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LPairAnalysis.h
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// -*- C++ -*-
#ifndef HERWIG_LPairAnalysis_H
#define HERWIG_LPairAnalysis_H
//
// This is the declaration of the LPairAnalysis class.
//
#include "ThePEG/Repository/CurrentGenerator.h"
#include "ThePEG/Handlers/AnalysisHandler.h"
#include "Herwig++/Utilities/Histogram.h"
namespace Herwig {
using namespace ThePEG;
/** \ingroup Analysis
* The LPairAnalysis class is designed to analyse lepton pairs.
* Therefore the lepton and antilepton with highest pt are selected from
* the event and some observables are computed and booked into
* histograms. The analysis is intended to anaylse top pair events
* where both W's are decaying semileptonically. Therefore, only the
* semileptonic top quark decay channels should be switched on. If no
* pair of (opposite sign) leptons is found in the final state a warning
* message is printed and nothing is booked. Output is created as
* topdrawer file
*
* @see \ref LPairAnalysisInterfaces "The interfaces"
* defined for LPairAnalysis.
*/
class LPairAnalysis: public AnalysisHandler {
public:
/**
* The default constructor.
*/
LPairAnalysis();
/** @name Virtual functions required by the AnalysisHandler class. */
//@{
/**
* Analyze a given Event. Note that a fully generated event
* may be presented several times, if it has been manipulated in
* between. The default version of this function will call transform
* to make a lorentz transformation of the whole event, then extract
* all final state particles and call analyze(tPVector) of this
* analysis object and those of all associated analysis objects. The
* default version will not, however, do anything on events which
* have not been fully generated, or have been manipulated in any
* way.
* @param event pointer to the Event to be analyzed.
* @param ieve the event number.
* @param loop the number of times this event has been presented.
* If negative the event is now fully generated.
* @param state a number different from zero if the event has been
* manipulated in some way since it was last presented.
*/
virtual void analyze(tEventPtr event, long ieve, int loop, int state);
//@}
public:
/**
* The standard Init function used to initialize the interfaces.
* Called exactly once for each class by the class description system
* before the main function starts or
* when this class is dynamically loaded.
*/
static void Init();
protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const {return new_ptr(*this);}
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const {return new_ptr(*this);}
//@}
protected:
/** @name Standard Interfaced functions. */
//@{
/**
* Finalize this object. Called in the run phase just after a
* run has ended. Used eg. to write out statistics.
*/
virtual void dofinish();
private:
/**
* The static object used to initialize the description of this class.
* Indicates that this is a concrete class without persistent data.
*/
static NoPIOClassDescription<LPairAnalysis> initLPairAnalysis;
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
LPairAnalysis & operator=(const LPairAnalysis &);
private:
/**
* \f$p_T\f$ of the leptons
*/
Histogram _ptp;
Histogram _ptm;
Histogram _ptpair;
/**
* \f$E_T\f$ of the leptons
*/
Histogram _etp;
Histogram _etm;
Histogram _etpair;
/**
* Energy of the leptons
*/
Histogram _ep;
Histogram _em;
Histogram _epair;
/**
* Rapidity of the leptons
*/
Histogram _rapp;
Histogram _rapm;
Histogram _rappair;
/**
* Azimuth of the leptons
*/
Histogram _phip;
Histogram _phim;
Histogram _deltaphi;
/**
* Invariant mass of the pair
*/
Histogram _mpair;
/**
* scalar sums of Et, pt
*/
Histogram _etsum;
Histogram _ptsum;
};
}
#include "ThePEG/Utilities/ClassTraits.h"
namespace ThePEG {
/** @cond TRAITSPECIALIZATIONS */
/** This template specialization informs ThePEG about the
* base classes of LPairAnalysis. */
template <>
struct BaseClassTrait<Herwig::LPairAnalysis,1> {
/** Typedef of the first base class of LPairAnalysis. */
typedef AnalysisHandler NthBase;
};
/** This template specialization informs ThePEG about the name of
* the LPairAnalysis class and the shared object where it is defined. */
template <>
struct ClassTraits<Herwig::LPairAnalysis>
: public ClassTraitsBase<Herwig::LPairAnalysis> {
/** Return a platform-independent class name */
static string className() { return "Herwig::LPairAnalysis"; }
/** Return the name(s) of the shared library (or libraries) be loaded to get
* access to the LPairAnalysis class and any other class on which it depends
* (except the base class). */
static string library() { return "HwAnalysis.so"; }
};
/** @endcond */
}
#endif /* HERWIG_LPairAnalysis_H */

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