+++ /dev/null
-///////////////////////////////////////////////////////////////////////////
-//
-// Copyright 2010
-//
-// This file is part of starlight.
-//
-// starlight is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// starlight is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with starlight. If not, see <http://www.gnu.org/licenses/>.
-//
-///////////////////////////////////////////////////////////////////////////
-//
-// File and Version Information:
-// $Rev:: $: revision of last commit
-// $Author:: $: author of last commit
-// $Date:: $: date of last commit
-//
-// Description:
-//
-//
-//
-///////////////////////////////////////////////////////////////////////////
-
-
-#include <iostream>
-#include <fstream>
-#include <cmath>
-
-#include "inputParameters.h"
-#include "reportingUtils.h"
-#include "starlightconstants.h"
-#include "bessel.h"
-#include "beambeamsystem.h"
-
-
-using namespace std;
-using namespace starlightConstants;
-
-
-//______________________________________________________________________________
-beamBeamSystem::beamBeamSystem(const beam& beam1,
- const beam& beam2)
- : _beamLorentzGamma(inputParametersInstance.beamLorentzGamma()),
- _beamBreakupMode (inputParametersInstance.beamBreakupMode()),
- _beam1 (beam1),
- _beam2 (beam2),
- _breakupProbabilities(0),
- _breakupImpactParameterStep(1.007),
- _breakupCutOff(10e-6)
-{
- init();
-}
-
-
-
-
-//______________________________________________________________________________
-beamBeamSystem::beamBeamSystem()
- : _beamLorentzGamma(inputParametersInstance.beamLorentzGamma()),
- _beamBreakupMode (inputParametersInstance.beamBreakupMode()),
- _beam1 (inputParametersInstance.beam1Z(),
- inputParametersInstance.beam1A(),
- inputParametersInstance.deuteronSlopePar(),
- inputParametersInstance.coherentProduction()),
- _beam2 (inputParametersInstance.beam2Z(),
- inputParametersInstance.beam2A(),
- inputParametersInstance.deuteronSlopePar(),
- inputParametersInstance.coherentProduction()),
- _breakupProbabilities(0),
- _breakupImpactParameterStep(1.007),
- _breakupCutOff(10e-10)
-{
- init();
-}
-
-
-
-//______________________________________________________________________________
-beamBeamSystem::~beamBeamSystem()
-{ }
-
-void beamBeamSystem::init()
-{
- // Calculate beam gamma in CMS frame
- double rap1 = acosh(inputParametersInstance.beam1LorentzGamma());
- double rap2 = -acosh(inputParametersInstance.beam2LorentzGamma());
-
- _cmsBoost = (rap1+rap2)/2.;
-
- _beamLorentzGamma = cosh((rap1-rap2)/2);
- _beam1.setBeamLorentzGamma(_beamLorentzGamma);
- _beam2.setBeamLorentzGamma(_beamLorentzGamma);
-
- generateBreakupProbabilities();
-}
-//______________________________________________________________________________
-double
-beamBeamSystem::probabilityOfBreakup(const double D) const
-{
-
- double bMin = (_beam1.nuclearRadius()+_beam2.nuclearRadius())/2.;
- double pOfB = 0.; // PofB = 1 means that there will be a UPC event and PofB = 0 means no UPC
-
- // Do pp here
- if ((_beam1.Z() == 1) && (_beam1.A() == 1) && (_beam2.Z() == 1) && (_beam2.A() == 1)) {
- double ppslope=19.8;
- double GammaProfile = exp(-D * D / (2. * hbarc * hbarc * ppslope));
- pOfB = (1. - GammaProfile) * (1. - GammaProfile);
- // if (D < 2. * _beam1.nuclearRadius())
- // //Should be the total of RNuc1+Rnuc2,used only beam #1
- // PofB = 0.0;
- // else
- // PofB = 1.0;
- return pOfB;
- }
- else if ( ( (_beam1.A() == 1) && (_beam2.A() != 1) ) || ((_beam1.A() != 1) && (_beam2.A() == 1)) ) {
- // This is pA
- if( _beam1.A() == 1 ){
- bMin = _beam2.nuclearRadius() + 0.7;
- }else if( _beam2.A() == 1 ){
- bMin = _beam1.nuclearRadius() + 0.7;
- }else{
- cout<<"Some logical problem here!"<<endl;
- }
- if( D > bMin )pOfB=1.0;
- return pOfB;
- }
-
- //use the lookup table and return...
- pOfB = 1.;
- if (D > 0.0) {
- //Now we must determine which step number in d corresponds to this D,
- // and use appropiate Ptot(D_i)
- //int i = (int)(log(D / Bmin) / log(1.01));
- int i = (int)(log(D / bMin) / log(_breakupImpactParameterStep));
- if (i <= 0)
- pOfB = _breakupProbabilities[0];
- else{
- if (i >= int(_breakupProbabilities.size()-1))
- pOfB = _breakupProbabilities[_breakupProbabilities.size()-1];
- else {
- // const double DLow = Bmin * pow((1.01), i);
- const double DLow = bMin * pow((_breakupImpactParameterStep), i);
- // const double DeltaD = 0.01 * DLow;
- const double DeltaD = (_breakupImpactParameterStep-1) * DLow;
- const double DeltaP = _breakupProbabilities[i + 1] - _breakupProbabilities[i];
- pOfB = _breakupProbabilities[i] + DeltaP * (D - DLow) / DeltaD;
- }
- }
- }
-
- return pOfB;
-}
-
-void
-beamBeamSystem::generateBreakupProbabilities()
-{
- // Step = 1.007;//.01; //We will multiplicateively increase Biter by 1%
-
-
- double bMin = (_beam1.nuclearRadius()+_beam2.nuclearRadius())/2.;
-
-
- if ((_beam1.Z() != 1) && (_beam1.A() != 1) && (_beam2.Z() != 1) && _beam2.A() != 1) {
-
- if (_beamBreakupMode == 1)
- printInfo << "Hard Sphere Break criteria. b > " << 2. * _beam1.nuclearRadius() << endl;
- if (_beamBreakupMode == 2)
- printInfo << "Requiring XnXn [Coulomb] breakup. " << endl;
- if (_beamBreakupMode == 3)
- printInfo << "Requiring 1n1n [Coulomb only] breakup. " << endl;
- if (_beamBreakupMode == 4)
- printInfo << "Requiring both nuclei to remain intact. " << endl;
- if (_beamBreakupMode == 5)
- printInfo << "Requiring no hadronic interactions. " << endl;
- if (_beamBreakupMode == 6)
- printInfo << "Requiring breakup of one or both nuclei. " << endl;
- if (_beamBreakupMode == 7)
- printInfo << "Requiring breakup of one nucleus (Xn,0n). " << endl;
-
- //pp may cause segmentation fault in here and it does not use this...
- double pOfB = 0;
- double b = bMin;
- double totRad = _beam1.nuclearRadius()+_beam2.nuclearRadius();
-
- while(1)
- {
-
- if(_beamBreakupMode != 5)
- {
- if(b > (totRad*1.5))
- {
- if(pOfB<_breakupCutOff)
- {
-// std::cout << "Break off b: " << b << std::endl;
-// std::cout << "Number of PofB bins: " << _breakupProbabilities.size() << std::endl;
- break;
- }
- }
- }
- else
- {
- if((1-pOfB)<_breakupCutOff)
- {
- // std::cout << "Break off b: " << b << std::endl;
-// std::cout << "Number of PofB bins: " << _breakupProbabilities.size() << std::endl;
- break;
- }
- }
-// std::cout << 1-pOfBreakup << std::endl;
-// _pHadronBreakup = 0;
-// _pPhotonBreakup = 0;
-
-// double pHadronBreakup = probabilityOfHadronBreakup(b);
- probabilityOfHadronBreakup(b);
- //moved gammatarg into photonbreakup
-// double pPhotonBreakup = probabilityOfPhotonBreakup(b, _beamBreakupMode);
- probabilityOfPhotonBreakup(b, _beamBreakupMode);
-
- //What was probability of photonbreakup depending upon mode selection,
- // is now done in the photonbreakupfunction
- if (_beamBreakupMode == 1) {
- if (b >_beam1.nuclearRadius()+_beam2.nuclearRadius()) // symmetry
- _pHadronBreakup = 0;
- else
- _pHadronBreakup = 999.;
- }
-
- b *= _breakupImpactParameterStep;
- pOfB = exp(-1 * _pHadronBreakup) * _pPhotonBreakup;
- _breakupProbabilities.push_back(pOfB);
- }
- }
- else if (((_beam1.Z() == 1) && (_beam1.A() == 1)) || ((_beam2.Z() == 1) && (_beam2.A() == 1))) {
-
- double pOfB = 0;
- double b = bMin;
- double totRad = _beam1.nuclearRadius()+_beam2.nuclearRadius();
-
- while(1)
- {
- if(_beamBreakupMode != 5)
- {
- if(b > (totRad*1.5))
- {
- if(pOfB<_breakupCutOff)
- {
-// std::cout << "Break off b: " << b << std::endl;
- break;
- }
- }
- }
- else
- {
- if((1-pOfB)<_breakupCutOff)
- {
-// std::cout << "Break off b: " << b << std::endl;
- break;
- }
- }
- _beam1.Z() > 1 ? pOfB = exp(-7.35*_beam1.thickness(b)) :
- pOfB = exp(-7.35*_beam2.thickness(b));
- _breakupProbabilities.push_back(pOfB);
- b *= _breakupImpactParameterStep;
- }
- }
-
-
-}
-
-//______________________________________________________________________________
-double
-beamBeamSystem::probabilityOfHadronBreakup(const double impactparameter)
-{
- // double pbreakup =0.;
- //probability of hadron breakup,
- //this is what is returned when the function is called
- double gamma = _beamLorentzGamma;
- //input for gamma_em
- //this will need to be StarlightInputParameters::gamma or whatever
- double b = impactparameter;
- int ap = _beam1.A();
- //Notice this is taking from nucleus 1.Still assuming symmetric system?
-
- static int IFIRSTH = 0;
- static double DELL=0., DELR=0., SIGNN=0., R1=0., A1=0., R2=0., RHO1=0.;
- static double RHO2=0., NZ1=0., NZ2=0., NR1=0., NR2=0.,RR1=0., NY=0., NX=0.;
- static double AN1=0., AN2=0.;
- double delo=0.,RSQ=0.,Z1=0.,Y=0.,X=0.,XB=0.,RPU=0.,IRUP=0.,RTU=0.;
- double IRUT=0.,T1=0.,T2=0.;
- static double DEN1[20002], DEN2[20002];
- if (IFIRSTH != 0) goto L100;
- //Initialize
- //Integration delta x, delta z
- IFIRSTH = 1;
- DELL = .05;
- DELR = .01;
-
- //use two sigma_NN's. 52mb at rhic 100gev/beam, 88mb at LHC 2.9tev/beam, gamma is in cm system
- SIGNN = 5.2;
- if ( gamma > 500. ) SIGNN = 8.8;
- //use parameter from Constants
- R1 = ( _beam1.nuclearRadius()); //remember _beam2? better way to do this generically
- A1 = 0.535; //This is woodsaxonskindepth?
- //write(6,12)r1,a1,signn Here is where we could probably set this up asymmetrically R2=_beam2.nuclearRadius() and RHO2=ap2=_beam2.A()
- R2 = R1;
- RHO1 = ap;
- RHO2 = RHO1;
- NZ1 = ((R1+5.)/DELR);
- NR1 = NZ1;
- NZ2 = ((R2+5.)/DELR);
- NR2 = NZ2;
- RR1 = -DELR;
- NY = ((R1+5.)/DELL);
- NX = 2*NY;
- for ( int IR1 = 1; IR1 <= NR1; IR1++) {
- DEN1[IR1] = 0.;
- RR1 = RR1+DELR;
- Z1 = -DELR/2;
-
- for ( int IZ1 = 1; IZ1 <= NZ1; IZ1++) {
- Z1 = Z1+DELR;
- RSQ = RR1*RR1+Z1*Z1;
- DEN1[IR1] = DEN1[IR1]+1./(1.+exp((sqrt(RSQ)-R1)/A1));
- }//for(IZ)
-
- DEN1[IR1] = DEN1[IR1]*2.*DELR;
- DEN2[IR1] = DEN1[IR1];
- }//for(IR)
-
- AN1 = 0.;
- RR1 = 0.;
-
- for ( int IR1 =1; IR1 <= NR1; IR1++) {
- RR1 = RR1+DELR;
- AN1 = AN1+RR1*DEN1[IR1]*DELR*2.*3.141592654;
- }//for(IR)
-
- AN2 = AN1; //This will also probably need to be changed?
-
- delo = .05;
- //.1 to turn mb into fm^2
- //Calculate breakup probability here
- L100:
- _pHadronBreakup = 0.;
- if ( b > 25. ) return _pHadronBreakup;
- Y = -.5*DELL;
- for ( int IY = 1; IY <= NY; IY++) {
- Y = Y+DELL;
- X = -DELL*float(NY+1);
-
- for ( int IX = 1; IX <=NX; IX++) {
- X = X+DELL;
- XB = b-X;
- RPU = sqrt(X*X+Y*Y);
- IRUP = (RPU/DELR)+1;
- RTU = sqrt(XB*XB+Y*Y);
- IRUT = (RTU/DELR)+1;
- T1 = DEN2[(int)IRUT]*RHO2/AN2;
- T2 = DEN1[(int)IRUP]*RHO1/AN1;
- //Eq.6 BCW, Baltz, Chasman, White, Nucl. Inst. & Methods A 417, 1 (1998)
- _pHadronBreakup=_pHadronBreakup+2.*T1*(1.-exp(-SIGNN*T2))*DELL*DELL;
- }//for(IX)
- }//for(IY)
-
- return _pHadronBreakup;
-}
-
-
-//______________________________________________________________________________
-double
-beamBeamSystem::probabilityOfPhotonBreakup(const double impactparameter, const int mode)
-{
- static double ee[10001], eee[162], se[10001];
-
- //double gamma_em=108.4; //This will be an input value.
- _pPhotonBreakup =0.; //Might default the probability with a different value?
- double b = impactparameter;
- int zp = _beam1.Z(); //What about _beam2? Generic approach?
- int ap = _beam1.A();
-
- //Was initialized at the start of the function originally, been moved inward.
- double pxn=0.;
- double p1n=0.;
-
- //Used to be done prior to entering the function. Done properly for assymetric?
- double gammatarg = 2.*_beamLorentzGamma*_beamLorentzGamma-1.;
- double omaxx =0.;
- //This was done prior entering the function as well
- if (_beamLorentzGamma > 500.){
- omaxx=1.E10;
- }
- else{
- omaxx=1.E7;
- }
-
-
- double e1[23]= {0.,103.,106.,112.,119.,127.,132.,145.,171.,199.,230.,235.,
- 254.,280.,300.,320.,330.,333.,373.,390.,420.,426.,440.};
- double s1[23]= {0.,12.0,11.5,12.0,12.0,12.0,15.0,17.0,28.0,33.0,
- 52.0,60.0,70.0,76.0,85.0,86.0,89.0,89.0,75.0,76.0,69.0,59.0,61.0};
- double e2[12]={0.,2000.,3270.,4100.,4810.,6210.,6600.,
- 7790.,8400.,9510.,13600.,16400.};
- double s2[12]={0.,.1266,.1080,.0805,.1017,.0942,.0844,.0841,.0755,.0827,
- .0626,.0740};
- double e3[29]={0.,26.,28.,30.,32.,34.,36.,38.,40.,44.,46.,48.,50.,52.,55.,
- 57.,62.,64.,66.,69.,72.,74.,76.,79.,82.,86.,92.,98.,103.};
- double s3[29]={0.,30.,21.5,22.5,18.5,17.5,15.,14.5,19.,17.5,16.,14.,
- 20.,16.5,17.5,17.,15.5,18.,15.5,15.5,15.,13.5,18.,14.5,15.5,12.5,13.,
- 13.,12.};
- static double sa[161]={0.,0.,.004,.008,.013,.017,.021,.025,.029,.034,.038,.042,.046,
- .051,.055,.059,.063,.067,.072,.076,.08,.085,.09,.095,.1,.108,.116,
- .124,.132,.14,.152,.164,.176,.188,.2,.22,.24,.26,.28,.3,.32,.34,
- .36,.38,.4,.417,.433,.450,.467,.483,.5,.51,.516,.52,.523,.5245,
- .525,.5242,
- .5214,.518,.512,.505,.495,.482,.469,.456,.442,.428,.414,.4,.386,
- .370,.355,.34,.325,.310,.295,.280,.265,.25,.236,.222,.208,.194,
- .180,.166,
- .152,.138,.124,.11,.101,.095,.09,.085,.08,.076,.072,.069,.066,
- .063,.06,.0575,.055,.0525,.05,.04875,.0475,.04625,.045,.04375,
- .0425,.04125,.04,.03875,.0375,.03625,.035,.03375,.0325,.03125,.03,
- .02925,.0285,.02775,.027,.02625,.0255,.02475,.024,.02325,.0225,
- .02175,.021,.02025,.0195,.01875,.018,.01725,.0165,.01575,.015,
- .01425,.0135,.01275,.012,.01125,.0105,.00975,.009,.00825,.0075,
- .00675,.006,.00525,.0045,.00375,.003,.00225,.0015,.00075,0.};
-
-
-
- double sen[161]={0.,0.,.012,.025,.038,.028,.028,.038,.035,.029,.039,.035,
- .038,.032,.038,.041,.041,.049,.055,.061,.072,.076,.070,.067,
- .080,.103,.125,.138,.118,.103,.129,.155,.170,.180,.190,.200,
- .215,.250,.302,.310,.301,.315,.330,.355,.380,.400,.410,.420,
- .438,.456,.474,.492,.510,.533,.556,.578,.6,.62,.63,.638,
- .640,.640,.637,.631,.625,.618,.610,.600,.580,.555,.530,.505,
- .480,.455,.435,.410,.385,.360,.340,.320,.300,.285,.270,.255,
- .240,.225,.210,.180,.165,.150,.140,.132,.124,.116,.108,.100,
- .092,.084,.077,.071,.066,.060,.055,.051,.048,.046,.044,.042,
- .040,.038,.036,.034,.032,.030,.028,.027,.026,.025,.025,.025,
- .024,.024,.024,.024,.024,.023,.023,.023,.023,.023,.022,.022,
- .022,.022,.022,.021,.021,.021,.020,.020,
- .020,.019,.018,.017,.016,.015,.014,.013,.012,.011,.010,.009,
- .008,.007,.006,.005,.004,.003,.002,.001,0.};
-
- // gammay,p gamma,n of Armstrong begin at 265 incr 25
-
-
- double sigt[160]={0.,.4245,.4870,.5269,.4778,.4066,.3341,.2444,.2245,.2005,
- .1783,.1769,.1869,.1940,.2117,.2226,.2327,.2395,.2646,.2790,.2756,
- .2607,.2447,.2211,.2063,.2137,.2088,.2017,.2050,.2015,.2121,.2175,
- .2152,.1917,.1911,.1747,.1650,.1587,.1622,.1496,.1486,.1438,.1556,
- .1468,.1536,.1544,.1536,.1468,.1535,.1442,.1515,.1559,.1541,.1461,
- .1388,.1565,.1502,.1503,.1454,.1389,.1445,.1425,.1415,.1424,.1432,
- .1486,.1539,.1354,.1480,.1443,.1435,.1491,.1435,.1380,.1317,.1445,
- .1375,.1449,.1359,.1383,.1390,.1361,.1286,.1359,.1395,.1327,.1387,
- .1431,.1403,.1404,.1389,.1410,.1304,.1363,.1241,.1284,.1299,.1325,
- .1343,.1387,.1328,.1444,.1334,.1362,.1302,.1338,.1339,.1304,.1314,
- .1287,.1404,.1383,.1292,.1436,.1280,.1326,.1321,.1268,.1278,.1243,
- .1239,.1271,.1213,.1338,.1287,.1343,.1231,.1317,.1214,.1370,.1232,
- .1301,.1348,.1294,.1278,.1227,.1218,.1198,.1193,.1342,.1323,.1248,
- .1220,.1139,.1271,.1224,.1347,.1249,.1163,.1362,.1236,.1462,.1356,
- .1198,.1419,.1324,.1288,.1336,.1335,.1266};
-
-
- double sigtn[160]={0.,.3125,.3930,.4401,.4582,.3774,.3329,.2996,.2715,.2165,
- .2297,.1861,.1551,.2020,.2073,.2064,.2193,.2275,.2384,.2150,.2494,
- .2133,.2023,.1969,.1797,.1693,.1642,.1463,.1280,.1555,.1489,.1435,
- .1398,.1573,.1479,.1493,.1417,.1403,.1258,.1354,.1394,.1420,.1364,
- .1325,.1455,.1326,.1397,.1286,.1260,.1314,.1378,.1353,.1264,.1471,
- .1650,.1311,.1261,.1348,.1277,.1518,.1297,.1452,.1453,.1598,.1323,
- .1234,.1212,.1333,.1434,.1380,.1330,.12,.12,.12,.12,.12,.12,.12,.12,
- .12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,
- .12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,
- .12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,
- .12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,
- .12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12,.12};
- //89*.12};
-
-
-
- static int IFIRSTP=0;
-
-
- // Initialization needed?
- //double hbar=197.3;
- //double pi=3.141592654;
-
- // added
- double si1=0, g1 =0, o1=0;
- int ne = 0, ij =0;
- double delo=0, omax =0, gk1m=0;
- static double scon=0., zcon=0.,o0=0.;
-
-
- double x=0,y=0,eps=0,eta=0,em=0,exx=0,s=0,ictr=0,pom=0,vec=0,gk1=0;
-
- // maximum energy for GDR dissocation (in target frame, in MeV)
-
- double omax1n=24.01;
-
- if (IFIRSTP != 0) goto L100;
-
- IFIRSTP=1;
-
-
- //This whole thing is dependenant on gold or lead....Might need to expand
- if (zp == 79)
- {
-
-
- ap=197;
- si1=540.;
- g1=4.75;
-
- // peak and minimum energies for GDR excitation (in MeV)
- o1=13.70;
- o0=8.1;
- }
- else
- {
- zp=82; //assumed to be lead
- ap=208;
- si1=640.;
- g1=4.05;
- o1=13.42;
- o0=7.4;
- for(int j=1;j<=160;j++)
- {
-
- sa[j]=sen[j];
- }
- }
- //Part II of initialization
- delo = .05;
- //.1 to turn mb into fm^2
- scon = .1*g1*g1*si1;
- zcon = zp/(gammatarg*( pi)*(
- hbarcmev))*zp/(gammatarg*( pi)*
- ( hbarcmev))/137.04;
-
- //single neutron from GDR, Veyssiere et al. Nucl. Phys. A159, 561 (1970)
- for ( int i = 1; i <= 160; i++) {
- eee[i] = o0+.1*(i-1);
- sa[i] = 100.*sa[i];
- }
- //See Baltz, Rhoades-Brown, and Weneser, Phys. Rev. E 54, 4233 (1996)
- //for details of the following photo cross-sections
- eee[161]=24.1;
- ne=int((25.-o0)/delo)+1;
- //GDR any number of neutrons, Veyssiere et al., Nucl. Phys. A159, 561 (1970)
- for ( int i = 1; i <= ne; i++ ) {
- ee[i] = o0+(i-1)*delo;
- //cout<<" ee 1 "<<ee[i]<<" "<<i<<endl;
-
- se[i] = scon*ee[i]*ee[i]/(((o1*o1-ee[i]*ee[i])*(o1*o1-ee[i]*ee[i]))
- +ee[i]*ee[i]*g1*g1);
- }
- ij = ne; //Risky?
- //25-103 MeV, Lepretre, et al., Nucl. Phys. A367, 237 (1981)
- for ( int j = 1; j <= 27; j++ ) {
- ij = ij+1;
- ee[ij] = e3[j];
- //cout<<" ee 2 "<<ee[ij]<<" "<<ij<<endl;
-
- se[ij] = .1*ap*s3[j]/208.;
- }
- //103-440 MeV, Carlos, et al., Nucl. Phys. A431, 573 (1984)
- for ( int j = 1; j <= 22; j++ ) {
- ij = ij+1;
- ee[ij] = e1[j];
- //cout<<" ee 3 "<<ee[ij]<<" "<<ij<<endl;
- se[ij] = .1*ap*s1[j]/208.;
- }
- //440 MeV-2 GeV Armstrong et al.
- for ( int j = 9; j <= 70; j++) {
- ij = ij+1;
- ee[ij] = ee[ij-1]+25.;
- //cout<<" ee 4 "<<ee[ij]<<" "<<ij<<endl;
- se[ij] = .1*(zp*sigt[j]+(ap-zp)*sigtn[j]);
- }
- //2-16.4 GeV Michalowski; Caldwell
- for ( int j = 1; j <= 11; j++) {
- ij = ij+1;
- ee[ij] = e2[j];
- //cout<<" ee 5 "<<ee[ij]<<" "<<ij<<endl;
- se[ij] = .1*ap*s2[j];
- }
- //Regge paramteres
- x = .0677;
- y = .129;
- eps = .0808;
- eta = .4525;
- em = .94;
- exx = pow(10,.05);
-
- //Regge model for high energy
- s = .002*em*ee[ij];
- //make sure we reach LHC energies
- ictr = 100;
- if ( gammatarg > (2.*150.*150.)) ictr = 150;
- for ( int j = 1; j <= ictr; j++ ) {
- ij = ij+1;
- s = s*exx;
- ee[ij] = 1000.*.5*(s-em*em)/em;
- //cout<<" ee 6 "<<ee[ij]<<" "<<ij<<endl;
- pom = x*pow(s,eps);
- vec = y*pow(s,(-eta));
- se[ij] = .1*.65*ap*(pom+vec);
- }
- ee[ij+1] = 99999999999.;
- //done with initaliation
- //write(6,99)o0;
- //clear counters for 1N, XN
- L100:
-
- p1n = 0.;
- pxn = 0.;
- //start XN calculation
- //what's the b-dependent highest energy of interest?
-
- omax = min(omaxx,4.*gammatarg*( hbarcmev)/b);
- if ( omax < o0 ) return _pPhotonBreakup;
- gk1m = bessel::dbesk1(ee[1]*b/(( hbarcmev)*gammatarg));
- int k = 2;
- L212:
- if (ee[k] < omax ) {
- gk1 = bessel::dbesk1(ee[k]*b/(( hbarcmev)*gammatarg));
- //Eq. 3 of BCW--NIM in Physics Research A 417 (1998) pp1-8:
- pxn=pxn+zcon*(ee[k]-ee[k-1])*.5*(se[k-1]*ee[k-1]*gk1m*gk1m+se[k]*ee[k]*gk1*gk1);
- k = k + 1;
- gk1m = gk1;
- goto L212;
- }
- //one neutron dissociation
- omax = min(omax1n,4.*gammatarg*( hbarcmev)/b);
- gk1m = bessel::dbesk1(eee[1]*b/(( hbarcmev)*gammatarg));
- k = 2;
- L102:
- if (eee[k] < omax ) {
- gk1 = bessel::dbesk1(eee[k]*b/(( hbarcmev)*gammatarg));
- //Like Eq3 but with only the one neutron out GDR photo cross section input
- p1n = p1n+zcon*(eee[k]-eee[k-1])*.5*(sa[k-1]*eee[k-1]*gk1m*gk1m+sa[k]*eee[k]*gk1*gk1);
- k = k+1;
- gk1m = gk1;
- goto L102;
- }
-
-
- //This used to be done externally, now it is done internally.
- if (( mode) == 1) _pPhotonBreakup = 1.;
- if (( mode) == 2) _pPhotonBreakup = (1-exp(-1*pxn))*(1-exp(-1*pxn));
- if (( mode) == 3) _pPhotonBreakup = (p1n*exp(-1*pxn))*(p1n*exp(-1*pxn));
- if (( mode) == 4) _pPhotonBreakup = exp(-2*pxn);
- if (( mode) == 5) _pPhotonBreakup = 1.;
- if (( mode) == 6) _pPhotonBreakup = (1. - exp(-2.*pxn));
- if (( mode) == 7) _pPhotonBreakup = 2.*exp(-pxn)*(1.-exp(-pxn));
-
- //cout<<pxn<<" "<<zcon<<" "<<ee[k]<<" "<<se[k-1]<<" "<<gk1m<<" "<<gk1<<" "<<k<<" "<<ee[k+1]<< " "<<b<< endl;
-
- return _pPhotonBreakup;
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff