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//-*-C++-*-
//-*-CrossSection.h-*-
// Written by James Monk and Andrew Pilkington
/////////////////////////////////////////////////////////////////////////////
#ifndef CROSSSECTION_HH
#define CROSSSECTION_HH
#include <cmath>
#include <complex>
#include <cstdlib>
#include <iostream>
#include <map>
#include <string>
#include <utility>
#include <vector>
//#include "CLHEP/config/CLHEP.h"
#include "CLHEP/Vector/LorentzVector.h"
#include "CLHEP/Vector/ThreeVector.h"
#include "GeneratorInterface/ExhumeInterface/interface/I.h"
//#include "GeneratorInterface/ExhumeInterface/interface/PythiaRecord.h"
#include "GeneratorInterface/ExhumeInterface/interface/Particle.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
//#include "CLHEP/HepMC/include/PythiaWrapper6_2.h"
//#include "CLHEP/HepMC/ConvertHEPEVT.h"
//#include "CLHEP/HepMC/CBhepevt.h"
namespace CLHEP {
class HepRandomEngine;
}
/////////////////////////////////////////////////////////////////////////////
namespace Exhume {
typedef std::pair<double, double> fEntry;
typedef std::pair<const char *, char *> PCharPair;
typedef std::pair<const char *, const void *> PConstVoidPair;
class CrossSection {
public:
CrossSection(const edm::ParameterSet &);
virtual ~CrossSection();
virtual void MaximiseSubParameters() = 0;
virtual void SetPartons() = 0;
virtual void SetSubParameters() = 0;
virtual double SubParameterRange() = 0;
virtual double SubParameterWeight() = 0;
double AlphaS(const double &);
inline void SetRandomEngine(CLHEP::HepRandomEngine *engine) { randomEngine = engine; }
inline double GetRg(const double &x_, const double &Qt) { return (Rg_(x_, Qt)); };
//.....
inline double Differential() {
if (x1 > 1.0 || x2 > 1.0) {
return (0.0);
}
//return( SubProcess() );
//Factor of 2/sqrt(sHat) because we integrate dM not dln(M^2)
return (2.0 * InvSqrtsHat * Lumi() * SubProcess() * exp(B * (t1 + t2)));
};
//.....
inline double GetB() { return (B); };
inline double GetRoot_s() { return (root_s); };
inline std::map<double, double> Getfg2Map() { return (fg2Map); };
inline CLHEP::HepLorentzVector GetProton1() { return (Proton1); };
inline CLHEP::HepLorentzVector GetProton2() { return (Proton2); };
inline std::vector<Particle> GetPartons() { return (Partons); };
inline double Getx1() { return (x1); };
inline double Getx2() { return (x2); };
inline double Gett1() { return (t1); };
inline double Gett2() { return (t2); };
inline double GetsHat() { return (sHat); };
inline double GetSqrtsHat() { return (SqrtsHat); };
inline double GetEta() { return (y); };
inline double GetPhi1() { return (Phi1); };
inline double GetPhi2() { return (Phi2); };
void Hadronise();
void SetKinematics(const double &, const double &, const double &, const double &, const double &, const double &);
inline std::string GetName() { return (Name); };
private:
void AlphaSInit();
double Fg1Fg2(const double &, const double &, const double &);
double Fg1Fg2(const int &, const double &, const double &);
inline double Fg_Qt2(const double &Qt2_, const double &x_, const double &xp_) {
double grad = 5.0 * (Txg(1.1 * Qt2_, x_) - Txg(0.9 * Qt2_, x_)) / Qt2_;
//protect from Qt2 == 0
if (grad != grad) {
return (0.0);
}
return (grad);
};
template <typename T_>
inline void insert(const std::string _name_, const T_ _x_) {
PMap.insert(std::pair<std::string, PConstVoidPair>(_name_, PConstVoidPair(typeid(_x_).name(), _x_)));
}
virtual double SubProcess() = 0;
void LumiInit();
double Lumi();
double Lumi_();
void NoMem();
void ReadCard(const std::string &);
double Splitting(const double &);
double T(const double &);
double TFast(const double &);
bool TBegin, TInterpolate;
std::map<double, std::map<double, double> > TMap2d;
std::map<double, std::map<double, double> >::iterator TMjuHigh, TMjuLow;
double Txg(const double &, const double &);
double Rg1Rg2(const double &);
double Rg_(const double &, double);
std::map<double, std::map<double, double> > RgMap2d;
std::map<double, std::map<double, double> >::iterator RgHigh[2], RgLow[2];
bool RgInterpolate[2], RgBegin;
double B, Freeze, LambdaQCD, Rg, Survive;
double PDF;
double ASFreeze, ASConst;
//.............................
//Used for Lumi function:
double MinQt2, MidQt2, InvMidQt2, InvMidQt4, InvMaxQt2, LumSimpsIncr;
unsigned int LumAccuracy, LumNStart;
int LumNSimps, LumNSimps_1;
double *LumSimpsFunc, *_Qt2, *_Qt, *_KtLow, *_KtHigh, *_AlphaS, *_CfAs_2PIRg, *_NcAs_2PI;
double LumConst;
double Inv2PI, Nc_2PI, Cf_2PIRg;
std::map<std::string, PConstVoidPair> PMap;
std::map<const char *, char *> TypeMap;
std::map<double, double> fg2Map;
//...............................
//Used for T:
double TConst;
int Tn, Tn_1;
double *TFunc;
//...............................
//Used for Splitting:
double Inv3;
int Proton1Id, Proton2Id;
protected:
std::string Name;
std::complex<double> F0(const double &);
std::complex<double> f(const double &);
std::complex<double> Fsf(const double &);
//PPhi is azimuthal angle between protons.
//InvSqrtsHat = 1/sHat
//Others are obvious.
double x1, x1p, x2, x2p, t1, t2, sHat, SqrtsHat, sHat2, InvsHat, InvsHat2, InvSqrtsHat, y, PPhi, Phi1, Phi2, Mju2,
Mju, LnMju2, Pt1, Pt2, Pt1DotPt2, x1x2, ey;
double AlphaEw, gw, HiggsVev, LambdaW;
double BottomMass, CharmMass, StrangeMass, TopMass;
double MuonMass, TauMass;
double HiggsMass, WMass, ZMass;
int FNAL_or_LHC;
double root_s, s, Invs;
CLHEP::HepLorentzVector CentralVector;
CLHEP::HepLorentzVector Proton1, Proton2, P1In, P2In;
/*
struct Particle {
CLHEP::HepLorentzVector p;
int id;
};
*/
std::vector<Particle> Partons;
double Invsx1x2, InvV1MinusV2;
double Gev2fb;
std::string lhapdfSetPath_;
CLHEP::HepRandomEngine *randomEngine;
};
} // namespace Exhume
#endif
////////////////////////////////////////////////////////////////////////////
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