SphericalBessel.hh

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// -*- C++ -*-
// $Id: SphericalBessel.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
//---------------------SphericalBessel--------------------------------------//
//                                                                          //
// Class SphericalBessel.  An spherical bessel function of integral order   //
// Joe Boudreau, Petar Maksimovic, January 2000                             //
//                                                                          //
//--------------------------------------------------------------------------//
#ifndef SphericalBessel_h
#define SphericalBessel_h 1
#include "CLHEP/GenericFunctions/AbsFunction.hh"
#include "CLHEP/GenericFunctions/Parameter.hh"
namespace Genfun {
 
  /**
   * @author
   * @ingroup genfun
   */
  class SphericalBessel : public AbsFunction  {
 
    FUNCTION_OBJECT_DEF(SphericalBessel)
 
      public:
 
    // Constructor
    SphericalBessel(unsigned int l);
 
    // Copy constructor
    SphericalBessel(const SphericalBessel &right);
  
    // Destructor
    virtual ~SphericalBessel();
  
    // Retreive function value
    virtual double operator ()(double argument) const override;
    virtual double operator ()(const Argument & a) const override {return operator() (a[0]);}
  
    // Get the integer variable l
    unsigned int l() const;
 
  private:
 
    // It is illegal to assign a spherical bessel
    const SphericalBessel & operator=(const SphericalBessel &right);
 
    // Here is the index
    unsigned int _l;
  
  };
} // namespace Genfun
#include "CLHEP/GenericFunctions/SphericalBessel.icc"
#endif