30), calq(30,261), rrr(30)
661 COMMON /datalinqua/ xxlq, dalq, calq, rrr
663 REAL*8 xxlg(400), dalg(30), calg(30,261), rrrlg(30)
664 COMMON /datalinglu/ xxlg, dalg, calg, rrrlg
666 OPEN(UNIT=20,FILE='contlin.all',STATUS='OLD',ERR=90)
668 read (20,*) xxlq(nn), calq(1,nn), calq(2,nn), calq(3,nn),
669 + calq(4,nn), calq(5,nn), calq(6,nn), calq(7,nn), calq(8,nn),
670 + calq(9,nn), calq(10,nn), calq(11,nn), calq(12,nn),
672 + calq(14,nn), calq(15,nn), calq(16,nn), calq(17,nn),
674 + calq(19,nn), calq(20,nn), calq(21,nn), calq(22,nn),
676 + calq(24,nn), calq(25,nn), calq(26,nn), calq(27,nn),
678 + calq(29,nn), calq(30,nn)
681 read (20,*) xxlg(nn), calg(1,nn), calg(2,nn), calg(3,nn),
682 + calg(4,nn), calg(5,nn), calg(6,nn), calg(7,nn), calg(8,nn),
683 + calg(9,nn), calg(10,nn), calg(11,nn), calg(12,nn),
685 + calg(14,nn), calg(15,nn), calg(16,nn), calg(17,nn),
687 + calg(19,nn), calg(20,nn), calg(21,nn), calg(22,nn),
689 + calg(24,nn), calg(25,nn), calg(26,nn), calg(27,nn),
691 + calg(29,nn), calg(30,nn)
695 OPEN(UNIT=21,FILE='disclin.all',STATUS='OLD',ERR=91)
697 read (21,*) rrr(nn), dalq(nn)
700 read (21,*) rrrlg(nn), dalg(nn)
705 90 PRINT*, 'input - output error'
706 91 PRINT*, 'input - output error #2'
711 =======================================================================
713 Ported to class by C. Loizides - 17/02/2004
717 Int_t AliQuenchingWeights::CalcSingleHard(Int_t ipart, Double_t rrrr,Double_t xxxx,
718 Double_t &continuous,Double_t &discrete) const
720 // calculate Single Hard approx.
721 // weights for given parton type,
722 // rrrr=0.5*mu^2*L^2 and xxxx=w/wc, wc=0.5*mu^2*L
724 // read-in data before first call
726 Error("CalcSingleHard","Tables are not loaded.");
730 Error("CalcSingleHard","Tables are not loaded for Single Hard Scattering.");
734 Double_t rrin = rrrr;
735 Double_t xxin = xxxx;
737 Int_t nxlow = (Int_t)(xxin/0.038) + 1;
738 Int_t nxhigh = nxlow + 1;
739 Double_t xfraclow = (fxx[nxhigh-1]-xxin)/0.038;
740 Double_t xfrachigh = (xxin - fxx[nxlow-1])/0.038;
743 if(rrin<=frrr[29]) rrin = 1.05*frrr[29]; // AD
744 if(rrin>=frrr[0]) rrin = 0.95*frrr[0]; // AD
746 Int_t nrlow=0,nrhigh=0;
747 Double_t rrhigh=0,rrlow=0;
748 for(Int_t nr=1; nr<=30; nr++) {
749 if(rrin<frrr[nr-1]) {
752 rrhigh = frrr[nr-1-1];
762 Double_t rfraclow = (rrhigh-rrin)/(rrhigh-rrlow);
763 Double_t rfrachigh = (rrin-rrlow)/(rrhigh-rrlow);
765 //printf("R = %f,\nRlow = %f, Rhigh = %f,\nRfraclow = %f, Rfrachigh = %f\n",rrin,rrlow,rrhigh,rfraclow,rfrachigh); // AD
767 Double_t clow=0,chigh=0;
769 clow = xfraclow*fcaq[nrlow-1][nxlow-1]+xfrachigh*fcaq[nrlow-1][nxhigh-1];
770 chigh = xfraclow*fcaq[nrhigh-1][nxlow-1]+xfrachigh*fcaq[nrhigh-1][nxhigh-1];
772 clow = xfraclow*fcag[nrlow-1][nxlow-1]+xfrachigh*fcag[nrlow-1][nxhigh-1];
773 chigh = xfraclow*fcag[nrhigh-1][nxlow-1]+xfrachigh*fcag[nrhigh-1][nxhigh-1];
776 continuous = rfraclow*clow + rfrachigh*chigh;
777 //printf("rfraclow %f, clow %f, rfrachigh %f, chigh %f,\n continuous %f\n",
778 // rfraclow,clow,rfrachigh,chigh,continuous);
781 discrete = rfraclow*fdaq[nrlow-1] + rfrachigh*fdaq[nrhigh-1];
783 discrete = rfraclow*fdag[nrlow-1] + rfrachigh*fdag[nrhigh-1];
789 Int_t AliQuenchingWeights::CalcMult(Int_t ipart,
790 Double_t w,Double_t qtransp,Double_t length,
791 Double_t &continuous,Double_t &discrete) const
793 // Calculate Multiple Scattering approx.
794 // weights for given parton type,
795 // rrrr=0.5*q*L^3 and xxxx=w/wc, wc=0.5*q*L^2
797 Double_t wc=CalcWC(qtransp,length);
798 Double_t rrrr=CalcR(wc,length);
800 return CalcMult(ipart,rrrr,xxxx,continuous,discrete);
803 Int_t AliQuenchingWeights::CalcSingleHard(Int_t ipart,
804 Double_t w,Double_t mu,Double_t length,
805 Double_t &continuous,Double_t &discrete) const
807 // calculate Single Hard approx.
808 // weights for given parton type,
809 // rrrr=0.5*mu^2*L^2 and xxxx=w/wc, wc=0.5*mu^2*L
811 Double_t wcbar=CalcWCbar(mu,length);
812 Double_t rrrr=CalcR(wcbar,length);
813 Double_t xxxx=w/wcbar;
814 return CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete);
817 Double_t AliQuenchingWeights::CalcR(Double_t wc, Double_t l) const
819 //calculate R value and
820 //check if it is less then maximum
822 Double_t R = wc*l*fgkConvFmToInvGeV;
824 Warning("CalcR","Value of R = %.2f; should be less than %.2f",R,fgkRMax);
830 Double_t AliQuenchingWeights::CalcRk(Double_t k, Double_t I0, Double_t I1) const
832 //calculate R value and
833 //check if it is less then maximum
835 Double_t R = fgkRMax-1;
839 Warning("CalcRk","Value of R = %.2f; should be less than %.2f",R,fgkRMax);
845 Double_t AliQuenchingWeights::GetELossRandom(Int_t ipart, Double_t length, Double_t e) const
847 // return DeltaE for MS or SH scattering
848 // for given parton type, length and energy
849 // Dependant on ECM (energy constraint method)
850 // e is used to determine where to set bins to zero.
853 Fatal("GetELossRandom","Call SampleEnergyLoss method before!");
856 if((ipart<1) || (ipart>2)) {
857 Fatal("GetELossRandom","ipart =%d; but has to be 1 (quark) or 2 (gluon)",ipart);
861 Int_t l=GetIndex(length);
864 if(fECMethod==kReweight){
868 ret=fHistos[ipart-1][l-1]->GetRandom();
870 Warning("GetELossRandom",
871 "Aborted reweighting; maximum loss assigned after 1e6 trials.");
878 Double_t ret=fHistos[ipart-1][l-1]->GetRandom();
883 Double_t AliQuenchingWeights::CalcQuenchedEnergy(Int_t ipart, Double_t length, Double_t e) const
885 //return quenched parton energy
886 //for given parton type, length and energy
888 Double_t loss=GetELossRandom(ipart,length,e);
892 Double_t AliQuenchingWeights::GetELossRandom(Int_t ipart, TH1F *hell, Double_t e) const
894 // return DeltaE for MS or SH scattering
895 // for given parton type, length distribution and energy
896 // Dependant on ECM (energy constraint method)
897 // e is used to determine where to set bins to zero.
900 Warning("GetELossRandom","Pointer to length distribution is NULL.");
903 Double_t ell=hell->GetRandom();
904 return GetELossRandom(ipart,ell,e);
907 Double_t AliQuenchingWeights::CalcQuenchedEnergy(Int_t ipart, TH1F *hell, Double_t e) const
909 //return quenched parton energy
910 //for given parton type, length distribution and energy
912 Double_t loss=GetELossRandom(ipart,hell,e);
916 Double_t AliQuenchingWeights::GetELossRandomK(Int_t ipart, Double_t I0, Double_t I1, Double_t e)
918 // return DeltaE for new dynamic version
919 // for given parton type, I0 and I1 value and energy
920 // Dependant on ECM (energy constraint method)
921 // e is used to determine where to set bins to zero.
923 // read-in data before first call
925 Fatal("GetELossRandomK","Tables are not loaded.");
928 if((ipart<1) || (ipart>2)) {
929 Fatal("GetELossRandomK","ipart =%d; but has to be 1 (quark) or 2 (gluon)",ipart);
933 Double_t r=CalcRk(I0,I1);
935 Fatal("GetELossRandomK","R should not be negative");
938 Double_t wc=CalcWCk(I1);
940 Fatal("GetELossRandomK","wc should be greater than zero");
943 if(SampleEnergyLoss(ipart,r)!=0){
944 Fatal("GetELossRandomK","Could not sample energy loss");
948 if(fECMethod==kReweight){
952 ret=fHisto->GetRandom();
954 Warning("GetELossRandomK",
955 "Aborted reweighting; maximum loss assigned after 1e6 trials.");
963 Double_t ret=fHisto->GetRandom()*wc;
968 Double_t AliQuenchingWeights::CalcQuenchedEnergyK(Int_t ipart, Double_t I0, Double_t I1, Double_t e)
970 //return quenched parton energy
971 //for given parton type, I0 and I1 value and energy
973 Double_t loss=GetELossRandomK(ipart,I0,I1,e);
977 Double_t AliQuenchingWeights::GetELossRandomKFast(Int_t ipart, Double_t I0, Double_t I1, Double_t e)
979 // return DeltaE for new dynamic version
980 // for given parton type, I0 and I1 value and energy
981 // Dependant on ECM (energy constraint method)
982 // e is used to determine where to set bins to zero.
983 // method is optimized and should only be used if
984 // all parameters are well within the bounds.
985 // read-in data tables before first call
987 Double_t r=CalcRk(I0,I1);
992 Double_t wc=CalcWCk(I1);
997 return GetELossRandomKFastR(ipart,r,wc,e);
1000 Double_t AliQuenchingWeights::GetELossRandomKFastR(Int_t ipart, Double_t r, Double_t wc, Double_t e)
1002 // return DeltaE for new dynamic version
1003 // for given parton type, R and wc value and energy
1004 // Dependant on ECM (energy constraint method)
1005 // e is used to determine where to set bins to zero.
1006 // method is optimized and should only be used if
1007 // all parameters are well within the bounds.
1008 // read-in data tables before first call
1014 Double_t discrete=0.;
1015 Double_t continuous=0.;
1017 Double_t xxxx = fHisto->GetBinCenter(bin);
1019 CalcMult(ipart,r,xxxx,continuous,discrete);
1021 CalcSingleHard(ipart,r,xxxx,continuous,discrete);
1024 return 0.; //no energy loss
1027 fHisto->SetBinContent(bin,continuous);
1028 Int_t kbinmax=fHisto->FindBin(e/wc);
1029 if(kbinmax>=fgkBins) kbinmax=fgkBins-1;
1030 if(kbinmax==1) return e; //maximum energy loss
1033 for(Int_t bin=2; bin<=kbinmax; bin++) {
1034 xxxx = fHisto->GetBinCenter(bin);
1035 CalcMult(ipart,r,xxxx,continuous,discrete);
1036 fHisto->SetBinContent(bin,continuous);
1039 for(Int_t bin=2; bin<=kbinmax; bin++) {
1040 xxxx = fHisto->GetBinCenter(bin);
1041 CalcSingleHard(ipart,r,xxxx,continuous,discrete);
1042 fHisto->SetBinContent(bin,continuous);
1046 if(fECMethod==kReweight){
1047 fHisto->SetBinContent(kbinmax+1,0);
1048 fHisto->Fill(0.,discrete*fgkBins/fgkMaxBin);
1049 } else if (fECMethod==kReweightCont) {
1050 fHisto->SetBinContent(kbinmax+1,0);
1051 const Double_t kdelta=fHisto->Integral(1,kbinmax);
1052 fHisto->Scale(1./kdelta*(1-discrete));
1053 fHisto->Fill(0.,discrete);
1055 const Double_t kdelta=fHisto->Integral(1,kbinmax);
1056 Double_t val=discrete*fgkBins/fgkMaxBin;
1057 fHisto->Fill(0.,val);
1058 fHisto->SetBinContent(kbinmax+1,(1-discrete)*fgkBins/fgkMaxBin-kdelta);
1060 for(Int_t bin=kbinmax+2; bin<=fgkBins; bin++) {
1061 fHisto->SetBinContent(bin,0);
1063 //cout << kbinmax << " " << discrete << " " << fHisto->Integral() << endl;
1064 Double_t ret=fHisto->GetRandom()*wc;
1069 Double_t AliQuenchingWeights::CalcQuenchedEnergyKFast(Int_t ipart, Double_t I0, Double_t I1, Double_t e)
1071 //return quenched parton energy (fast method)
1072 //for given parton type, I0 and I1 value and energy
1074 Double_t loss=GetELossRandomKFast(ipart,I0,I1,e);
1078 Double_t AliQuenchingWeights::GetDiscreteWeight(Int_t ipart, Double_t I0, Double_t I1)
1080 // return discrete weight
1082 Double_t r=CalcRk(I0,I1);
1086 return GetDiscreteWeightR(ipart,r);
1089 Double_t AliQuenchingWeights::GetDiscreteWeightR(Int_t ipart, Double_t r)
1091 // return discrete weight
1097 Double_t discrete=0.;
1098 Double_t continuous=0.;
1100 Double_t xxxx = fHisto->GetBinCenter(bin);
1102 CalcMult(ipart,r,xxxx,continuous,discrete);
1104 CalcSingleHard(ipart,r,xxxx,continuous,discrete);
1108 void AliQuenchingWeights::GetZeroLossProb(Double_t &p,Double_t &prw,Double_t &prwcont,
1109 Int_t ipart,Double_t I0,Double_t I1,Double_t e)
1111 //calculate the probabilty that there is no energy
1112 //loss for different ways of energy constraint
1113 p=1.;prw=1.;prwcont=1.;
1114 Double_t r=CalcRk(I0,I1);
1118 Double_t wc=CalcWCk(I1);
1122 GetZeroLossProbR(p,prw,prwcont,ipart,r,wc,e);
1125 void AliQuenchingWeights::GetZeroLossProbR(Double_t &p,Double_t &prw,Double_t &prwcont,
1126 Int_t ipart, Double_t r,Double_t wc,Double_t e)
1128 //calculate the probabilty that there is no energy
1129 //loss for different ways of energy constraint
1134 Double_t discrete=0.;
1135 Double_t continuous=0.;
1137 Int_t kbinmax=fHisto->FindBin(e/wc);
1138 if(kbinmax>=fgkBins) kbinmax=fgkBins-1;
1140 for(Int_t bin=1; bin<=kbinmax; bin++) {
1141 Double_t xxxx = fHisto->GetBinCenter(bin);
1142 CalcMult(ipart,r,xxxx,continuous,discrete);
1143 fHisto->SetBinContent(bin,continuous);
1146 for(Int_t bin=1; bin<=kbinmax; bin++) {
1147 Double_t xxxx = fHisto->GetBinCenter(bin);
1148 CalcSingleHard(ipart,r,xxxx,continuous,discrete);
1149 fHisto->SetBinContent(bin,continuous);
1153 //non-reweighted P(Delta E = 0)
1154 const Double_t kdelta=fHisto->Integral(1,kbinmax);
1155 Double_t val=discrete*fgkBins/fgkMaxBin;
1156 fHisto->Fill(0.,val);
1157 fHisto->SetBinContent(kbinmax+1,(1-discrete)*fgkBins/fgkMaxBin-kdelta);
1158 Double_t hint=fHisto->Integral(1,kbinmax+1);
1159 p=fHisto->GetBinContent(1)/hint;
1162 hint=fHisto->Integral(1,kbinmax);
1163 prw=fHisto->GetBinContent(1)/hint;
1165 Double_t xxxx = fHisto->GetBinCenter(1);
1166 CalcMult(ipart,r,xxxx,continuous,discrete);
1167 fHisto->SetBinContent(1,continuous);
1168 hint=fHisto->Integral(1,kbinmax);
1169 fHisto->Scale(1./hint*(1-discrete));
1170 fHisto->Fill(0.,discrete);
1171 prwcont=fHisto->GetBinContent(1);
1174 Int_t AliQuenchingWeights::SampleEnergyLoss()
1176 // Has to be called to fill the histograms
1178 // For stored values fQTransport loop over
1179 // particle type and length = 1 to fMaxLength (fm)
1180 // to fill energy loss histos
1182 // Take histogram of continuous weights
1183 // Take discrete_weight
1184 // If discrete_weight > 1, put all channels to 0, except channel 1
1185 // Fill channel 1 with discrete_weight/(1-discrete_weight)*integral
1187 // read-in data before first call
1189 Error("SampleEnergyLoss","Tables are not loaded.");
1194 Int_t lmax=CalcLengthMax(fQTransport);
1195 if(fLengthMax>lmax){
1196 Info("SampleEnergyLoss","Maximum length changed from %d to %d;\nin order to have R < %.f",fLengthMax,lmax,fgkRMax);
1200 Warning("SampleEnergyLoss","Maximum length not checked,\nbecause SingeHard is not yet tested.");
1204 fHistos=new TH1F**[2];
1205 fHistos[0]=new TH1F*[4*fLengthMax];
1206 fHistos[1]=new TH1F*[4*fLengthMax];
1207 fLengthMaxOld=fLengthMax; //remember old value in case
1208 //user wants to reset
1211 Char_t meddesc[100];
1213 medvalue=(Int_t)(fQTransport*1000.);
1214 sprintf(meddesc,"MS");
1216 medvalue=(Int_t)(fMu*1000.);
1217 sprintf(meddesc,"SH");
1220 for(Int_t ipart=1;ipart<=2;ipart++){
1221 for(Int_t l=1;l<=4*fLengthMax;l++){
1223 sprintf(hname,"hDisc-ContQW_%s_%d_%d_%d_%d",meddesc,fInstanceNumber,ipart,medvalue,l);
1225 Double_t wc = CalcWC(len);
1226 fHistos[ipart-1][l-1] = new TH1F(hname,hname,fgkBins,0.,fgkMaxBin*wc);
1227 fHistos[ipart-1][l-1]->SetXTitle("#Delta E [GeV]");
1228 fHistos[ipart-1][l-1]->SetYTitle("p(#Delta E)");
1229 fHistos[ipart-1][l-1]->SetLineColor(4);
1231 Double_t rrrr = CalcR(wc,len);
1232 Double_t discrete=0.;
1233 // loop on histogram channels
1234 for(Int_t bin=1; bin<=fgkBins; bin++) {
1235 Double_t xxxx = fHistos[ipart-1][l-1]->GetBinCenter(bin)/wc;
1236 Double_t continuous;
1238 CalcMult(ipart,rrrr,xxxx,continuous,discrete);
1240 CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete);
1241 fHistos[ipart-1][l-1]->SetBinContent(bin,continuous);
1243 // add discrete part to distribution
1245 for(Int_t bin=2;bin<=fgkBins;bin++)
1246 fHistos[ipart-1][l-1]->SetBinContent(bin,0.);
1248 Double_t val=discrete/(1.-discrete)*fHistos[ipart-1][l-1]->Integral(1,fgkBins);
1249 fHistos[ipart-1][l-1]->Fill(0.,val);
1251 Double_t hint=fHistos[ipart-1][l-1]->Integral(1,fgkBins);
1252 fHistos[ipart-1][l-1]->Scale(1./hint);
1258 Int_t AliQuenchingWeights::SampleEnergyLoss(Int_t ipart, Double_t r)
1260 // Sample energy loss directly for one particle type
1261 // choses R (safe it and keep it until next call of function)
1263 // read-in data before first call
1265 Error("SampleEnergyLoss","Tables are not loaded.");
1269 Double_t discrete=0.;
1270 Double_t continuous=0;;
1272 Double_t xxxx = fHisto->GetBinCenter(bin);
1274 CalcMult(ipart,r,xxxx,continuous,discrete);
1276 CalcSingleHard(ipart,r,xxxx,continuous,discrete);
1279 fHisto->SetBinContent(1,1.);
1280 for(Int_t bin=2;bin<=fgkBins;bin++)
1281 fHisto->SetBinContent(bin,0.);
1285 fHisto->SetBinContent(bin,continuous);
1286 for(Int_t bin=2; bin<=fgkBins; bin++) {
1287 xxxx = fHisto->GetBinCenter(bin);
1289 CalcMult(ipart,r,xxxx,continuous,discrete);
1291 CalcSingleHard(ipart,r,xxxx,continuous,discrete);
1292 fHisto->SetBinContent(bin,continuous);
1295 Double_t val=discrete/(1.-discrete)*fHisto->Integral(1,fgkBins);
1296 fHisto->Fill(0.,val);
1297 Double_t hint=fHisto->Integral(1,fgkBins);
1299 fHisto->Scale(1./hint);
1301 //cout << discrete << " " << hint << " " << continuous << endl;
1307 const TH1F* AliQuenchingWeights::GetHisto(Int_t ipart,Double_t length) const
1309 //return quenching histograms
1310 //for ipart and length
1313 Fatal("GetELossRandom","Call SampleEnergyLoss method before!");
1316 if((ipart<1) || (ipart>2)) {
1317 Fatal("GetELossRandom","ipart =%d; but has to be 1 (quark) or 2 (gluon)",ipart);
1321 Int_t l=GetIndex(length);
1323 return fHistos[ipart-1][l-1];
1326 TH1F* AliQuenchingWeights::ComputeQWHisto(Int_t ipart,Double_t medval,Double_t length) const
1328 // ipart = 1 for quark, 2 for gluon
1329 // medval a) qtransp = transport coefficient (GeV^2/fm)
1330 // b) mu = Debye mass (GeV)
1331 // length = path length in medium (fm)
1332 // Get from SW tables:
1333 // - continuous weight, as a function of dE/wc
1336 Char_t meddesc[100];
1338 wc=CalcWC(medval,length);
1339 sprintf(meddesc,"MS");
1341 wc=CalcWCbar(medval,length);
1342 sprintf(meddesc,"SH");
1346 sprintf(hname,"hContQWHisto_%s_%d_%d_%d",meddesc,ipart,
1347 (Int_t)(medval*1000.),(Int_t)length);
1349 TH1F *hist = new TH1F("hist",hname,fgkBins,0.,fgkMaxBin*wc);
1350 hist->SetXTitle("#Delta E [GeV]");
1351 hist->SetYTitle("p(#Delta E)");
1352 hist->SetLineColor(4);
1354 Double_t rrrr = CalcR(wc,length);
1355 //loop on histogram channels
1356 for(Int_t bin=1; bin<=fgkBins; bin++) {
1357 Double_t xxxx = hist->GetBinCenter(bin)/wc;
1358 Double_t continuous,discrete;
1360 if(fMultSoft) ret=CalcMult(ipart,rrrr,xxxx,continuous,discrete);
1361 else ret=CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete);
1366 hist->SetBinContent(bin,continuous);
1371 TH1F* AliQuenchingWeights::ComputeQWHistoX(Int_t ipart,Double_t medval,Double_t length) const
1373 // ipart = 1 for quark, 2 for gluon
1374 // medval a) qtransp = transport coefficient (GeV^2/fm)
1375 // b) mu = Debye mass (GeV)
1376 // length = path length in medium (fm)
1377 // Get from SW tables:
1378 // - continuous weight, as a function of dE/wc
1381 Char_t meddesc[100];
1383 wc=CalcWC(medval,length);
1384 sprintf(meddesc,"MS");
1386 wc=CalcWCbar(medval,length);
1387 sprintf(meddesc,"SH");
1391 sprintf(hname,"hContQWHistox_%s_%d_%d_%d",meddesc,ipart,
1392 (Int_t)(medval*1000.),(Int_t)length);
1394 TH1F *histx = new TH1F("histx",hname,fgkBins,0.,fgkMaxBin);
1395 histx->SetXTitle("x = #Delta E/#omega_{c}");
1397 histx->SetYTitle("p(#Delta E/#omega_{c})");
1399 histx->SetYTitle("p(#Delta E/#bar#omega_{c})");
1400 histx->SetLineColor(4);
1402 Double_t rrrr = CalcR(wc,length);
1403 //loop on histogram channels
1404 for(Int_t bin=1; bin<=fgkBins; bin++) {
1405 Double_t xxxx = histx->GetBinCenter(bin);
1406 Double_t continuous,discrete;
1408 if(fMultSoft) ret=CalcMult(ipart,rrrr,xxxx,continuous,discrete);
1409 else ret=CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete);
1414 histx->SetBinContent(bin,continuous);
1419 TH1F* AliQuenchingWeights::ComputeQWHistoX(Int_t ipart,Double_t r) const
1421 // compute P(E) distribution for
1422 // given ipart = 1 for quark, 2 for gluon
1425 Char_t meddesc[100];
1427 sprintf(meddesc,"MS");
1429 sprintf(meddesc,"SH");
1433 sprintf(hname,"hQWHistox_%s_%d_%.2f",meddesc,ipart,r);
1434 TH1F *histx = new TH1F("histx",hname,fgkBins,0.,fgkMaxBin);
1435 histx->SetXTitle("x = #Delta E/#omega_{c}");
1437 histx->SetYTitle("p(#Delta E/#omega_{c})");
1439 histx->SetYTitle("p(#Delta E/#bar#omega_{c})");
1440 histx->SetLineColor(4);
1443 Double_t continuous=0.,discrete=0.;
1444 //loop on histogram channels
1445 for(Int_t bin=1; bin<=fgkBins; bin++) {
1446 Double_t xxxx = histx->GetBinCenter(bin);
1448 if(fMultSoft) ret=CalcMult(ipart,rrrr,xxxx,continuous,discrete);
1449 else ret=CalcSingleHard(ipart,rrrr,xxxx,continuous,discrete);
1454 histx->SetBinContent(bin,continuous);
1457 //add discrete part to distribution
1459 for(Int_t bin=2;bin<=fgkBins;bin++)
1460 histx->SetBinContent(bin,0.);
1462 Double_t val=discrete/(1.-discrete)*histx->Integral(1,fgkBins);
1463 histx->Fill(0.,val);
1465 Double_t hint=histx->Integral(1,fgkBins);
1466 if(hint!=0) histx->Scale(1./hint);
1471 TH1F* AliQuenchingWeights::ComputeELossHisto(Int_t ipart,Double_t medval,Double_t l,Double_t e) const
1473 // compute energy loss histogram for
1474 // parton type, medium value, length and energy
1476 AliQuenchingWeights *dummy=new AliQuenchingWeights(*this);
1478 dummy->SetQTransport(medval);
1481 dummy->SetMu(medval);
1482 dummy->InitSingleHard();
1484 dummy->SampleEnergyLoss();
1489 sprintf(name,"Energy Loss Distribution - Quarks;E_{loss} (GeV);#");
1490 sprintf(hname,"hLossQuarks");
1492 sprintf(name,"Energy Loss Distribution - Gluons;E_{loss} (GeV);#");
1493 sprintf(hname,"hLossGluons");
1496 TH1F *h = new TH1F(hname,name,250,0,250);
1497 for(Int_t i=0;i<100000;i++){
1498 //if(i % 1000 == 0) cout << "." << flush;
1499 Double_t loss=dummy->GetELossRandom(ipart,l,e);
1507 TH1F* AliQuenchingWeights::ComputeELossHisto(Int_t ipart,Double_t medval,TH1F *hEll,Double_t e) const
1509 // compute energy loss histogram for
1510 // parton type, medium value,
1511 // length distribution and energy
1513 AliQuenchingWeights *dummy=new AliQuenchingWeights(*this);
1515 dummy->SetQTransport(medval);
1518 dummy->SetMu(medval);
1519 dummy->InitSingleHard();
1521 dummy->SampleEnergyLoss();
1526 sprintf(name,"Energy Loss Distribution - Quarks;E_{loss} (GeV);#");
1527 sprintf(hname,"hLossQuarks");
1529 sprintf(name,"Energy Loss Distribution - Gluons;E_{loss} (GeV);#");
1530 sprintf(hname,"hLossGluons");
1533 TH1F *h = new TH1F(hname,name,250,0,250);
1534 for(Int_t i=0;i<100000;i++){
1535 //if(i % 1000 == 0) cout << "." << flush;
1536 Double_t loss=dummy->GetELossRandom(ipart,hEll,e);
1544 TH1F* AliQuenchingWeights::ComputeELossHisto(Int_t ipart,Double_t r) const
1546 // compute energy loss histogram for
1547 // parton type and given R
1549 TH1F *dummy = ComputeQWHistoX(ipart,r);
1550 if(!dummy) return 0;
1553 sprintf(hname,"hELossHistox_%d_%.2f",ipart,r);
1554 TH1F *histx = new TH1F("histxr",hname,fgkBins,0.,fgkMaxBin);
1555 for(Int_t i=0;i<100000;i++){
1556 //if(i % 1000 == 0) cout << "." << flush;
1557 Double_t loss=dummy->GetRandom();
1564 Double_t AliQuenchingWeights::GetMeanELoss(Int_t ipart,Double_t medval,Double_t l) const
1566 // compute average energy loss for
1567 // parton type, medium value, length and energy
1569 TH1F *dummy = ComputeELossHisto(ipart,medval,l);
1570 if(!dummy) return 0;
1571 Double_t ret=dummy->GetMean();
1576 Double_t AliQuenchingWeights::GetMeanELoss(Int_t ipart,Double_t medval,TH1F *hEll) const
1578 // compute average energy loss for
1579 // parton type, medium value,
1580 // length distribution and energy
1582 TH1F *dummy = ComputeELossHisto(ipart,medval,hEll);
1583 if(!dummy) return 0;
1584 Double_t ret=dummy->GetMean();
1589 Double_t AliQuenchingWeights::GetMeanELoss(Int_t ipart,Double_t r) const
1591 // compute average energy loss over wc
1592 // for parton type and given R
1594 TH1F *dummy = ComputeELossHisto(ipart,r);
1595 if(!dummy) return 0;
1596 Double_t ret=dummy->GetMean();
1601 void AliQuenchingWeights::PlotDiscreteWeights(Double_t len,Double_t qm) const
1603 // plot discrete weights for given length
1607 c = new TCanvas("cdiscms","Discrete Weight for Multiple Scattering",0,0,500,400);
1609 c = new TCanvas("cdiscsh","Discrete Weight for Single Hard Scattering",0,0,500,400);
1612 TH2F *hframe = new TH2F("hdisc","",2,0,qm+.1,2,0,1.25);
1613 hframe->SetStats(0);
1615 hframe->SetXTitle("#hat{q} [GeV^{2}/fm]");
1617 hframe->SetXTitle("#mu [GeV]");
1618 //hframe->SetYTitle("Probability #Delta E = 0 , p_{0}");
1619 hframe->SetYTitle("p_{0} (discrete weight)");
1622 Int_t points=(Int_t)qm*4;
1623 TGraph *gq=new TGraph(points);
1626 for(Double_t q=0.05;q<=qm+.05;q+=0.25){
1628 CalcMult(1,1.0,q,len,cont,disc);
1629 gq->SetPoint(i,q,disc);i++;
1632 for(Double_t m=0.05;m<=qm+.05;m+=0.25){
1634 CalcSingleHard(1,1.0,m,len,cont, disc);
1635 gq->SetPoint(i,m,disc);i++;
1638 gq->SetMarkerStyle(20);
1639 gq->SetMarkerColor(1);
1640 gq->SetLineStyle(1);
1641 gq->SetLineColor(1);
1644 TGraph *gg=new TGraph(points);
1647 for(Double_t q=0.05;q<=qm+.05;q+=0.25){
1649 CalcMult(2,1.0,q,len,cont,disc);
1650 gg->SetPoint(i,q,disc);i++;
1653 for(Double_t m=0.05;m<=qm+.05;m+=0.25){
1655 CalcSingleHard(2,1.0,m,len,cont,disc);
1656 gg->SetPoint(i,m,disc);i++;
1659 gg->SetMarkerStyle(24);
1660 gg->SetMarkerColor(2);
1661 gg->SetLineStyle(2);
1662 gg->SetLineColor(2);
1665 TLegend *l1a = new TLegend(0.5,0.6,.95,0.8);
1666 l1a->SetFillStyle(0);
1667 l1a->SetBorderSize(0);
1669 sprintf(label,"L = %.1f fm",len);
1670 l1a->AddEntry(gq,label,"");
1671 l1a->AddEntry(gq,"quark projectile","l");
1672 l1a->AddEntry(gg,"gluon projectile","l");
1678 void AliQuenchingWeights::PlotContWeights(Int_t itype,Double_t ell) const
1680 // plot continous weights for
1681 // given parton type and length
1688 sprintf(title,"Cont. Weight for Multiple Scattering - Quarks");
1690 sprintf(title,"Cont. Weight for Multiple Scattering - Gluons");
1692 medvals[0]=4;medvals[1]=1;medvals[2]=0.5;
1693 sprintf(name,"ccont-ms-%d",itype);
1696 sprintf(title,"Cont. Weight for Single Hard Scattering - Quarks");
1698 sprintf(title,"Cont. Weight for Single Hard Scattering - Gluons");
1700 medvals[0]=2;medvals[1]=1;medvals[2]=0.5;
1701 sprintf(name,"ccont-ms-%d",itype);
1704 TCanvas *c = new TCanvas(name,title,0,0,500,400);
1706 TH1F *h1=ComputeQWHisto(itype,medvals[0],ell);
1708 h1->SetTitle(title);
1710 h1->SetLineColor(1);
1712 TH1F *h2=ComputeQWHisto(itype,medvals[1],ell);
1714 h2->SetLineColor(2);
1715 h2->DrawCopy("SAME");
1716 TH1F *h3=ComputeQWHisto(itype,medvals[2],ell);
1718 h3->SetLineColor(3);
1719 h3->DrawCopy("SAME");
1721 TLegend *l1a = new TLegend(0.5,0.6,.95,0.8);
1722 l1a->SetFillStyle(0);
1723 l1a->SetBorderSize(0);
1725 sprintf(label,"L = %.1f fm",ell);
1726 l1a->AddEntry(h1,label,"");
1728 sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medvals[0]);
1729 l1a->AddEntry(h1,label,"pl");
1730 sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medvals[1]);
1731 l1a->AddEntry(h2,label,"pl");
1732 sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medvals[2]);
1733 l1a->AddEntry(h3,label,"pl");
1735 sprintf(label,"#mu = %.1f GeV",medvals[0]);
1736 l1a->AddEntry(h1,label,"pl");
1737 sprintf(label,"#mu = %.1f GeV",medvals[1]);
1738 l1a->AddEntry(h2,label,"pl");
1739 sprintf(label,"#mu = %.1f GeV",medvals[2]);
1740 l1a->AddEntry(h3,label,"pl");
1747 void AliQuenchingWeights::PlotContWeightsVsL(Int_t itype,Double_t medval) const
1749 // plot continous weights for
1750 // given parton type and medium value
1756 sprintf(title,"Cont. Weight for Multiple Scattering - Quarks");
1758 sprintf(title,"Cont. Weight for Multiple Scattering - Gluons");
1760 sprintf(name,"ccont2-ms-%d",itype);
1763 sprintf(title,"Cont. Weight for Single Hard Scattering - Quarks");
1765 sprintf(title,"Cont. Weight for Single Hard Scattering - Gluons");
1767 sprintf(name,"ccont2-sh-%d",itype);
1769 TCanvas *c = new TCanvas(name,title,0,0,500,400);
1771 TH1F *h1=ComputeQWHisto(itype,medval,8);
1773 h1->SetTitle(title);
1775 h1->SetLineColor(1);
1777 TH1F *h2=ComputeQWHisto(itype,medval,5);
1779 h2->SetLineColor(2);
1780 h2->DrawCopy("SAME");
1781 TH1F *h3=ComputeQWHisto(itype,medval,2);
1783 h3->SetLineColor(3);
1784 h3->DrawCopy("SAME");
1786 TLegend *l1a = new TLegend(0.5,0.6,.95,0.8);
1787 l1a->SetFillStyle(0);
1788 l1a->SetBorderSize(0);
1791 sprintf(label,"#hat{q} = %.1f GeV^{2}/fm",medval);
1793 sprintf(label,"#mu = %.1f GeV",medval);
1795 l1a->AddEntry(h1,label,"");
1796 l1a->AddEntry(h1,"L = 8 fm","pl");
1797 l1a->AddEntry(h2,"L = 5 fm","pl");
1798 l1a->AddEntry(h3,"L = 2 fm","pl");
1804 void AliQuenchingWeights::PlotAvgELoss(Double_t len,Double_t qm,Double_t e) const
1806 // plot average energy loss for given length
1807 // and parton energy
1810 Error("PlotAvgELoss","Tables are not loaded.");
1817 sprintf(title,"Average Energy Loss for Multiple Scattering");
1818 sprintf(name,"cavgelossms");
1820 sprintf(title,"Average Energy Loss for Single Hard Scattering");
1821 sprintf(name,"cavgelosssh");
1824 TCanvas *c = new TCanvas(name,title,0,0,500,400);
1826 TH2F *hframe = new TH2F("avgloss","",2,0,qm+.1,2,0,100);
1827 hframe->SetStats(0);
1829 hframe->SetXTitle("#hat{q} [GeV^{2}/fm]");
1831 hframe->SetXTitle("#mu [GeV]");
1832 hframe->SetYTitle("<E_{loss}> [GeV]");
1835 TGraph *gq=new TGraph(20);
1837 for(Double_t v=0.05;v<=qm+.05;v+=0.25){
1838 TH1F *dummy=ComputeELossHisto(1,v,len,e);
1839 Double_t avgloss=dummy->GetMean();
1840 gq->SetPoint(i,v,avgloss);i++;
1843 gq->SetMarkerStyle(21);
1846 Int_t points=(Int_t)qm*4;
1847 TGraph *gg=new TGraph(points);
1849 for(Double_t v=0.05;v<=qm+.05;v+=0.25){
1850 TH1F *dummy=ComputeELossHisto(2,v,len,e);
1851 Double_t avgloss=dummy->GetMean();
1852 gg->SetPoint(i,v,avgloss);i++;
1855 gg->SetMarkerStyle(20);
1856 gg->SetMarkerColor(2);
1859 TGraph *gratio=new TGraph(points);
1860 for(Int_t i=0;i<points;i++){
1862 gg->GetPoint(i,x,y);
1863 gq->GetPoint(i,x2,y2);
1865 gratio->SetPoint(i,x,y/y2*10/2.25);
1866 else gratio->SetPoint(i,x,0);
1868 gratio->SetLineStyle(4);
1870 TLegend *l1a = new TLegend(0.15,0.60,0.50,0.90);
1871 l1a->SetFillStyle(0);
1872 l1a->SetBorderSize(0);
1874 sprintf(label,"L = %.1f fm",len);
1875 l1a->AddEntry(gq,label,"");
1876 l1a->AddEntry(gq,"quark projectile","pl");
1877 l1a->AddEntry(gg,"gluon projectile","pl");
1878 l1a->AddEntry(gratio,"gluon/quark/2.25*10","pl");
1884 void AliQuenchingWeights::PlotAvgELoss(TH1F *hEll,Double_t e) const
1886 // plot average energy loss for given
1887 // length distribution and parton energy
1890 Error("PlotAvgELossVs","Tables are not loaded.");
1897 sprintf(title,"Average Energy Loss for Multiple Scattering");
1898 sprintf(name,"cavgelossms2");
1900 sprintf(title,"Average Energy Loss for Single Hard Scattering");
1901 sprintf(name,"cavgelosssh2");
1904 TCanvas *c = new TCanvas(name,title,0,0,500,400);
1906 TH2F *hframe = new TH2F("havgloss",title,2,0,5.1,2,0,100);
1907 hframe->SetStats(0);
1909 hframe->SetXTitle("#hat{q} [GeV^{2}/fm]");
1911 hframe->SetXTitle("#mu [GeV]");
1912 hframe->SetYTitle("<E_{loss}> [GeV]");
1915 TGraph *gq=new TGraph(20);
1917 for(Double_t v=0.05;v<=5.05;v+=0.25){
1918 TH1F *dummy=ComputeELossHisto(1,v,hEll,e);
1919 Double_t avgloss=dummy->GetMean();
1920 gq->SetPoint(i,v,avgloss);i++;
1923 gq->SetMarkerStyle(20);
1926 TGraph *gg=new TGraph(20);
1928 for(Double_t v=0.05;v<=5.05;v+=0.25){
1929 TH1F *dummy=ComputeELossHisto(2,v,hEll,e);
1930 Double_t avgloss=dummy->GetMean();
1931 gg->SetPoint(i,v,avgloss);i++;
1934 gg->SetMarkerStyle(24);
1937 TGraph *gratio=new TGraph(20);
1938 for(Int_t i=0;i<20;i++){
1940 gg->GetPoint(i,x,y);
1941 gq->GetPoint(i,x2,y2);
1943 gratio->SetPoint(i,x,y/y2*10/2.25);
1944 else gratio->SetPoint(i,x,0);
1946 gratio->SetLineStyle(4);
1949 TLegend *l1a = new TLegend(0.5,0.6,.95,0.8);
1950 l1a->SetFillStyle(0);
1951 l1a->SetBorderSize(0);
1953 sprintf(label,"<L> = %.2f fm",hEll->GetMean());
1954 l1a->AddEntry(gq,label,"");
1955 l1a->AddEntry(gq,"quark","pl");
1956 l1a->AddEntry(gg,"gluon","pl");
1957 //l1a->AddEntry(gratio,"gluon/quark/2.25*10","pl");
1963 void AliQuenchingWeights::PlotAvgELossVsL(Double_t e) const
1965 // plot average energy loss versus ell
1968 Error("PlotAvgELossVsEll","Tables are not loaded.");
1976 sprintf(title,"Average Energy Loss for Multiple Scattering");
1977 sprintf(name,"cavgelosslms");
1980 sprintf(title,"Average Energy Loss for Single Hard Scattering");
1981 sprintf(name,"cavgelosslsh");
1985 TCanvas *c = new TCanvas(name,title,0,0,600,400);
1987 TH2F *hframe = new TH2F("avglossell",title,2,0,fLengthMax,2,0,250);
1988 hframe->SetStats(0);
1989 hframe->SetXTitle("length [fm]");
1990 hframe->SetYTitle("<E_{loss}> [GeV]");
1993 TGraph *gq=new TGraph((Int_t)fLengthMax*4);
1995 for(Double_t v=0.25;v<=fLengthMax;v+=0.25){
1996 TH1F *dummy=ComputeELossHisto(1,medval,v,e);
1997 Double_t avgloss=dummy->GetMean();
1998 gq->SetPoint(i,v,avgloss);i++;
2001 gq->SetMarkerStyle(20);
2004 TGraph *gg=new TGraph((Int_t)fLengthMax*4);
2006 for(Double_t v=0.25;v<=fLengthMax;v+=0.25){
2007 TH1F *dummy=ComputeELossHisto(2,medval,v,e);
2008 Double_t avgloss=dummy->GetMean();
2009 gg->SetPoint(i,v,avgloss);i++;
2012 gg->SetMarkerStyle(24);
2015 TGraph *gratio=new TGraph((Int_t)fLengthMax*4);
2016 for(Int_t i=0;i<=(Int_t)fLengthMax*4;i++){
2018 gg->GetPoint(i,x,y);
2019 gq->GetPoint(i,x2,y2);
2021 gratio->SetPoint(i,x,y/y2*100/2.25);
2022 else gratio->SetPoint(i,x,0);
2024 gratio->SetLineStyle(1);
2025 gratio->SetLineWidth(2);
2027 TLegend *l1a = new TLegend(0.15,0.65,.60,0.85);
2028 l1a->SetFillStyle(0);
2029 l1a->SetBorderSize(0);
2032 sprintf(label,"#hat{q} = %.2f GeV^{2}/fm",medval);
2034 sprintf(label,"#mu = %.2f GeV",medval);
2035 l1a->AddEntry(gq,label,"");
2036 l1a->AddEntry(gq,"quark","pl");
2037 l1a->AddEntry(gg,"gluon","pl");
2038 l1a->AddEntry(gratio,"gluon/quark/2.25*100","pl");
2041 TF1 *f=new TF1("f","100",0,fLengthMax);
2048 void AliQuenchingWeights::PlotAvgELossVsPt(Double_t medval,Double_t len) const
2050 // plot relative energy loss for given
2051 // length and parton energy versus pt
2054 Error("PlotAvgELossVsPt","Tables are not loaded.");
2061 sprintf(title,"Relative Energy Loss for Multiple Scattering");
2062 sprintf(name,"cavgelossvsptms");
2064 sprintf(title,"Relative Energy Loss for Single Hard Scattering");
2065 sprintf(name,"cavgelossvsptsh");
2068 TCanvas *c = new TCanvas(name,title,0,0,500,400);
2070 TH2F *hframe = new TH2F("havglossvspt",title,2,0,100,2,0,1);
2071 hframe->SetStats(0);
2072 hframe->SetXTitle("p_{T} [GeV]");
2073 hframe->SetYTitle("<E_{loss}>/p_{T} [GeV]");
2076 TGraph *gq=new TGraph(40);
2078 for(Double_t pt=2.5;pt<=100.05;pt+=2.5){
2079 TH1F *dummy=ComputeELossHisto(1,medval,len,pt);
2080 Double_t avgloss=dummy->GetMean();
2081 gq->SetPoint(i,pt,avgloss/pt);i++;
2084 gq->SetMarkerStyle(20);
2087 TGraph *gg=new TGraph(40);
2089 for(Double_t pt=2.5;pt<=100.05;pt+=2.5){
2090 TH1F *dummy=ComputeELossHisto(2,medval,len,pt);
2091 Double_t avgloss=dummy->GetMean();
2092 gg->SetPoint(i,pt,avgloss/pt);i++;
2095 gg->SetMarkerStyle(24);
2098 TLegend *l1a = new TLegend(0.5,0.6,.95,0.8);
2099 l1a->SetFillStyle(0);
2100 l1a->SetBorderSize(0);
2102 sprintf(label,"L = %.1f fm",len);
2103 l1a->AddEntry(gq,label,"");
2104 l1a->AddEntry(gq,"quark","pl");
2105 l1a->AddEntry(gg,"gluon","pl");
2111 void AliQuenchingWeights::PlotAvgELossVsPt(Double_t medval,TH1F *hEll) const
2113 // plot relative energy loss for given
2114 // length distribution and parton energy versus pt
2117 Error("PlotAvgELossVsPt","Tables are not loaded.");
2124 sprintf(title,"Relative Energy Loss for Multiple Scattering");
2125 sprintf(name,"cavgelossvsptms2");
2127 sprintf(title,"Relative Energy Loss for Single Hard Scattering");
2128 sprintf(name,"cavgelossvsptsh2");
2130 TCanvas *c = new TCanvas(name,title,0,0,500,400);
2132 TH2F *hframe = new TH2F("havglossvspt",title,2,0,100,2,0,1);
2133 hframe->SetStats(0);
2134 hframe->SetXTitle("p_{T} [GeV]");
2135 hframe->SetYTitle("<E_{loss}>/p_{T} [GeV]");
2138 TGraph *gq=new TGraph(40);
2140 for(Double_t pt=2.5;pt<=100.05;pt+=2.5){
2141 TH1F *dummy=ComputeELossHisto(1,medval,hEll,pt);
2142 Double_t avgloss=dummy->GetMean();
2143 gq->SetPoint(i,pt,avgloss/pt);i++;
2146 gq->SetMarkerStyle(20);
2149 TGraph *gg=new TGraph(40);
2151 for(Double_t pt=2.5;pt<=100.05;pt+=2.5){
2152 TH1F *dummy=ComputeELossHisto(2,medval,hEll,pt);
2153 Double_t avgloss=dummy->GetMean();
2154 gg->SetPoint(i,pt,avgloss/pt);i++;
2157 gg->SetMarkerStyle(24);
2160 TLegend *l1a = new TLegend(0.5,0.6,.95,0.8);
2161 l1a->SetFillStyle(0);
2162 l1a->SetBorderSize(0);
2164 sprintf(label,"<L> = %.2f fm",hEll->GetMean());
2165 l1a->AddEntry(gq,label,"");
2166 l1a->AddEntry(gq,"quark","pl");
2167 l1a->AddEntry(gg,"gluon","pl");
2173 Int_t AliQuenchingWeights::GetIndex(Double_t len) const
2175 //get the index according to length
2176 if(len>fLengthMax) len=fLengthMax;
2178 Int_t l=Int_t(len/0.25);
2179 if((len-l*0.25)>0.125) l++;