[u/mrichter/AliRoot.git] / TEPEMGEN / AliGenQEDBg.h

#ifndef ALIGENQEDBG_H
#define ALIGENQEDBG_H
/* Copyright(c) 1998-2002, ALICE Experiment at CERN, All rights reserved. *
 * Copyright(c) 1997, 1998, 2002, Adrian Alscher and Kai Hencken          *
 * Copyright(c) 2002 Kai Hencken, Yuri Kharlov, Serguei Sadovsky          *
 * See cxx source for full Copyright notice                               */

/* $Id$ */
// Event generator of single e+e- pair production in ultraperipheral PbPb collisions
// at 5.5 TeV/nucleon.
// Author: Yuri.Kharlov@cern.ch
// 9 October 2002

#include "AliGenMC.h"
#include "AliGenEventHeader.h"
#include "AliGenEpEmv1.h"

//-------------------------------------------------------------
class AliGenQEDBg : public AliGenEpEmv1
{
public:
  AliGenQEDBg();
  
  virtual ~AliGenQEDBg();
  virtual void Generate();
  virtual void Init();
  //
  Double_t  GetLuminosity()       const {return fLumi;}
  Double_t  GetIntegrationTime()  const {return fIntTime;}
  Double_t  GetXSection()         const {return fXSection;}
  Double_t  GetXSectionEps()      const {return fXSectionEps;}
  Double_t  GetMeanNPairs()       const {return fPairsInt;}
  //
  void      SetLumiIntTime(double lumi, double intTime);
  void      SetXSectionEps(double eps=1e-2)  {fXSectionEps = eps>0 ? eps:1e-2;}
  void      SetMinMaxXSTest(double mn,double mx);
  //
 protected:
  AliGenQEDBg(const AliGenQEDBg & gen);
  AliGenQEDBg & operator=(const AliGenQEDBg & gen);
  //
  Double_t   fLumi;         // beam luminsity
  Double_t   fXSection;     // estimated cross section in k-barns
  Double_t   fXSectionEps;  // error with wich Xsection is calculated
  Double_t   fIntTime;      // integration time in seconds
  Double_t   fPairsInt;     // estimated average number of pairs in IntTime
  Double_t   fMinXSTest;    // min number of generator calls for Xsection estimate
  Double_t   fMaxXSTest;    // max number of generator calls for Xsection estimate

  //
  ClassDef(AliGenQEDBg,1) // Generator e+e- pair background from PbPb QED interactions
};
#endif
Commit	Line	Data
0ebd3869	1	#ifndef ALIGENQEDBG_H
	2	#define ALIGENQEDBG_H
	3	/* Copyright(c) 1998-2002, ALICE Experiment at CERN, All rights reserved. *
	4	* Copyright(c) 1997, 1998, 2002, Adrian Alscher and Kai Hencken *
	5	* Copyright(c) 2002 Kai Hencken, Yuri Kharlov, Serguei Sadovsky *
	6	* See cxx source for full Copyright notice */
	7
	8	/* $Id$ */
	9	// Event generator of single e+e- pair production in ultraperipheral PbPb collisions
	10	// at 5.5 TeV/nucleon.
	11	// Author: Yuri.Kharlov@cern.ch
	12	// 9 October 2002
	13
	14	#include "AliGenMC.h"
	15	#include "AliGenEventHeader.h"
	16	#include "AliGenEpEmv1.h"
	17
	18	//-------------------------------------------------------------
	19	class AliGenQEDBg : public AliGenEpEmv1
	20	{
	21	public:
	22	AliGenQEDBg();
	23
	24	virtual ~AliGenQEDBg();
	25	virtual void Generate();
	26	virtual void Init();
	27	//
	28	Double_t GetLuminosity() const {return fLumi;}
	29	Double_t GetIntegrationTime() const {return fIntTime;}
	30	Double_t GetXSection() const {return fXSection;}
	31	Double_t GetXSectionEps() const {return fXSectionEps;}
	32	Double_t GetMeanNPairs() const {return fPairsInt;}
	33	//
	34	void SetLumiIntTime(double lumi, double intTime);
	35	void SetXSectionEps(double eps=1e-2) {fXSectionEps = eps>0 ? eps:1e-2;}
	36	void SetMinMaxXSTest(double mn,double mx);
	37	//
	38	protected:
	39	AliGenQEDBg(const AliGenQEDBg & gen);
	40	AliGenQEDBg & operator=(const AliGenQEDBg & gen);
	41	//
	42	Double_t fLumi; // beam luminsity
	43	Double_t fXSection; // estimated cross section in k-barns
	44	Double_t fXSectionEps; // error with wich Xsection is calculated
	45	Double_t fIntTime; // integration time in seconds
	46	Double_t fPairsInt; // estimated average number of pairs in IntTime
	47	Double_t fMinXSTest; // min number of generator calls for Xsection estimate
	48	Double_t fMaxXSTest; // max number of generator calls for Xsection estimate
	49
	50	//
	51	ClassDef(AliGenQEDBg,1) // Generator e+e- pair background from PbPb QED interactions
	52	};
	53	#endif