Herwig/Analysis/DrellYanPT.h

0001 // -*- C++ -*-
0002 #ifndef HERWIG_DrellYanPT_H
0003 #define HERWIG_DrellYanPT_H
0004 //
0005 // This is the declaration of the DrellYanPT class.
0006 //
0007
0008 #include "ThePEG/Handlers/AnalysisHandler.h"
0009
0010 #include "Herwig/Utilities/Histogram.h"
0011
0012 namespace Herwig {
0013
0014 using namespace ThePEG;
0015
0016 /** \ingroup Analysis
0017  *
0018  * This AnalysisHandler books histograms
0019  * of the weak boson's pt in Drell-Yan
0020  * processes.
0021  *
0022  * An Interface switch allows you to choose
0023  * between output of the histograms
0024  * as TopDraw or plain ASCII files, which
0025  * may be processed further, e.g. by gnuplot.
0026  *
0027  * @see \ref DrellYanPTInterfaces "The interfaces"
0028  * defined for DrellYanPT.
0029  */
0030 class DrellYanPT: public AnalysisHandler {
0031
0032 public:
0033
0034   /**
0035    * The default constructor.
0036    */
0037   DrellYanPT();
0038
0039   /** @name Virtual functions required by the AnalysisHandler class. */
0040   //@{
0041   /**
0042    * Analyze a given Event. Note that a fully generated event
0043    * may be presented several times, if it has been manipulated in
0044    * between. The default version of this function will call transform
0045    * to make a lorentz transformation of the whole event, then extract
0046    * all final state particles and call analyze(tPVector) of this
0047    * analysis object and those of all associated analysis objects. The
0048    * default version will not, however, do anything on events which
0049    * have not been fully generated, or have been manipulated in any
0050    * way.
0051    * @param event pointer to the Event to be analyzed.
0052    * @param ieve the event number.
0053    * @param loop the number of times this event has been presented.
0054    * If negative the event is now fully generated.
0055    * @param state a number different from zero if the event has been
0056    * manipulated in some way since it was last presented.
0057    */
0058   virtual void analyze(tEventPtr event, long ieve, int loop, int state);
0059   //@}
0060
0061 public:
0062
0063   /**
0064    * The standard Init function used to initialize the interfaces.
0065    * Called exactly once for each class by the class description system
0066    * before the main function starts or
0067    * when this class is dynamically loaded.
0068    */
0069   static void Init();
0070
0071 protected:
0072
0073   /** @name Clone Methods. */
0074   //@{
0075   /**
0076    * Make a simple clone of this object.
0077    * @return a pointer to the new object.
0078    */
0079   virtual IBPtr clone() const {return new_ptr(*this);}
0080
0081   /** Make a clone of this object, possibly modifying the cloned object
0082    * to make it sane.
0083    * @return a pointer to the new object.
0084    */
0085   virtual IBPtr fullclone() const {return new_ptr(*this);}
0086   //@}
0087
0088 protected:
0089
0090   /** @name Standard Interfaced functions. */
0091   //@{
0092
0093   /**
0094    * Finalize this object. Called in the run phase just after a
0095    * run has ended. Used eg. to write out statistics.
0096    */
0097   virtual void dofinish();
0098   //@}
0099
0100 private:
0101
0102   /**
0103    * Histogram of the Z's pt
0104    */
0105   Histogram _Zpt;
0106
0107   /**
0108    * Histogram of the W+'s pt
0109    */
0110   Histogram _Wppt;
0111
0112   /**
0113    * Histogram of the W-'s pt
0114    */
0115   Histogram _Wmpt;
0116
0117   /**
0118    * The assignment operator is private and must never be called.
0119    * In fact, it should not even be implemented.
0120    */
0121   DrellYanPT & operator=(const DrellYanPT &) = delete;
0122
0123 };
0124
0125 }
0126
0127 #endif /* HERWIG_DrellYanPT_H */