[u/mrichter/AliRoot.git] / FASTSIM / AliFastGlauber.h

#ifndef ALIFASTGLAUBER_H
#define ALIFASTGLAUBER_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$ */

// Utility class to make simple Glauber type calculations for collision geometries:
// Impact parameter, production points, reaction plane dependence
// Author: Andreas Morsch
// andreas.morsch@cern.ch

#include <TObject.h>
#include <TString.h>
class TF1;
class TF2;


class AliFastGlauber : public TObject {
 public:
    static AliFastGlauber* Instance();
    virtual ~AliFastGlauber();
    void Init(Int_t mode = 0);

    void SetWoodSaxonParameters(Double_t r0, Double_t d, Double_t w, Double_t n)
	{fWSr0 = r0; fWSd = d; fWSw = w; fWSn = n;}
    void SetWoodSaxonParametersAu()
	{fWSr0 = 6.38; fWSd = 0.535; fWSw = 0.; fWSn = 8.59e-4;}
    void SetWoodSaxonParametersPb()
	{fWSr0 = 6.78; fWSd = 0.54; fWSw = 0.; fWSn = 7.14e-4;}
    void SetMaxImpact(Float_t bmax = 20.) {fgBMax = bmax;};
    void SetHardCrossSection(Float_t xs = 1.0) {fSigmaHard = xs;}
    void SetNNCrossSection  (Float_t xs = 55.6) {fSigmaNN = xs;}
    void SetNucleus(Int_t n=208) {fA=n;}
    void SetAuAuRhic();
    void SetPbPbLHC();
    void SetFileName(TString &fn){fName=fn;}
    void SetFileName(const char *fn="$(ALICE_ROOT)/FASTSIM/data/glauberPbPb.root"){fName=fn;}

    const TF1* GetWSB()            const {return fgWSb;}
    const TF2* GetWSbz()           const {return fgWSbz;}
    const TF1* GetWSz()            const {return fgWSz;} 
    const TF1* GetWSta()           const {return fgWSta;}
    const TF2* Kernel()            const {return fgWStarfi;}
    const TF2* GetWStarfi()        const {return fgWStarfi;}
    const TF2* GetWKParticipants() const {return fgWKParticipants;}
    const TF1* GetWParticipants()  const {return fgWParticipants;} 
    const TF1* Overlap()           const {return fgWStaa;}
    const TF1* GetWStaa()          const {return fgWStaa;} 
    const TF2* GetWAlmond()        const {return fgWAlmond;}
    const TF1* GetWPathLength0()   const {return fgWPathLength0;} 
    const TF1* GetWPathLength()    const {return fgWPathLength;}
    const TF1* GetWIntRadius()     const {return fgWIntRadius;}
    const TF1* GetWSgeo()          const {return fgWSgeo;}
    const TF1* GetWSbinary()       const {return fgWSbinary;}
    const TF1* GetWSN()            const {return fgWSN;}     
    const TF1* GetWEnergyDensity() const {return fgWEnergyDensity;} 
    const TF2* GetWAlmondFixedB(Int_t i) const {return fgWAlmondFixedB[i];}
    
    Float_t GetWr0() const {return fWSr0;}
    Float_t GetWSd() const {return fWSd;}
    Float_t GetWSw() const {return fWSw;}
    Float_t GetWSn() const {return fWSn;}
    Float_t GetSigmaHard()       const {return fSigmaHard;}
    Float_t GetSigmaNN()         const {return fSigmaNN;}
    Int_t GetA()                 const {return fA;}
    const TString* GetFileName() const {return &fName;}
    Float_t GetBmin() const {return fBmin;}
    Float_t GetBmax() const {return fBmax;}

    void DrawWSb()          const;
    void DrawThickness()    const;
    void DrawOverlap()      const;
    void DrawParticipants() const;
    void DrawGeo()          const;
    void DrawBinary()       const;
    void DrawN()            const;    
    void DrawKernel(Double_t b = 0.) const;
    void DrawAlmond(Double_t b = 0.) const;
    void DrawPathLength0(Double_t b = 0., Int_t iopt = 0)            const;
    void DrawPathLength(Double_t b, Int_t ni = 1000, Int_t iopt = 0) const;
    void DrawIntRadius(Double_t b = 0.) const;
    void DrawEnergyDensity()            const;
    
    Double_t CrossSection(Double_t b1, Double_t b2)               const;
    Double_t HardCrossSection(Double_t b1, Double_t b2)           const;
    Double_t NHard(Double_t b1, Double_t b2)                      const;
    Double_t FractionOfHardCrossSection(Double_t b1, Double_t b2) const;
    Double_t Binaries(Double_t b)                 const;
    Double_t GetNumberOfBinaries(Double_t b)      const;
    Double_t Participants(Double_t b)             const;
    Double_t GetNumberOfParticipants(Double_t  b) const;
    Double_t GetNumberOfCollisions(Double_t  b)   const;
    Double_t GetNumberOfCollisionsPerEvent(Double_t  b) const;
    Double_t MeanOverlap(Double_t b1, Double_t b2);
    Double_t MeanNumberOfCollisionsPerEvent(Double_t b1, Double_t b2);
    void SimulateTrigger(Int_t n);
    void GetRandom(Float_t& b, Float_t& p, Float_t& mult);
    void GetRandom(Int_t& bin, Bool_t& hard);
    Double_t GetRandomImpactParameter(Double_t bmin, Double_t bmax);

    void StoreFunctions() const;
    void StoreAlmonds()   const;

    void SetLengthDefinition(Int_t def=1) {fEllDef=def;}
    Int_t GetLengthDef() const {return fEllDef;}
    void SetCentralityClass(Double_t xsecFrLow=0.0,Double_t xsecFrUp=0.1);    
    void GetRandomBHard(Double_t& b);
    void GetRandomXY(Double_t& x,Double_t& y);
    void GetSavedXY(Double_t xy[2]) {xy[0] = fXY[0]; xy[1] = fXY[1];}
    void GetSavedI0I1(Double_t i0i1[2]) {i0i1[0] = fI0I1[0]; i0i1[1] = fI0I1[1];}
    void SaveXY(Double_t x, Double_t y) {fXY[0] = x; fXY[1] = y;}
    void SaveI0I1(Double_t i0, Double_t i1) {fI0I1[0] = i0; fI0I1[1] = i1;}

    void GetRandomPhi(Double_t& phi);
    Double_t CalculateLength(Double_t b=0.,Double_t x0=0.,Double_t y0=0.,
                             Double_t phi0=0.);
    void GetLengthAndPhi(Double_t& ell,Double_t &phi,Double_t b=-1.);
    void GetLength(Double_t& ell,Double_t b=-1.);
    void GetLengthsBackToBackAndPhi(Double_t& ell1,Double_t& ell2,
				    Double_t &phi,
				    Double_t b=-1.);
    void GetLengthsBackToBack(Double_t& ell1,Double_t& ell2,
			      Double_t b=-1.);
    void GetLengthsForPythia(Int_t n,Double_t* phi,Double_t* ell,
			     Double_t b=-1.);
    void PlotBDistr(Int_t n=1000);
    void PlotLengthDistr(Int_t n=1000,Bool_t save=kFALSE,
			 const char *fname="length.root");
    void PlotLengthB2BDistr(Int_t n=1000,Bool_t save=kFALSE,
			    const char *fname="lengthB2B.root");
    void CalculateI0I1(Double_t& integral0,Double_t& integral1,
		       Double_t b=0.,
		       Double_t x0=0.,Double_t y0=0.,Double_t phi0=0.,
		       Double_t ellCut=20.) const;
    void GetI0I1AndPhi(Double_t& integral0,Double_t& integral1,Double_t &phi,
		 Double_t ellCut=20.,Double_t b=-1.);
    void GetI0I1(Double_t& integral0,Double_t& integral1,
		 Double_t ellCut=20.,Double_t b=-1.);
    void GetI0I1BackToBackAndPhi(Double_t& integral01,Double_t& integral11,
				 Double_t& integral02,Double_t& integral12,
				 Double_t& phi,
				 Double_t ellCut=20.,Double_t b=-1.);
    void GetI0I1BackToBackAndPhiAndXY(Double_t& integral01,Double_t& integral11,
				      Double_t& integral02,Double_t& integral12,
				      Double_t& phi,Double_t& x,Double_t&y,
				      Double_t ellCut=20.,Double_t b=-1.);
    void GetI0I1BackToBack(Double_t& integral01,Double_t& integral11,
			   Double_t& integral02,Double_t& integral12,
			   Double_t ellCut=20.,Double_t b=-1.);
    void GetI0I1ForPythia(Int_t n,Double_t* phi,
			  Double_t* integral0,Double_t* integral1,
			  Double_t ellCut=20.,Double_t b=-1.);
    void GetI0I1ForPythiaAndXY(Int_t n,Double_t* phi,
			       Double_t* integral0,Double_t* integral1,
			       Double_t&x, Double_t &y,
			       Double_t ellCut=20.,Double_t b=-1.);
    void PlotI0I1Distr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE,
		       const char *fname="i0i1.root");
    void PlotI0I1B2BDistr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE,
			  const char *fname="i0i1B2B.root");
    void PlotAlmonds() const;
    // Copy
    AliFastGlauber& operator=(const AliFastGlauber & rhs);
    void Copy(TObject&) const;
 protected:
    static Double_t WSb            (Double_t *xx, Double_t *par);
    static Double_t WSbz           (Double_t *xx, Double_t *par);
    static Double_t WSz            (Double_t *xx, Double_t *par);
    static Double_t WSta           (Double_t *xx, Double_t *par);
    static Double_t WStarfi        (Double_t *xx, Double_t *par);
    static Double_t WStaa          (Double_t *xx, Double_t *par);
    static Double_t WKParticipants (Double_t *xx, Double_t *par);
    static Double_t WParticipants  (Double_t *xx, Double_t *par);    
    static Double_t WSgeo          (Double_t *xx, Double_t *par);
    static Double_t WSbinary       (Double_t *xx, Double_t *par);
    static Double_t WSN            (Double_t *xx, Double_t *par);
    static Double_t WAlmond        (Double_t *xx, Double_t *par);
    static Double_t WPathLength0   (Double_t *xx, Double_t *par);
    static Double_t WPathLength    (Double_t *xx, Double_t *par);
    static Double_t WIntRadius     (Double_t *xx, Double_t *par);
    static Double_t WEnergyDensity (Double_t *xx, Double_t *par);

    void Reset() const;
 private:
    AliFastGlauber();
    AliFastGlauber(const AliFastGlauber& glauber);

    static Float_t         fgBMax;       // Maximum Impact Parameter
    static const Int_t     fgkMCInts;    // Number of MC integrations
    static AliFastGlauber* fgGlauber;    // Singleton instance
     
    
    static TF1*    fgWSb;            // Wood-Saxon Function (b)
    static TF2*    fgWSbz;           // Wood-Saxon Function (b, z)
    static TF1*    fgWSz;            // Wood-Saxon Function (b = b0, z)
    static TF1*    fgWSta;           // Thickness Function
    static TF2*    fgWStarfi;        // Kernel for Overlap Function
    static TF2*    fgWKParticipants; // Kernel for number of participants
    static TF1*    fgWParticipants;  // Number of participants
    static TF1*    fgWStaa;          // Overlap Function
    static TF2*    fgWAlmond;        // Interaction Almond
    static TF1*    fgWPathLength0;   // Path Length as a function of phi
    static TF1*    fgWPathLength;    // Path Length as a function of phi
    static TF1*    fgWIntRadius;     // Interaction Radius
    static TF1*    fgWSgeo;          // dSigma/db geometric
    static TF1*    fgWSbinary;       // dSigma/db binary
    static TF1*    fgWSN;            // dN/db binary
    static TF1*    fgWEnergyDensity; // Energy density as a function of impact parameter
    static TF2*    fgWAlmondFixedB[40]; // Interaction Almonds read from file
    static TF2*    fgWAlmondCurrent;    // Interaction Almond used for length
    
    Float_t fWSr0;      // Wood-Saxon Parameter r0
    Float_t fWSd;       // Wood-Saxon Parameter d
    Float_t fWSw;       // Wood-Saxon Parameter w
    Float_t fWSn;       // Wood-Saxon Parameter n
                        // (chosen such that integral is one)
    Float_t fSigmaHard; // Hard Cross Section [mbarn]
    Float_t fSigmaNN;   // NN Cross Section [mbarn]   
    Int_t fA;           // Nucleon number of nucleus A

    Float_t fBmin;      // Minimum b (set through centrality selection)
    Float_t fBmax;      // Coresponding maximum b
    Double_t fXY[2];    // Current generated production point
    Double_t fI0I1[2];  // Current integrals I0 and I1
    Int_t fEllDef;      // definition of length (see CalculateLength())
    TString fName;      // filename of stored distributions
    ClassDef(AliFastGlauber,2) // Event geometry simulation in the Glauber Model
};

#endif
Commit	Line	Data
5b3a5a5d	1	#ifndef ALIFASTGLAUBER_H
	2	#define ALIFASTGLAUBER_H
	3	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
	6	/* $Id$ */
a42548b0	7
041f7f97	8	// Utility class to make simple Glauber type calculations for collision geometries:
041f7f97	9	// Impact parameter, production points, reaction plane dependence
a42548b0	10	// Author: Andreas Morsch
a42548b0	11	// andreas.morsch@cern.ch
5b3a5a5d	12
5b3a5a5d	13	#include <TObject.h>
65aa45f2	14	#include <TString.h>
5b3a5a5d	15	class TF1;
a42548b0	16	class TF2;
a42548b0	17
5b3a5a5d	18
	19	class AliFastGlauber : public TObject {
	20	public:
18b7a4a1	21	static AliFastGlauber* Instance();
65aa45f2	22	virtual ~AliFastGlauber();
	23	void Init(Int_t mode = 0);
	24
5b3a5a5d	25	void SetWoodSaxonParameters(Double_t r0, Double_t d, Double_t w, Double_t n)
5b3a5a5d	26	{fWSr0 = r0; fWSd = d; fWSw = w; fWSn = n;}
65aa45f2	27	void SetWoodSaxonParametersAu()
	28	{fWSr0 = 6.38; fWSd = 0.535; fWSw = 0.; fWSn = 8.59e-4;}
	29	void SetWoodSaxonParametersPb()
a42548b0	30	{fWSr0 = 6.78; fWSd = 0.54; fWSw = 0.; fWSn = 7.14e-4;}
041f7f97	31	void SetMaxImpact(Float_t bmax = 20.) {fgBMax = bmax;};
65aa45f2	32	void SetHardCrossSection(Float_t xs = 1.0) {fSigmaHard = xs;}
	33	void SetNNCrossSection (Float_t xs = 55.6) {fSigmaNN = xs;}
	34	void SetNucleus(Int_t n=208) {fA=n;}
	35	void SetAuAuRhic();
	36	void SetPbPbLHC();
	37	void SetFileName(TString &fn){fName=fn;}
d3d4a92f	38	void SetFileName(const char *fn="$(ALICE_ROOT)/FASTSIM/data/glauberPbPb.root"){fName=fn;}
a2f2f511	39
65aa45f2	40	const TF1* GetWSB() const {return fgWSb;}
	41	const TF2* GetWSbz() const {return fgWSbz;}
	42	const TF1* GetWSz() const {return fgWSz;}
	43	const TF1* GetWSta() const {return fgWSta;}
710a8d90	44	const TF2* Kernel() const {return fgWStarfi;}
65aa45f2	45	const TF2* GetWStarfi() const {return fgWStarfi;}
	46	const TF2* GetWKParticipants() const {return fgWKParticipants;}
	47	const TF1* GetWParticipants() const {return fgWParticipants;}
710a8d90	48	const TF1* Overlap() const {return fgWStaa;}
65aa45f2	49	const TF1* GetWStaa() const {return fgWStaa;}
	50	const TF2* GetWAlmond() const {return fgWAlmond;}
	51	const TF1* GetWPathLength0() const {return fgWPathLength0;}
	52	const TF1* GetWPathLength() const {return fgWPathLength;}
	53	const TF1* GetWIntRadius() const {return fgWIntRadius;}
	54	const TF1* GetWSgeo() const {return fgWSgeo;}
	55	const TF1* GetWSbinary() const {return fgWSbinary;}
	56	const TF1* GetWSN() const {return fgWSN;}
	57	const TF1* GetWEnergyDensity() const {return fgWEnergyDensity;}
7f2f270b	58	const TF2* GetWAlmondFixedB(Int_t i) const {return fgWAlmondFixedB[i];}
f3a04204	59
710a8d90	60	Float_t GetWr0() const {return fWSr0;}
	61	Float_t GetWSd() const {return fWSd;}
	62	Float_t GetWSw() const {return fWSw;}
	63	Float_t GetWSn() const {return fWSn;}
	64	Float_t GetSigmaHard() const {return fSigmaHard;}
	65	Float_t GetSigmaNN() const {return fSigmaNN;}
	66	Int_t GetA() const {return fA;}
710a8d90	67	const TString* GetFileName() const {return &fName;}
	68	Float_t GetBmin() const {return fBmin;}
	69	Float_t GetBmax() const {return fBmax;}
	70
	71	void DrawWSb() const;
	72	void DrawThickness() const;
	73	void DrawOverlap() const;
	74	void DrawParticipants() const;
	75	void DrawGeo() const;
	76	void DrawBinary() const;
	77	void DrawN() const;
	78	void DrawKernel(Double_t b = 0.) const;
	79	void DrawAlmond(Double_t b = 0.) const;
	80	void DrawPathLength0(Double_t b = 0., Int_t iopt = 0) const;
	81	void DrawPathLength(Double_t b, Int_t ni = 1000, Int_t iopt = 0) const;
	82	void DrawIntRadius(Double_t b = 0.) const;
	83	void DrawEnergyDensity() const;
f3a04204	84
710a8d90	85	Double_t CrossSection(Double_t b1, Double_t b2) const;
710a8d90	86	Double_t HardCrossSection(Double_t b1, Double_t b2) const;
f762082f	87	Double_t NHard(Double_t b1, Double_t b2) const;
710a8d90	88	Double_t FractionOfHardCrossSection(Double_t b1, Double_t b2) const;
	89	Double_t Binaries(Double_t b) const;
	90	Double_t GetNumberOfBinaries(Double_t b) const;
	91	Double_t Participants(Double_t b) const;
	92	Double_t GetNumberOfParticipants(Double_t b) const;
	93	Double_t GetNumberOfCollisions(Double_t b) const;
148c5ce5	94	Double_t GetNumberOfCollisionsPerEvent(Double_t b) const;
a42548b0	95	Double_t MeanOverlap(Double_t b1, Double_t b2);
a42548b0	96	Double_t MeanNumberOfCollisionsPerEvent(Double_t b1, Double_t b2);
5b3a5a5d	97	void SimulateTrigger(Int_t n);
5b3a5a5d	98	void GetRandom(Float_t& b, Float_t& p, Float_t& mult);
c2140715	99	void GetRandom(Int_t& bin, Bool_t& hard);
65aa45f2	100	Double_t GetRandomImpactParameter(Double_t bmin, Double_t bmax);
65aa45f2	101
710a8d90	102	void StoreFunctions() const;
	103	void StoreAlmonds() const;
	104
65aa45f2	105	void SetLengthDefinition(Int_t def=1) {fEllDef=def;}
e9663638	106	Int_t GetLengthDef() const {return fEllDef;}
65aa45f2	107	void SetCentralityClass(Double_t xsecFrLow=0.0,Double_t xsecFrUp=0.1);
a2f2f511	108	void GetRandomBHard(Double_t& b);
a2f2f511	109	void GetRandomXY(Double_t& x,Double_t& y);
462421a4	110	void GetSavedXY(Double_t xy[2]) {xy[0] = fXY[0]; xy[1] = fXY[1];}
	111	void GetSavedI0I1(Double_t i0i1[2]) {i0i1[0] = fI0I1[0]; i0i1[1] = fI0I1[1];}
	112	void SaveXY(Double_t x, Double_t y) {fXY[0] = x; fXY[1] = y;}
	113	void SaveI0I1(Double_t i0, Double_t i1) {fI0I1[0] = i0; fI0I1[1] = i1;}
	114
a2f2f511	115	void GetRandomPhi(Double_t& phi);
a2f2f511	116	Double_t CalculateLength(Double_t b=0.,Double_t x0=0.,Double_t y0=0.,
710a8d90	117	Double_t phi0=0.);
83f67d08	118	void GetLengthAndPhi(Double_t& ell,Double_t &phi,Double_t b=-1.);
a2f2f511	119	void GetLength(Double_t& ell,Double_t b=-1.);
83f67d08	120	void GetLengthsBackToBackAndPhi(Double_t& ell1,Double_t& ell2,
	121	Double_t &phi,
	122	Double_t b=-1.);
	123	void GetLengthsBackToBack(Double_t& ell1,Double_t& ell2,
	124	Double_t b=-1.);
a2f2f511	125	void GetLengthsForPythia(Int_t n,Double_t* phi,Double_t* ell,
	126	Double_t b=-1.);
	127	void PlotBDistr(Int_t n=1000);
	128	void PlotLengthDistr(Int_t n=1000,Bool_t save=kFALSE,
d3d4a92f	129	const char *fname="length.root");
a2f2f511	130	void PlotLengthB2BDistr(Int_t n=1000,Bool_t save=kFALSE,
d3d4a92f	131	const char *fname="lengthB2B.root");
65aa45f2	132	void CalculateI0I1(Double_t& integral0,Double_t& integral1,
	133	Double_t b=0.,
	134	Double_t x0=0.,Double_t y0=0.,Double_t phi0=0.,
710a8d90	135	Double_t ellCut=20.) const;
83f67d08	136	void GetI0I1AndPhi(Double_t& integral0,Double_t& integral1,Double_t &phi,
83f67d08	137	Double_t ellCut=20.,Double_t b=-1.);
65aa45f2	138	void GetI0I1(Double_t& integral0,Double_t& integral1,
65aa45f2	139	Double_t ellCut=20.,Double_t b=-1.);
83f67d08	140	void GetI0I1BackToBackAndPhi(Double_t& integral01,Double_t& integral11,
	141	Double_t& integral02,Double_t& integral12,
	142	Double_t& phi,
	143	Double_t ellCut=20.,Double_t b=-1.);
c54404bf	144	void GetI0I1BackToBackAndPhiAndXY(Double_t& integral01,Double_t& integral11,
	145	Double_t& integral02,Double_t& integral12,
	146	Double_t& phi,Double_t& x,Double_t&y,
	147	Double_t ellCut=20.,Double_t b=-1.);
65aa45f2	148	void GetI0I1BackToBack(Double_t& integral01,Double_t& integral11,
	149	Double_t& integral02,Double_t& integral12,
	150	Double_t ellCut=20.,Double_t b=-1.);
	151	void GetI0I1ForPythia(Int_t n,Double_t* phi,
	152	Double_t* integral0,Double_t* integral1,
	153	Double_t ellCut=20.,Double_t b=-1.);
2e3b5c95	154	void GetI0I1ForPythiaAndXY(Int_t n,Double_t* phi,
	155	Double_t* integral0,Double_t* integral1,
	156	Double_t&x, Double_t &y,
	157	Double_t ellCut=20.,Double_t b=-1.);
65aa45f2	158	void PlotI0I1Distr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE,
d3d4a92f	159	const char *fname="i0i1.root");
65aa45f2	160	void PlotI0I1B2BDistr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE,
d3d4a92f	161	const char *fname="i0i1B2B.root");
710a8d90	162	void PlotAlmonds() const;
a42548b0	163	// Copy
	164	AliFastGlauber& operator=(const AliFastGlauber & rhs);
	165	void Copy(TObject&) const;
5b3a5a5d	166	protected:
fac5662b	167	static Double_t WSb (Double_t xx, Double_t par);
	168	static Double_t WSbz (Double_t xx, Double_t par);
	169	static Double_t WSz (Double_t xx, Double_t par);
	170	static Double_t WSta (Double_t xx, Double_t par);
	171	static Double_t WStarfi (Double_t xx, Double_t par);
	172	static Double_t WStaa (Double_t xx, Double_t par);
	173	static Double_t WKParticipants (Double_t xx, Double_t par);
	174	static Double_t WParticipants (Double_t xx, Double_t par);
	175	static Double_t WSgeo (Double_t xx, Double_t par);
	176	static Double_t WSbinary (Double_t xx, Double_t par);
	177	static Double_t WSN (Double_t xx, Double_t par);
	178	static Double_t WAlmond (Double_t xx, Double_t par);
	179	static Double_t WPathLength0 (Double_t xx, Double_t par);
	180	static Double_t WPathLength (Double_t xx, Double_t par);
	181	static Double_t WIntRadius (Double_t xx, Double_t par);
	182	static Double_t WEnergyDensity (Double_t xx, Double_t par);
	183
a42548b0	184	void Reset() const;
18b7a4a1	185	private:
	186	AliFastGlauber();
	187	AliFastGlauber(const AliFastGlauber& glauber);
65aa45f2	188
18b7a4a1	189	static Float_t fgBMax; // Maximum Impact Parameter
	190	static const Int_t fgkMCInts; // Number of MC integrations
	191	static AliFastGlauber* fgGlauber; // Singleton instance
	192
	193
041f7f97	194	static TF1* fgWSb; // Wood-Saxon Function (b)
	195	static TF2* fgWSbz; // Wood-Saxon Function (b, z)
	196	static TF1* fgWSz; // Wood-Saxon Function (b = b0, z)
	197	static TF1* fgWSta; // Thickness Function
	198	static TF2* fgWStarfi; // Kernel for Overlap Function
1bc228f5	199	static TF2* fgWKParticipants; // Kernel for number of participants
1bc228f5	200	static TF1* fgWParticipants; // Number of participants
041f7f97	201	static TF1* fgWStaa; // Overlap Function
	202	static TF2* fgWAlmond; // Interaction Almond
	203	static TF1* fgWPathLength0; // Path Length as a function of phi
	204	static TF1* fgWPathLength; // Path Length as a function of phi
	205	static TF1* fgWIntRadius; // Interaction Radius
	206	static TF1* fgWSgeo; // dSigma/db geometric
	207	static TF1* fgWSbinary; // dSigma/db binary
	208	static TF1* fgWSN; // dN/db binary
	209	static TF1* fgWEnergyDensity; // Energy density as a function of impact parameter
7f2f270b	210	static TF2* fgWAlmondFixedB[40]; // Interaction Almonds read from file
65aa45f2	211	static TF2* fgWAlmondCurrent; // Interaction Almond used for length
5b3a5a5d	212
65aa45f2	213	Float_t fWSr0; // Wood-Saxon Parameter r0
	214	Float_t fWSd; // Wood-Saxon Parameter d
	215	Float_t fWSw; // Wood-Saxon Parameter w
	216	Float_t fWSn; // Wood-Saxon Parameter n
	217	// (chosen such that integral is one)
	218	Float_t fSigmaHard; // Hard Cross Section [mbarn]
	219	Float_t fSigmaNN; // NN Cross Section [mbarn]
	220	Int_t fA; // Nucleon number of nucleus A
a2f2f511	221
710a8d90	222	Float_t fBmin; // Minimum b (set through centrality selection)
710a8d90	223	Float_t fBmax; // Coresponding maximum b
462421a4	224	Double_t fXY[2]; // Current generated production point
462421a4	225	Double_t fI0I1[2]; // Current integrals I0 and I1
65aa45f2	226	Int_t fEllDef; // definition of length (see CalculateLength())
5373d3f7	227	TString fName; // filename of stored distributions
7f2f270b	228	ClassDef(AliFastGlauber,2) // Event geometry simulation in the Glauber Model
5b3a5a5d	229	};
	230
	231	#endif