CLHEP/GenericFunctions/RelativisticBW.hh

0001 // -*- C++ -*-
0002 // $Id:
0003 //---------------------RelativisticBWDistribution---------------------------//
0004 //                                                                          //
0005 //                                                                          //
0006 // Joe Boudreau, June 2011                                                  //
0007 //                                                                          //
0008 //--------------------------------------------------------------------------//
0009 #ifndef RelativisticBWDistribution_h
0010 #define RelativisticBWDistribution_h 1
0011 #include "CLHEP/GenericFunctions/AbsFunction.hh"
0012 #include "CLHEP/GenericFunctions/Parameter.hh"
0013 #include "CLHEP/GenericFunctions/IncompleteGamma.hh"
0014 namespace Genfun {
0015
0016   /**
0017    * @author
0018    * @ingroup genfun
0019    */
0020   class RelativisticBWDistribution : public AbsFunction  {
0021
0022     FUNCTION_OBJECT_DEF(RelativisticBWDistribution)
0023
0024       public:
0025
0026     // Constructor
0027     RelativisticBWDistribution();
0028
0029     // Copy constructor
0030     RelativisticBWDistribution(const RelativisticBWDistribution &right);
0031
0032     // Destructor
0033     virtual ~RelativisticBWDistribution();
0034
0035     // Retreive function value
0036     virtual double operator ()(double argument) const override;
0037     virtual double operator ()(const Argument & a) const override {return operator() (a[0]);}
0038
0039     // Get the paramter alpha
0040     Parameter & mass();
0041
0042     // Get the parameter beta
0043     Parameter & width();
0044
0045
0046   private:
0047
0048     // It is illegal to assign an adjustable constant
0049     const RelativisticBWDistribution & operator=(const RelativisticBWDistribution &right);
0050
0051     // Here are the two parameters alpha and beta:
0052
0053     Parameter       _mass;
0054     Parameter       _width;
0055
0056
0057
0058   };
0059 } // namespace Genfun
0060 #endif