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Add optional seeding in the TRD (M.Ivanov)
[u/mrichter/AliRoot.git] / ANALYSIS / AliD0toKpi.h
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3a9a3487 1#ifndef AliD0toKpi_H
2#define AliD0toKpi_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6//-------------------------------------------------------------------------
7// Class AliD0toKpi
8// Reconstructed D0 -> K^- pi^+ class
9//
10// Origin: A. Dainese andrea.dainese@pd.infn.it
11//-------------------------------------------------------------------------
12
7b84ea57 13#include <TObject.h>
3a9a3487 14#include <TMath.h>
3a9a3487 15
16//----------------------------------------------------------------------------
17// Some constants (masses + parameterized TOF PID)
18//
19// particle masses
20const Double_t kMD0 = 1.8645; // D0 mass
21const Double_t kMK = 0.49368; // K+ mass
22const Double_t kMPi = 0.13957; // Pi+ mass
23
24// --- TOF tagging probabilities ---
25// central HIJING
26// B = 0.4 T
27// tracking errors in TPC included
28// With TRD
29//
30// *** Pb-Pb dNch/dy=6000 ***
31//
32// PIONS
741f4d30 33const Int_t kPiBinsPbPb = 10;
34const Double_t kPiBinWidthPbPb = 0.250;
35const Double_t kPiTagPiPbPb[kPiBinsPbPb] = {0.211421,0.652184,0.624421,0.614727,0.610777,0.628015,0.631520,0.630324,0.637551,0.575235};
36const Double_t kPiTagNidPbPb[kPiBinsPbPb] = {0.788579,0.347816,0.375579,0.385273,0.389223,0.371985,0.368480,0.369676,0.362449,0.424765};
3a9a3487 37// KAONS
741f4d30 38const Int_t kKBinsPbPb = 10;
39const Double_t kKBinWidthPbPb = 0.250;
40const Double_t kKTagKPbPb[kKBinsPbPb] = {0.000000,0.101255,0.397662,0.467586,0.517008,0.555023,0.584185,0.519029,0.464117,0.247308};
41const Double_t kKTagPiPbPb[kKBinsPbPb] = {0.102049,0.289930,0.101930,0.057771,0.040286,0.028567,0.053108,0.094369,0.066302,0.247308};
42const Double_t kKTagNidPbPb[kKBinsPbPb] = {0.897951,0.608815,0.500408,0.474643,0.442705,0.416410,0.362707,0.386603,0.469580,0.505383};
3a9a3487 43// PROTONS
741f4d30 44const Int_t kPBinsPbPb = 9;
45const Double_t kPBinWidthPbPb = 0.500;
46const Double_t kPTagPPbPb[kPBinsPbPb] = {0.017940,0.350681,0.535286,0.583264,0.562935,0.560524,0.545992,0.598060,0.351245};
47const Double_t kPTagPiPbPb[kPBinsPbPb] = {0.195955,0.094949,0.039962,0.026039,0.007556,0.016986,0.030333,0.000000,0.000000};
48const Double_t kPTagNidPbPb[kPBinsPbPb] = {0.786105,0.554370,0.424751,0.390697,0.429508,0.422491,0.423675,0.401940,0.648755};
3a9a3487 49//
50// pp PYTHIA
51//
52// *** cuts for pp ***
53//
54// PIONS
741f4d30 55const Int_t kPiBinsPP = 10;
56const Double_t kPiBinWidthPP = 0.250;
57const Double_t kPiTagPiPP[kPiBinsPP] = {0.194528,0.447097,0.603364,0.646413,0.647125,0.669157,0.688139,0.682564,0.689910,0.665710};
58const Double_t kPiTagNidPP[kPiBinsPP] = {0.805472,0.552903,0.396636,0.353587,0.352875,0.330843,0.311861,0.317436,0.310090,0.334290};
3a9a3487 59// KAONS
741f4d30 60const Int_t kKBinsPP = 10;
61const Double_t kKBinWidthPP = 0.250;
62const Double_t kKTagKPP[kKBinsPP] = {0.000000,0.173393,0.439690,0.519423,0.587025,0.605372,0.586021,0.650139,0.444444,0.299363};
63const Double_t kKTagPiPP[kKBinsPP] = {0.000000,0.001495,0.000000,-0.000000,-0.000000,0.000000,0.032258,0.060572,0.101449,0.242038};
64const Double_t kKTagNidPP[kKBinsPP] = {1.000000,0.825112,0.560310,0.480577,0.412975,0.394628,0.381720,0.289289,0.454106,0.458599};
3a9a3487 65// PROTONS
741f4d30 66const Int_t kPBinsPP = 9;
67const Double_t kPBinWidthPP = 0.500;
68const Double_t kPTagPPP[kPBinsPP] = {0.029404,0.438640,0.613710,0.665152,0.634961,0.657711,0.703704,0.685714,0.235294};
69const Double_t kPTagPiPP[kPBinsPP] = {0.000000,0.000000,0.000000,-0.000000,0.000000,0.000000,-0.000000,0.014286,-0.000000};
70const Double_t kPTagNidPP[kPBinsPP] = {0.970596,0.561360,0.386290,0.334848,0.365039,0.342289,0.296296,0.300000,0.764706};
3a9a3487 71
72
73
74
75//-----------------------------------------------------------------------------
76class AliD0toKpi : public TObject {
77 public:
78 //
79 AliD0toKpi();
80 AliD0toKpi(Int_t ev,Int_t trkNum[2],
81 Double_t v1[3],Double_t v2[3],Double_t dca,
82 Double_t mom[6],Double_t d0[2]);
83 virtual ~AliD0toKpi();
84 AliD0toKpi(const AliD0toKpi& d0toKpi);
85
86 Double_t Alpha() const { return (Ql(0)-Ql(1))/(Ql(0)+Ql(1)); }
7b84ea57 87 void ApplyPID(const Char_t * pidScheme="TOFparamPbPb");
3a9a3487 88 Double_t ChildrenRelAngle() const;
89 void ComputeWgts();
90 void CorrectWgt4BR(Double_t factor);
91 Double_t CosPointing() const;
92 Double_t CosPointingXY() const;
741f4d30 93 void CosThetaStar(Double_t &ctsD0,Double_t &ctsD0bar) const;
3a9a3487 94 Double_t Ct() const {return Length()*kMD0/P();}
95 Double_t Energy() const { return TMath::Sqrt(P()*P()+kMD0*kMD0); }
96 Double_t Eta() const;
97 Double_t EtaChild(Int_t child) const;
98 Int_t EventNo() const {return TMath::Abs(fEvent);}
99 Double_t GetDCA() const { return 10000.*fDCA; }
100 Int_t GetTrkNum(Int_t child) const { return fTrkNum[child]; }
101 Double_t Getd0Child(Int_t child) const { return fd0[child]; }
102 Int_t GetPdgChild(Int_t child) const { return fPdg[child]; }
103 Int_t GetPdgMum(Int_t child) const {return fMum[child]; }
741f4d30 104 void GetWgts(Double_t &WgtD0,Double_t &WgtD0bar,TString sample) const;
3a9a3487 105 void GetPrimaryVtx(Double_t vtx[3]) const
7b84ea57 106 { vtx[0]=fV1x; vtx[1]=fV1y; vtx[2]=fV1z; }
3a9a3487 107 void GetSecondaryVtx(Double_t vtx[3]) const
7b84ea57 108 { vtx[0]=fV2x; vtx[1]=fV2y; vtx[2]=fV2z; }
3a9a3487 109
741f4d30 110 void InvMass(Double_t &mD0,Double_t &mD0bar) const;
3a9a3487 111 Bool_t IsSignal() const { if(fSignal) return kTRUE; return kFALSE; }
112 Double_t Length() const
113 { return TMath::Sqrt((fV1x-fV2x)*(fV1x-fV2x)
114 +(fV1y-fV2y)*(fV1y-fV2y)+(fV1z-fV2z)*(fV1z-fV2z)); }
115 Double_t P() const { return TMath::Sqrt(Pt()*Pt()+Pz()*Pz()); }
116 Double_t PChild(Int_t child) const { return TMath::Sqrt(fPx[child]*fPx[child]+fPy[child]*fPy[child]+fPz[child]*fPz[child]); }
117 Double_t ProdImpParams() const { return fd0[0]*fd0[1]; }
118 Double_t Pt() const { return TMath::Sqrt(Px()*Px()+Py()*Py()); }
119 Double_t PtChild(Int_t child) const { return TMath::Sqrt(fPx[child]*fPx[child]+fPy[child]*fPy[child]); }
120 Double_t Px() const { return (fPx[0]+fPx[1]); }
121 Double_t Py() const { return (fPy[0]+fPy[1]); }
122 Double_t Pz() const { return (fPz[0]+fPz[1]); }
123 Double_t Ql(Int_t child) const;
124 Double_t Qt() const;
125 Double_t Rapidity() const { return 0.5*TMath::Log((Energy()+Pz())/(Energy()-Pz()+1.e-13)); }
741f4d30 126 Bool_t Select(const Double_t* cuts,Int_t& okD0,Int_t& okD0bar) const;
3a9a3487 127 void SetPrimaryVtx(Double_t vtx[3])
7b84ea57 128 { fV1x=vtx[0]; fV1y=vtx[1]; fV1z=vtx[2]; }
129 void SetSignal() { fSignal = kTRUE; }
3a9a3487 130 void SetTOFmasses(Double_t mass[2])
7b84ea57 131 { fTOFmass[0]=mass[0]; fTOFmass[1]=mass[1]; }
3a9a3487 132 void SetPIDresponse(Double_t resp0[5],Double_t resp1[5]);
7b84ea57 133 void SetPdgCodes(Int_t pdg[2]) {fPdg[0]=pdg[0];fPdg[1]=pdg[1]; }
134 void SetMumPdgCodes(Int_t mum[2]) {fMum[0]=mum[0];fMum[1]=mum[1]; }
3a9a3487 135
7b84ea57 136 void DrawPIDinTOF(const Char_t * pidScheme="TOFparamPbPb") const;
3a9a3487 137 Double_t LinearInterpolation(Double_t p,Int_t nBins,Double_t Bin,
138 const Double_t *values) const;
139 // void SetPtWgts4pp();
140 //
141 private:
142 //
143 Bool_t fSignal; // TRUE if signal, FALSE if background (for simulation)
144 Int_t fEvent; // number of the event this D0 comes from
145 // -1 if the D0 comes from ev. mixing
146
147 Int_t fTrkNum[2]; // numbers of the two decay tracks
148
741f4d30 149 Double_t fV1x; // X-position of the primary vertex of the event
150 Double_t fV1y; // Y-position of the primary vertex of the event
151 Double_t fV1z; // Z-position of the primary vertex of the event
152 Double_t fV2x; // X-position of the reconstructed secondary vertex
153 Double_t fV2y; // Y-position of the reconstructed secondary vertex
154 Double_t fV2z; // Z-position of the reconstructed secondary vertex
3a9a3487 155 Double_t fDCA; // DCA of the two tracks
156
741f4d30 157 Double_t fPx[2]; // X,Y,Z-
3a9a3487 158 Double_t fPy[2]; // momenta of the two tracks
159 Double_t fPz[2]; // at the reconstructed vertex
160
161 Double_t fd0[2]; // impact parameters in the bending plane
162
163 Int_t fPdg[2]; // PDG codes of the two tracks (for sim.)
164 Int_t fMum[2]; // PDG codes of the mothers (for sim.)
165
166 Double_t fTagPi[2]; // probability to be tagged as pion
167 Double_t fTagKa[2]; // probability to be tagged as kaon
168 Double_t fTagPr[2]; // probability to be tagged as proton
169 Double_t fTagNid[2]; // probability to be tagged as "non-identified"
170
171 Double_t fPIDrespEl[2]; // det. response to be electron
172 Double_t fPIDrespMu[2]; // det. response to be muon
173 Double_t fPIDrespPi[2]; // det. response to be pion
174 Double_t fPIDrespKa[2]; // det. response to be kaon
175 Double_t fPIDrespPr[2]; // det. response to be proton
176 Double_t fTOFmass[2]; // mass estimated by the TOF (-1000. if track not reached TOF)
177
741f4d30 178 Double_t fWgtAD0,fWgtAD0bar; // weights for the 3 samples
3a9a3487 179 Double_t fWgtBD0,fWgtBD0bar; // weights for the 3 samples
180 Double_t fWgtCD0,fWgtCD0bar; // A: (K,Pi)+(K,?) B: (?,Pi) C: (?,?)
181 Double_t fWgtDD0,fWgtDD0bar; // D: all other pairs
182
183 ClassDef(AliD0toKpi,1) // Reconstructed D0 candidate class
184};
185
186#endif
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