* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-*/
-
-/*
-Old Log:
-Revision 1.8 2000/06/08 13:34:50 fca
-Better control of momentum range in GenBox
-
-Revision 1.7 2000/06/07 16:29:58 fca
-Adding check for pt range in AliGenBox
-
-Revision 1.6 1999/11/03 17:43:20 fca
-New version from G.Martinez & A.Morsch
-
-Revision 1.5 1999/09/29 09:24:14 fca
-Introduction of the Copyright and cvs Log
-*/
-
-///////////////////////////////////////////////////////////////////
-// //
-// Generate the final state of the interaction as the input //
-// to the MonteCarlo //
-//
-//Begin_Html
-/*
-<img src="picts/AliGeneratorClass.gif">
-</pre>
-<br clear=left>
-<font size=+2 color=red>
-<p>The responsible person for this module is
-<a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>.
-</font>
-<pre>
-*/
-//End_Html
-// //
-///////////////////////////////////////////////////////////////////
+/* $Id$ */
+
+// Generator for particles in a preset
+// kinematic range (flat distribution)
+// Note that for a given theta pt and p are not independent
+// Range for only one variable (pt or p) should be given.
+// Comments and suggestions: andreas.morsch@cern.ch
+
+
+#include "TPDGCode.h"
+
+#include "AliConst.h"
#include "AliGenBox.h"
#include "AliRun.h"
-#include "AliConst.h"
+#include "AliGenEventHeader.h"
+#include "TDatabasePDG.h"
#include "AliPDG.h"
ClassImp(AliGenBox)
//_____________________________________________________________________________
AliGenBox::AliGenBox()
- :AliGenerator()
+ :AliGenerator(),
+ fIpart(0),
+ fEtaMin(0),
+ fEtaMax(0)
{
//
// Default constructor
//
- fIpart=0;
}
//_____________________________________________________________________________
AliGenBox::AliGenBox(Int_t npart)
- :AliGenerator(npart)
+ :AliGenerator(npart),
+ fIpart(kProton),
+ fEtaMin(0),
+ fEtaMax(0)
{
//
// Standard constructor
//
- fName="Box";
- fTitle="Box particle generator";
- // Generate Proton by default
- fIpart=kProton;
+ fName = "Box";
+ fTitle = "Box particle generator";
}
//_____________________________________________________________________________
-void AliGenBox::Generate()
+void AliGenBox::Generate() {
+ //
+ // Generate one trigger (fNpart particles)
+ //
+ GenerateN(1);
+}
+
+//_____________________________________________________________________________
+void AliGenBox::GenerateN(Int_t ntimes)
{
//
- // Generate one trigger
+ // Generate ntimes triggers
+ // total ntimes*fNpart particles
//
Float_t polar[3]= {0,0,0};
//
Float_t origin[3];
+ Float_t time;
Float_t p[3];
Int_t i, j, nt;
Double_t pmom, theta, phi, pt;
+ Double_t y, mt;
//
Float_t random[6];
//
for (j=0;j<3;j++) origin[j]=fOrigin[j];
- if(fVertexSmear==perEvent) {
- gMC->Rndm(random,6);
- for (j=0;j<3;j++) {
- origin[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
- TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
- }
+ time = fTimeOrigin;
+ if(fVertexSmear==kPerEvent) {
+ Vertex();
+ for (j=0;j<3;j++) origin[j]=fVertex[j];
+ time = fTime;
}
- for(i=0;i<fNpart;i++) {
- gMC->Rndm(random,3);
- theta=fThetaMin+random[0]*(fThetaMax-fThetaMin);
- if(TestBit(kMomentumRange)) {
- pmom=fPMin+random[1]*(fPMax-fPMin);
- pt=pmom*TMath::Sin(theta);
+
+ Double_t m = TDatabasePDG::Instance()->GetParticle(fIpart)->Mass();
+
+ Int_t mult = fNpart*ntimes;
+ for(i=0;i<mult;i++) {
+ Rndm(random,3);
+
+ if (TestBit(kYRange)) {
+ y = fYMin+random[0]*(fYMax-fYMin);
+
+ if(TestBit(kMomentumRange)) {
+ pmom=fPMin+random[1]*(fPMax-fPMin);
+ mt = TMath::Sqrt(pmom*pmom+m*m)/TMath::CosH(y);
+ pt = TMath::Sqrt(mt*mt - m*m);
+ } else {
+ pt=fPtMin+random[1]*(fPtMax-fPtMin);
+ mt=TMath::Sqrt(pt*pt+m*m);
+ }
+
+ phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
+ p[0] = pt*TMath::Cos(phi);
+ p[1] = pt*TMath::Sin(phi);
+ p[2] = mt*TMath::SinH(y);
} else {
+ if (TestBit(kThetaRange)) {
+ theta = fThetaMin+random[0]*(fThetaMax-fThetaMin);
+ } else {
+ Float_t eta = fEtaMin+random[0]*(fEtaMax-fEtaMin);
+ theta = 2. * TMath::ATan(TMath::Exp(-eta));
+ }
+
+ if(TestBit(kMomentumRange)) {
+ pmom=fPMin+random[1]*(fPMax-fPMin);
+ pt=pmom*TMath::Sin(theta);
+ } else {
+
+ pt=fPtMin+random[1]*(fPtMax-fPtMin);
+ pmom=pt/TMath::Sin(theta);
+ }
- pt=fPtMin+random[1]*(fPtMax-fPtMin);
- pmom=pt/TMath::Sin(theta);
+ phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
+ p[0] = pt*TMath::Cos(phi);
+ p[1] = pt*TMath::Sin(phi);
+ p[2] = pmom*TMath::Cos(theta);
}
- phi=fPhiMin+random[2]*(fPhiMax-fPhiMin);
- p[0] = pt*TMath::Cos(phi);
- p[1] = pt*TMath::Sin(phi);
- p[2] = pmom*TMath::Cos(theta);
- if(fVertexSmear==perTrack) {
- gMC->Rndm(random,6);
+ if(fVertexSmear==kPerTrack) {
+ Rndm(random,6);
for (j=0;j<3;j++) {
origin[j]=fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
}
+
+ Rndm(random,2);
+ time = fTimeOrigin + fOsigma[2]/TMath::Ccgs()*
+ TMath::Cos(2*random[0]*TMath::Pi())*
+ TMath::Sqrt(-2*TMath::Log(random[1]));
}
- gAlice->SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,"Primary",nt);
+ PushTrack(fTrackIt,-1,fIpart,p,origin,polar,time,kPPrimary,nt, 1., 1);
+ }
+
+ AliGenEventHeader* header = new AliGenEventHeader("BOX");
+ header->SetPrimaryVertex(fVertex);
+ header->SetNProduced(mult);
+ header->SetInteractionTime(fTime);
+
+ // Passes header either to the container or to gAlice
+ if (fContainer) {
+ header->SetName(fName);
+ fContainer->AddHeader(header);
+ } else {
+ gAlice->SetGenEventHeader(header);
}
}
Fatal("Init","You should not set the momentum range and the pt range!\n");
if((!TestBit(kPtRange))&&(!TestBit(kMomentumRange)))
Fatal("Init","You should set either the momentum or the pt range!\n");
+ if((TestBit(kYRange)&&TestBit(kThetaRange)) || (TestBit(kYRange)&&TestBit(kEtaRange)) || (TestBit(kEtaRange)&&TestBit(kThetaRange)) )
+ Fatal("Init","You should only set the range of one of these variables: y, eta or theta\n");
+ if((!TestBit(kYRange)) && (!TestBit(kEtaRange)) && (!TestBit(kThetaRange)) )
+ Fatal("Init","You should set the range of one of these variables: y, eta or theta\n");
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff