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GenericFunctions/SphericalBessel.hh
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1 // -*- C++ -*-
2 // $Id: SphericalBessel.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
3 //---------------------SphericalBessel--------------------------------------//
4 // //
5 // Class SphericalBessel. An spherical bessel function of integral order //
6 // Joe Boudreau, Petar Maksimovic, January 2000 //
7 // //
8 //--------------------------------------------------------------------------//
9 #ifndef SphericalBessel_h
10 #define SphericalBessel_h 1
13 namespace Genfun {
14 
19  class SphericalBessel : public AbsFunction {
20 
22 
23  public:
24 
25  // Constructor
26  SphericalBessel(unsigned int l);
27 
28  // Copy constructor
29  SphericalBessel(const SphericalBessel &right);
30 
31  // Destructor
32  virtual ~SphericalBessel();
33 
34  // Retreive function value
35  virtual double operator ()(double argument) const;
36  virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
37 
38  // Get the integer variable l
39  unsigned int l() const;
40 
41  private:
42 
43  // It is illegal to assign a spherical bessel
44  const SphericalBessel & operator=(const SphericalBessel &right);
45 
46  // Here is the index
47  unsigned int _l;
48 
49  };
50 } // namespace Genfun
51 #include "CLHEP/GenericFunctions/SphericalBessel.icc"
52 #endif