Line data    Source code

       1             : #ifndef ALISLOWNUCLEONMODELEXP_H
       2             : #define ALISLOWNUCLEONMODELEXP_H
       3             : /* Copyright(c) 198-1999, ALICE Experiment at CERN, All rights reserved. *
       4             :  * See cxx source for full Copyright notice                               */
       5             : 
       6             : /* $Id$ */
       7             : 
       8             : //
       9             : // Experimental data inspired Gray Particle Model for p-Pb collisions
      10             : // Fluctuations are calculated from a binomial distribution.
      11             : // Author: A.Morsch
      12             : //
      13             : 
      14             : #include "AliSlowNucleonModel.h"
      15             : 
      16             : class AliCollisionGeometry;
      17             : 
      18           0 : class AliSlowNucleonModelExp : public AliSlowNucleonModel
      19             : {
      20             :  public:
      21             :     AliSlowNucleonModelExp();
      22           0 :     virtual ~AliSlowNucleonModelExp(){;}
      23             :     virtual void GetNumberOfSlowNucleons(AliCollisionGeometry* geo,
      24             :                                          Int_t& ngp, Int_t& ngn, Int_t& nbp, Int_t& nbn) const;
      25             :     virtual void GetNumberOfSlowNucleons2(AliCollisionGeometry* geo,
      26             :                                          Int_t& ngp, Int_t& ngn, Int_t& nbp, Int_t& nbn) const;
      27             :     virtual void GetNumberOfSlowNucleons2s(AliCollisionGeometry* geo,
      28             :                                          Int_t& ngp, Int_t& ngn, Int_t& nbp, Int_t& nbn) const;
      29             :     // 1st model
      30             :     virtual void SetParameters(Float_t alpha1, Float_t alpha2);
      31           0 :     virtual void SetSaturation(Bool_t saturation) {fApplySaturation = saturation;}
      32             :     virtual void SetSaturationParams(Int_t ngray=15, Int_t nblack=28) 
      33           0 :                 {fnGraySaturation=ngray; fnBlackSaturation=nblack;}
      34             :     // 2nd model
      35           0 :     virtual void SetLCPparam(Float_t al) {fLCPparam=al;}
      36             :     virtual void SetNslowParams(Float_t a, Float_t b, Float_t c) 
      37           0 :                 {fSlownparam[0]=a; fSlownparam[1]=b; fSlownparam[2]=c;}
      38             :     
      39             :  protected:
      40             :     Float_t  fP;          // Number of protons  in the target 
      41             :     Float_t  fN;          // Number of neutrons in the target
      42             :     Float_t  fAlphaGray;  // Proportionality between gray   particles and number of collisions
      43             :     Float_t  fAlphaBlack; // Proportionality between black  particles and number of collisions
      44             :     Bool_t   fApplySaturation;  // If true apply satoration to N_black vs. N_gray
      45             :     Int_t    fnGraySaturation;  // N_gray value for N_black saturation
      46             :     Int_t    fnBlackSaturation; // N_black saturation value
      47             :     //
      48             :     // Adding parameters for 2nd model that can be tuned during config
      49             :     Float_t  fLCPparam;         // parameter to calculate LCP from <Nslow p>
      50             :     Float_t  fSlownparam[3];    // parameters to calculate <Nslow n> from LCP
      51             :     //
      52             :     // Adding parameter to smear the number of slow nucleons
      53             :     Float_t  fSigmaSmear;
      54             :     
      55             :     
      56           6 :   ClassDef(AliSlowNucleonModelExp, 4) // Gray Particle Model (Experiment inspired)
      57             : };
      58             : #endif
      59             : 
      60             : 
      61             : 
      62             : 
      63             : 
      64             : 
      65             :