class AliGeVSimParticle: public TObject

 Default constructor

  pdg          - Particle type code in PDG standard (see: http://pdg.lbl.gov)
  model        - momentum distribution model (1 - 7)
  multiplicity - multiplicity of particle type
  T            - Inverse slope parameter ("temperature")
  dY           - Raridity Width (only for model 1)
  exp          - expansion velocity (only for model 4)

 pdg - Particle type code in PDG standard (see: http://pdg.lbl.gov)

 Note that multiplicity can be interpreted by GeVSim
 either as Total multiplicity in the acceptance or dN/dY

 Set Model (1-7)
 For details about standard and custom models refer to ALICE NOTE

 Set multiplicity. The value is interpreted either as a total multiplciity
 in the acceptance or as a multiplicity density - dN/dY at midrapidity

 Switch between total multiplicity (kTRUE) and
 multiplciity density (kFALSE)

 If this method is used its overrides mode in AliGenGeVSim

 Set directed flow coefficient to a value independent
 of transverse momentum and rapidity

 Set elliptic flow coefficient to a value independent
 of transverse momentum and rapidity

 Function used by AliGenGeVSim

 Returns true if both Elliptic and Directed flow has a simple model.
 If at least one is parametrised returns false.

 Set parameters for Directed Flow
 Actual flow coefficient is calculated as follows

 V1(Pt,Y) = (V11 + V12*Pt) * sign(Y) * (V13 + V14 * Y^3)

 where sign = 1 for Y > 0 and -1 for Y < 0

 Defaults values
 v12 = v14 = 0
 v13 = 1

 Set parameters for Elliptic Flow
 Actual flow coefficient is calculated as follows

 pTmax is in GeV
 v21 - flow value at saturation


 V2 = v21 * (pT/pTMax ) * exp (-v22 * y^2)    where pT <= pTmax
      v21 * exp (-v22 * y^2)                   where pT > pTmax

 Default values:
 v22 = 0

 The parametrisation is suitable for relativistic particles
 eg. Pions (at RHIC energies)

 Set parameters for Elliptic Flow
 Actual flow coefficient is calculated as follows

 V2 = (V21 + V22 pT^2) * exp (-v22 * y^2)

 The parameterisation is suitable for heavy particles: proton, kaon

 Return coefficient of a directed flow for a given pt and y.
 For coefficient calculation method refer to SetDirectedParam()

 Return coefficient of a elliptic flow for a given pt and y.
 For coefficient calculation method refer to SetEllipticParam()