return x/TMath::Power(pass1,kxn);
}
+Double_t AliGenMUONlib::PtJpsiCDFscaledPP( Double_t *px, Double_t */*dummy*/)
+{
+// J/Psi pT
+//
+// pp 14 TeV
+//
+// scaled from CDF data at 2 TeV
+
+ const Double_t kpt0 = 5.355;
+ const Double_t kxn = 3.821;
+ Double_t x=*px;
+ //
+ Double_t pass1 = 1.+(x/kpt0)*(x/kpt0);
+ return x/TMath::Power(pass1,kxn);
+}
+
+Double_t AliGenMUONlib::PtJpsiFlat( Double_t */*px*/, Double_t */*dummy*/ )
+{
+ return 1.;
+}
+
Double_t AliGenMUONlib::PtJpsiPbPb( Double_t *px, Double_t */*dummy*/)
{
// J/Psi pT spectrum
};
Double_t y;
- if (x < 15.) {
+ if (x < 10.) {
Int_t j;
y = c[j = 7];
while (j > 0) y = y * x +c[--j];
return yj;
}
+Double_t AliGenMUONlib::YJpsiFlat( Double_t */*py*/, Double_t */*dummy*/ )
+{
+ return 1.;
+}
+
Double_t AliGenMUONlib::YJpsiPbPb( Double_t *px, Double_t */*dummy*/)
{
return AliGenMUONlib::YJpsiPbPb(px, dummy);
}
+Double_t AliGenMUONlib::YJpsiCDFscaledPP( Double_t *px, Double_t* dummy)
+{
+ // J/Psi y
+ return AliGenMUONlib::YJpsiPP(px, dummy);
+}
Double_t AliGenMUONlib::YJpsiPP( Double_t *px, Double_t */*dummy*/)
{
return x/TMath::Power(pass1,kxn);
}
+Double_t AliGenMUONlib::PtUpsilonCDFscaledPP( Double_t *px, Double_t */*dummy*/ )
+{
+// Upsilon pT
+//
+// pp 14 TeV
+//
+// scaled from CDF data at 2 TeV
+
+ const Double_t kpt0 = 8.610;
+ const Double_t kxn = 3.051;
+ Double_t x=*px;
+ //
+ Double_t pass1 = 1.+(x/kpt0)*(x/kpt0);
+ return x/TMath::Power(pass1,kxn);
+}
+
+Double_t AliGenMUONlib::PtUpsilonFlat( Double_t */*px*/, Double_t */*dummy*/ )
+{
+ return 1.;
+}
+
Double_t AliGenMUONlib::PtUpsilonPbPb( Double_t *px, Double_t */*dummy*/)
{
}
+Double_t AliGenMUONlib::YUpsilonCDFscaledPP( Double_t *px, Double_t *dummy)
+{
+ // Upsilon y
+ return AliGenMUONlib::YUpsilonPP(px, dummy);
+
+}
+
+Double_t AliGenMUONlib::YUpsilonFlat( Double_t */*px*/, Double_t */*dummy*/)
+{
+ // Upsilon y
+ return 1.;
+
+}
+
Double_t AliGenMUONlib::YUpsilonPP( Double_t *px, Double_t */*dummy*/)
{
// y-distribution
Double_t AliGenMUONlib::YCharm( Double_t *px, Double_t */*dummy*/)
{
-// Charm y
- Double_t *dum=0;
- return YJpsi(px,dum);
+// Charm y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225)
+// Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD)
+// shadowing + kt broadening
+
+ Double_t x=px[0];
+ Double_t c[2]={-2.42985e-03,-2.31001e-04};
+ Double_t y=1+(c[0]*TMath::Power(x,2))+(c[1]*TMath::Power(x,4));
+ Double_t ycharm;
+
+ if (TMath::Abs(x)>8) {
+ ycharm=0.;
+ }
+ else {
+ ycharm=TMath::Power(y,3);
+ }
+
+ return ycharm;
}
+
Int_t AliGenMUONlib::IpCharm(TRandom *ran)
{
// Charm composition
Int_t ip;
// 411,421,431,4122
random = ran->Rndm();
- if (random < 0.5) {
- ip=411;
- } else if (random < 0.75) {
- ip=421;
- } else if (random < 0.90) {
- ip=431;
+// Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3
+// >>>>> cf. tab 4 p 11
+
+ if (random < 0.30) {
+ ip=421;
+ } else if (random < 0.60) {
+ ip=-421;
+ } else if (random < 0.70) {
+ ip=411;
+ } else if (random < 0.80) {
+ ip=-411;
+ } else if (random < 0.86) {
+ ip=431;
+ } else if (random < 0.92) {
+ ip=-431;
+ } else if (random < 0.96) {
+ ip=4122;
} else {
- ip=4122;
+ ip=-4122;
}
- if (ran->Rndm() < 0.5) {ip=-ip;}
return ip;
}
-
//
// Beauty
//
// y-distribution
Double_t AliGenMUONlib::YBeauty( Double_t *px, Double_t */*dummy*/)
{
-// Beauty y
- Double_t *dum=0;
- return YJpsi(px,dum);
+// Beauty y :: Carrer & Dainese : ALICE-INT-2003-019 v.3 (hep-ph/0311225)
+// Pythia tuned to reproduce the distribution given by the HVQMNR program based on NLO calculations (pQCD)
+// shadowing + kt broadening
+
+ Double_t x=px[0];
+ Double_t c[2]={-1.27590e-02,-2.42731e-04};
+ Double_t y=1+c[0]*TMath::Power(x,2)+c[1]*TMath::Power(x,4);
+ Double_t ybeauty;
+
+ if (TMath::Abs(x)>6) {
+ ybeauty=0.;
+ }
+ else {
+ ybeauty=TMath::Power(y,3);
+ }
+
+ return ybeauty;
}
+
Int_t AliGenMUONlib::IpBeauty(TRandom *ran)
{
// Beauty Composition
Float_t random;
Int_t ip;
- random = ran->Rndm();
- if (random < 0.5) {
- ip=511;
- } else if (random < 0.75) {
- ip=521;
- } else if (random < 0.90) {
- ip=531;
+ random = ran->Rndm();
+
+// Taux de production Carrer & Dainese : ALICE-INT-2003-019 v.3
+// >>>>> cf. tab 4 p 11
+
+ if (random < 0.20) {
+ ip=511;
+ } else if (random < 0.40) {
+ ip=-511;
+ } else if (random < 0.605) {
+ ip=521;
+ } else if (random < 0.81) {
+ ip=-521;
+ } else if (random < 0.87) {
+ ip=531;
+ } else if (random < 0.93) {
+ ip=-531;
+ } else if (random < 0.965) {
+ ip=5122;
} else {
- ip=5122;
+ ip=-5122;
}
- if (ran->Rndm() < 0.5) {ip=-ip;}
- return ip;
+ return ip;
}
+
typedef Double_t (*GenFunc) (Double_t*, Double_t*);
GenFunc AliGenMUONlib::GetPt(Int_t param, const char* tname) const
{
func=PtJpsiPP;
} else if (sname == "CDF scaled") {
func=PtJpsiCDFscaled;
+ } else if (sname == "CDF pp") {
+ func=PtJpsiCDFscaledPP;
+ } else if (sname == "Flat") {
+ func=PtJpsiFlat;
} else {
func=PtJpsi;
}
func=PtUpsilonPP;
} else if (sname == "CDF scaled") {
func=PtUpsilonCDFscaled;
+ } else if (sname == "CDF pp") {
+ func=PtUpsilonCDFscaledPP;
+ } else if (sname == "Flat") {
+ func=PtUpsilonFlat;
} else {
func=PtUpsilon;
}
case kKaon:
func=PtKaon;
break;
+ case kChi_c0:
+ func=PtChi_c0;
+ break;
+ case kChi_c1:
+ func=PtChi_c1;
+ break;
+ case kChi_c2:
+ func=PtChi_c2;
+ break;
+ case kChi_c:
+ func=PtChi_c;
+ break;
default:
func=0;
printf("<AliGenMUONlib::GetPt> unknown parametrisation\n");
func=YJpsiPP;
} else if (sname == "CDF scaled") {
func=YJpsiCDFscaled;
+ } else if (sname == "CDF pp") {
+ func=YJpsiCDFscaledPP;
+ } else if (sname == "Flat") {
+ func=YJpsiFlat;
} else {
func=YJpsi;
}
func = YUpsilonPP;
} else if (sname == "CDF scaled") {
func=YUpsilonCDFscaled;
+ } else if (sname == "CDF pp") {
+ func=YUpsilonCDFscaledPP;
+ } else if (sname == "Flat") {
+ func=YUpsilonFlat;
} else {
func=YUpsilon;
}
case kKaon:
func=YKaon;
break;
+ case kChi_c0:
+ func=YChi_c0;
+ break;
+ case kChi_c1:
+ func=YChi_c1;
+ break;
+ case kChi_c2:
+ func=YChi_c2;
+ break;
+ case kChi_c:
+ func=YChi_c;
+ break;
default:
func=0;
printf("<AliGenMUONlib::GetY> unknown parametrisation\n");
}
return func;
}
+
+//
+// Chi
+//
+//
+// pt-distribution
+//____________________________________________________________
+Double_t AliGenMUONlib::PtChi_c0( Double_t *px, Double_t */*dummy*/)
+{
+// Chi_c1 pT
+ const Double_t kpt0 = 4.;
+ const Double_t kxn = 3.6;
+ Double_t x=*px;
+ //
+ Double_t pass1 = 1.+(x/kpt0)*(x/kpt0);
+ return x/TMath::Power(pass1,kxn);
+}
+Double_t AliGenMUONlib::PtChi_c1( Double_t *px, Double_t */*dummy*/)
+{
+// Chi_c1 pT
+ const Double_t kpt0 = 4.;
+ const Double_t kxn = 3.6;
+ Double_t x=*px;
+ //
+ Double_t pass1 = 1.+(x/kpt0)*(x/kpt0);
+ return x/TMath::Power(pass1,kxn);
+}
+Double_t AliGenMUONlib::PtChi_c2( Double_t *px, Double_t */*dummy*/)
+{
+// Chi_c2 pT
+ const Double_t kpt0 = 4.;
+ const Double_t kxn = 3.6;
+ Double_t x=*px;
+ //
+ Double_t pass1 = 1.+(x/kpt0)*(x/kpt0);
+ return x/TMath::Power(pass1,kxn);
+}
+Double_t AliGenMUONlib::PtChi_c( Double_t *px, Double_t */*dummy*/)
+{
+// Chi_c family pT
+ const Double_t kpt0 = 4.;
+ const Double_t kxn = 3.6;
+ Double_t x=*px;
+ //
+ Double_t pass1 = 1.+(x/kpt0)*(x/kpt0);
+ return x/TMath::Power(pass1,kxn);
+}
+
+//
+// y-distribution
+//____________________________________________________________
+Double_t AliGenMUONlib::YChi_c0(Double_t *py, Double_t */*dummy*/)
+{
+// Chi-1c y
+ const Double_t ky0 = 4.;
+ const Double_t kb=1.;
+ Double_t yj;
+ Double_t y=TMath::Abs(*py);
+ //
+ if (y < ky0)
+ yj=kb;
+ else
+ yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2);
+ return yj;
+}
+
+Double_t AliGenMUONlib::YChi_c1(Double_t *py, Double_t */*dummy*/)
+{
+// Chi-1c y
+ const Double_t ky0 = 4.;
+ const Double_t kb=1.;
+ Double_t yj;
+ Double_t y=TMath::Abs(*py);
+ //
+ if (y < ky0)
+ yj=kb;
+ else
+ yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2);
+ return yj;
+}
+
+Double_t AliGenMUONlib::YChi_c2(Double_t *py, Double_t */*dummy*/)
+{
+// Chi-2c y
+ const Double_t ky0 = 4.;
+ const Double_t kb=1.;
+ Double_t yj;
+ Double_t y=TMath::Abs(*py);
+ //
+ if (y < ky0)
+ yj=kb;
+ else
+ yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2);
+ return yj;
+}
+
+Double_t AliGenMUONlib::YChi_c(Double_t *py, Double_t */*dummy*/)
+{
+// Chi_c family y
+ const Double_t ky0 = 4.;
+ const Double_t kb=1.;
+ Double_t yj;
+ Double_t y=TMath::Abs(*py);
+ //
+ if (y < ky0)
+ yj=kb;
+ else
+ yj=kb*TMath::Exp(-(y-ky0)*(y-ky0)/2);
+ return yj;
+}
+
+// particle composition
+//
+Int_t AliGenMUONlib::IpChi_c0(TRandom *)
+{
+// Chi composition
+ return 10441;
+}
+//
+Int_t AliGenMUONlib::IpChi_c1(TRandom *)
+{
+// Chi composition
+ return 20443;
+}
+Int_t AliGenMUONlib::IpChi_c2(TRandom *)
+{
+// Chi_c2 prime composition
+ return 445;
+}
+Int_t AliGenMUONlib::IpChi_c(TRandom *)
+{
+// Chi composition
+ Int_t ip;
+ Float_t r = gRandom->Rndm();
+ if (r < 0.001) {
+ ip = 10441;
+ } else if( r < 0.377 ) {
+ ip = 20443;
+ } else {
+ ip = 445;
+ }
+ return ip;
+}
+
+
+//_____________________________________________________________
+
typedef Int_t (*GenFuncIp) (TRandom *);
GenFuncIp AliGenMUONlib::GetIp(Int_t param, const char* /*tname*/) const
{
case kKaon:
func=IpKaon;
break;
+ case kChi_c0:
+ func=IpChi_c0;
+ break;
+ case kChi_c1:
+ func=IpChi_c1;
+ break;
+ case kChi_c2:
+ func=IpChi_c2;
+ break;
+ case kChi_c:
+ func=IpChi_c;
+ break;
default:
func=0;
printf("<AliGenMUONlib::GetIp> unknown parametrisation\n");
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff