DDVCS/cross_section/DDVCSCrossSectionUUMinusDVCSLimit.h

0001 #ifndef DDVCSCROSSSECTIONUUMINUSDVCSLIMIT_H
0002 #define DDVCSCROSSSECTIONUUMINUSDVCSLIMIT_H
0003
0004 /**
0005  * @file DDVCSCrossSectionUUMinusDVCSLimit.h
0006  * @author Pawel Sznajder (IPNO)
0007  * @date November 25, 2016
0008  * @version 1.0
0009  */
0010
0011 #include <stddef.h>
0012 #include <string>
0013
0014 #include "../../../../beans/gpd/GPDType.h"
0015 #include "../../../../beans/List.h"
0016 #include "../../../../utils/type/PhysicalType.h"
0017 #include "../DDVCSObservable.h"
0018
0019 namespace PARTONS {
0020
0021 /**
0022  * @class DDVCSCrossSectionUUMinusDVCSLimit
0023  * @brief Unpolarized cross-section for negative beam charge - DVCS limit.
0024  *
0025  * Unit: \f$\mathrm{nbarn}/\mathrm{GeV}^4\f$.
0026  */
0027 class DDVCSCrossSectionUUMinusDVCSLimit: public DDVCSObservable {
0028
0029 public:
0030
0031     /**
0032      * Unique ID to automatically register the class in the registry.
0033      */
0034     static const unsigned int classId;
0035
0036     /**
0037      * Function for the integration.
0038      */
0039     static double DDVCSCrossSectionUUMinusDVCSLimitFunction(double* kin,
0040             size_t dim, void* par);
0041
0042     /**
0043      * Constructor.
0044      * @param className Name of class.
0045      */
0046     DDVCSCrossSectionUUMinusDVCSLimit(const std::string &className);
0047
0048     /**
0049      * Destructor.
0050      */
0051     virtual ~DDVCSCrossSectionUUMinusDVCSLimit();
0052
0053     virtual DDVCSCrossSectionUUMinusDVCSLimit* clone() const;
0054
0055 protected:
0056
0057     /**
0058      * Copy constructor.
0059      * @param other Object to be copied.
0060      */
0061     DDVCSCrossSectionUUMinusDVCSLimit(
0062             const DDVCSCrossSectionUUMinusDVCSLimit &other);
0063
0064     virtual PhysicalType<double> computeObservable(
0065             const DDVCSObservableKinematic& kinematic,
0066             const List<GPDType>& gpdType);
0067 };
0068
0069 struct DDVCSCrossSectionUUMinusDVCSLimitParameters {
0070
0071     DDVCSCrossSectionUUMinusDVCSLimit* m_pDDVCSCrossSectionUUMinusDVCSLimit; ///< Pointer to DDVCSCrossSectionUUMinusDVCSLimit.
0072     double m_xB, m_t, m_Q2, m_Q2Prim, m_E, m_phi;
0073     List<GPDType> m_gpdType; ///< GPD types.
0074 };
0075
0076 } /* namespace PARTONS */
0077
0078 #endif /* DDVCSCROSSSECTIONUUMINUSDVCSLIMIT_H */