Have ProdProcess return const char*
[u/mrichter/AliRoot.git] / RALICE / AliTrack.h
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d88f97cc 1#ifndef ALITRACK_H
2#define ALITRACK_H
3da30618 3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6/* $Id$ */
7
d88f97cc 8///////////////////////////////////////////////////////////////////////////
9// Class AliTrack
10// Handling of the attributes of a reconstructed particle track.
11//
12// Coding example :
13// ----------------
14//
15// Float_t a[4]={195.,1.2,-0.04,8.5};
16// Ali4Vector pmu;
17// pmu.SetVector(a,"car");
18// AliTrack t1;
19// t1.Set4Momentum(pmu);
20//
21// Float_t b[3]={1.2,-0.04,8.5};
22// Ali3Vector p;
23// p.SetVector(b,"car");
24// AliTrack t2;
25// t2.Set3Momentum(p);
26// t2.SetCharge(0);
27// t2.SetMass(1.115);
28//
29// t1.Info();
30// t2.Info();
31//
32// Float_t pi=acos(-1.);
33// Float_t thcms=0.2*pi; // decay theta angle in cms
34// Float_t phicms=pi/4.; // decay theta angle in cms
35// Float_t m1=0.938;
36// Float_t m2=0.140;
37// t2.Decay(m1,m2,thcms,phicms); // Track t2 decay : Lambda -> proton + pion
38//
39// t2.List();
40//
41// Int_t ndec=t2.GetNdecay();
42// AliTrack* d1=t2.GetDecayTrack(1); // Access to decay track number 1
43// AliTrack* d2=t2.GetDecayTrack(2); // Access to decay track number 2
44//
45// Note : All quantities are in GeV, GeV/c or GeV/c**2
46//
47//--- NvE 10-jul-1997 UU-SAP Utrecht
48//--- Modified : NvE 06-apr-1999 UU-SAP Utrecht to inherit from Ali4Vector
49///////////////////////////////////////////////////////////////////////////
50
51#include "TObject.h"
52#include "TObjArray.h"
53
54#include "AliBoost.h"
55
56class AliTrack : public TObject,public Ali4Vector
57{
58 public:
59 AliTrack(); // Default constructor
60 ~AliTrack(); // Destructor
61 void Reset(); // Reset all values to 0
62 void Set4Momentum(Ali4Vector& p); // Set track 4-momentum
63 void Set3Momentum(Ali3Vector& p); // Set track 3-momentum
64 void SetMass(Double_t m); // Set particle mass
65 void SetCharge(Float_t q); // Set particle charge
66 void Info(TString f="car"); // Print track information for coord. frame f
67 void List(TString f="car"); // Print track and decay level 1 information for coord. frame f
68 void ListAll(TString f="car"); // Print track and all decay level information for coord. frame f
69 Ali3Vector Get3Momentum(); // Provide track 3-momentum
70 Double_t GetMomentum(); // Provide value of track 3-momentum
71 Double_t GetMass(); // Provide particle mass
72 Float_t GetCharge(); // Provide particle charge
73 Double_t GetEnergy(); // Provide particle total energy
74 void Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms); // Perform 2-body decay
75 Int_t GetNdecay(); // Provide number of decay products
76 AliTrack* GetDecayTrack(Int_t j); // Access to decay produced track number j
77
78 protected:
79 Double_t fM; // The mass of the particle
80 Float_t fQ; // The charge of the particle
81 Int_t fNdec; // The number of decay products
82 TObjArray* fDecays; // The array of decay produced tracks for output
83
84 private:
85 void Dump(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels
86
87 ClassDef(AliTrack,1) // Class definition to enable ROOT I/O
88};
89#endif