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1 | #ifndef ALIBOOST_H | |
2 | #define ALIBOOST_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | // $Id$ | |
7 | ||
8 | #include <math.h> | |
9 | ||
10 | #include "TObject.h" | |
11 | ||
12 | #include "Ali4Vector.h" | |
13 | ||
14 | class AliBoost : public TObject | |
15 | { | |
16 | public: | |
17 | AliBoost(); // Default constructor | |
18 | virtual ~AliBoost(); // Default destructor | |
19 | AliBoost(const AliBoost& b); // Copy constructor | |
20 | void SetBeta(Ali3Vector& b); // Set boost parameters by beta 3-vector | |
21 | void Set4Momentum(Ali4Vector& p); // Set boost parameters by 4-momentum | |
22 | Ali3Vector GetBetaVector() const; // Provide the beta 3-vector | |
23 | Double_t GetBeta(); // Provide norm of beta 3-vector | |
24 | Double_t GetGamma(); // Provide gamma value | |
25 | void Data(TString f="car"); // Print boost parameter info in coord. frame f | |
26 | Ali4Vector Boost(Ali4Vector& v); // Perform Lorentz boost on 4-vector v | |
27 | Ali4Vector Inverse(Ali4Vector& v); // Perform inverse Lorentz boost on 4-vector v | |
28 | Double_t GetResultError() const; // Provide error on scalar result | |
29 | ||
30 | protected: | |
31 | Ali3Vector fBeta; // The beta 3-vector | |
32 | Double32_t fGamma; // The gamma factor | |
33 | Double32_t fDgamma; // Error on the gamma value | |
34 | Double32_t fDresult; //! Error on scalar result | |
35 | ||
36 | ClassDef(AliBoost,5) // Perform various Lorentz transformations. | |
37 | }; | |
38 | #endif |