TConstants.h

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#ifndef RAD_TConstants
#define RAD_TConstants
 
#include <cmath>
#include <iostream>
#define M_ALPHA 0.00729735307964482 //  = 1/137.0359895
#define M_HC 197.327053
#define M_ME 0.51099907
#define M_MMU 105.658357
#define M_MTAU 1776.99
#define M_MPI 139.57018
#define M_MK0 497.672
#define M_MKC 493.677
#define M_META 547.75
class TConstants {
protected:
  double fAlphaScale;
  double fAlpha;
  double fAlpha2;
  double fAlpha3;
  double fAlphaPi;
 
public:
  TConstants() {
    fAlphaScale = 1;
    Init();
  };
  ~TConstants(){};
  void Init() {
    fAlpha   = M_ALPHA * fAlphaScale;
    fAlpha2  = fAlpha * fAlpha;
    fAlpha3  = fAlpha2 * fAlpha;
    fAlphaPi = fAlpha / M_PI;
  }
  void SetAlphaScale( const double& x ) {
    fAlphaScale = x;
    Init();
  }
  inline double GetAlphaScale() { return fAlphaScale; }
  inline double Alpha() { return fAlpha; }
  inline double Alpha2() { return fAlpha2; }
  inline double Alpha3() { return fAlpha3; }
  static double Pi() { return M_PI; }
  static double Pi2() { return M_PI * M_PI; }
  inline double AlphaPi() { return fAlphaPi; }
  static double HC() { return M_HC; }
  static double HC2() { return M_HC * M_HC; }
  static double Me() { return M_ME; }
  static double Me2() { return M_ME * M_ME; }
  static double Mmu() { return M_MMU; }
  static double Mmu2() { return M_MMU * M_MMU; }
  static double Mtau() { return M_MTAU; }
  static double Mtau2() { return M_MTAU * M_MTAU; }
  static double Mpi() { return M_MPI; }
  static double Mpi2() { return M_MPI * M_MPI; }
  static double Meta() { return M_META; }
  static double Meta2() { return M_META * M_META; }
  static double MK0() { return M_MK0; }
  static double MK02() { return M_MK0 * M_MK0; }
  static double MKC() { return M_MKC; }
  static double MKC2() { return M_MKC * M_MKC; }
  void          Print() { std::cout << "Alpha scale      = " << fAlphaScale << std::endl; }
};
 
extern TConstants* gConst;
 
#endif // #ifndef RAD_TConstants