Hydjet  2.4
A Monte-Carlo model of jet quenching in ultrarelativistic heavy ion collisions
Public Attributes | List of all members
InitialParamsHydjet_t Struct Reference

Structure of input parameters. More...

#include <InitialParams.h>

Public Attributes

Int_t fNevnt
 number of events
 
Int_t femb
 embedding flag
 
Double_t fSqrtS
 cms energy per nucleon
 
Double_t fAw
 atomic number of colliding nuclei
 
Int_t fIfb
 flag of type of centrality generation More...
 
Double_t fBmin
 minimum impact parameter in units of nuclear radius RA
 
Double_t fBmax
 maximum impact parameter in units of nuclear radius RA
 
Double_t fBfix
 fix impact parameter in units of nuclear radius RA
 
Int_t fSeed
 parameter to set the random nuber seed More...
 
Double_t fT
 chemical freeze-out temperature in GeV
 
Double_t fMuB
 baryon potential
 
Double_t fMuS
 strangeness potential
 
Double_t fMuC
 charm potential
 
Double_t fMuI3
 isospin potential
 
Double_t fThFO
 thermal freeze-out temperature T^th in GeV
 
Double_t fMu_th_pip
 effective chemical potential of positivly charged pions at thermal in GeV
 
Double_t fTau
 proper time value
 
Double_t fSigmaTau
 its standart deviation (emission duration)
 
Double_t fR
 maximal transverse radius
 
Double_t fYlmax
 maximal longitudinal rapidity
 
Double_t fUmax
 maximal transverse velocity multiplaed on gamma_r
 
Double_t frhou2
 parameter to swich ON/OFF(0) rhou2
 
Double_t frhou3
 parameter to swich ON/OFF(0) rhou3
 
Double_t frhou4
 parameter to swich ON/OFF(0) rhou4
 
Double_t fDelta
 momentum asymmetry parameter
 
Double_t fEpsilon
 coordinate asymmetry parameter
 
Double_t fv2
 parameter to swich ON/OFF(0) epsilon2 fluctuations
 
Double_t fv3
 parameter to swich ON/OFF(0) epsilon3 fluctuations
 
Int_t fIfDeltaEpsilon
 flag to specify fDelta and fEpsilon values(=0 user's ones, >=1 parametrized)
 
Int_t fDecay
 flag to switch on/off hadron decays (=0 decays off, >=1 decays on), (default: 1)
 
Double_t fWeakDecay
 flag to switch on/off weak hadron decays <0: decays off, >0: decays on, (default: 0)
 
Int_t fPythDecay
 Flag to choose how to decay resonances in high-pt part, fPythDecay: 0 by PYTHIA decayer, 1 by FASTMC decayer(mstj(21)=0)
 
Int_t fEtaType
 flag to choose rapidity distribution More...
 
Int_t fTMuType
 flag to use calculated chemical freeze-out temperature, baryon potential and strangeness potential as a function of fSqrtS
 
Double_t fCorrS
 flag and value to include strangeness supression factor
 
Int_t fCharmProd
 flag to include statistical charm production
 
Double_t fCorrC
 flag and value to include charmness supression factor
 
Int_t fNhsel
 flag to switch on/off jet and hydro-state production More...
 
Int_t fPyhist
 Suppress PYTHIA particle history (=1 only final state particles from hard part; =0 include full particle history)
 
Int_t fIshad
 flag to switch on/off impact parameter dependent nuclear shadowing for gluons and light sea quarks (u,d,s) More...
 
Double_t fPtmin
 minimal transverse momentum transfer p_T of hard parton-parton scatterings in GeV (the PYTHIA parameter ckin(3)=fPtmin)
 
Double_t fT0
 initial temperature (in GeV) of QGP for central Pb+Pb collisions at mid-rapidity More...
 
Double_t fTau0
 proper QGP formation time in fm/c (0.01<fTau0<10)
 
Int_t fNf
 number of active quark flavours N_f in QGP fNf=0, 1,2 or 3
 
Int_t fIenglu
 flag to fix type of in-medium partonic energy loss More...
 
Int_t fIanglu
 flag to fix type of angular distribution of in-medium emitted gluons More...
 
Char_t partDat [256] = ""
 path to the particle data file
 
Char_t tabDecay [256] = ""
 path to the particle decay table
 
Bool_t fPythiaTune = false
 Flag to use castom PYTHIA tune.
 
Char_t pythiaTune [256] = ""
 path to the Pythia tune file
 
Bool_t doPrintInfo = true
 Flag to turn ON/OFF additional info.
 
Bool_t allowEmptyEvent = false
 Allow or not empty events.
 

Detailed Description

Structure of input parameters.

Member Data Documentation

◆ fEtaType

Int_t InitialParamsHydjet_t::fEtaType

flag to choose rapidity distribution

if fEtaType<=0, then uniform rapidity distribution in [-fYlmax,fYlmax] if fEtaType>0, then Gaussian with dispertion = fYlmax

◆ fIanglu

Int_t InitialParamsHydjet_t::fIanglu

flag to fix type of angular distribution of in-medium emitted gluons

0: small-angular, 1: wide-angular, 2:collinear (default: 0).

◆ fIenglu

Int_t InitialParamsHydjet_t::fIenglu

flag to fix type of in-medium partonic energy loss

0: radiative and collisional loss, 1: radiative loss only, 2: collisional loss only (default: 0);

◆ fIfb

Int_t InitialParamsHydjet_t::fIfb

flag of type of centrality generation

=0 is fixed by fBfix, not 0 impact parameter is generated in each event between fBfmin and fBmax according with Glauber model (f-la 30)

◆ fIshad

Int_t InitialParamsHydjet_t::fIshad

flag to switch on/off impact parameter dependent nuclear shadowing for gluons and light sea quarks (u,d,s)

0: shadowing off, 1: shadowing on for fAw=207, 197, 110, 40, default: 1

◆ fNhsel

Int_t InitialParamsHydjet_t::fNhsel

flag to switch on/off jet and hydro-state production

0: jet production off and hydro on, 1: jet production on and jet quenching off and hydro on, 2: jet production on and jet quenching on and hydro on, 3: jet production on and jet quenching off and hydro off, 4: jet production on and jet quenching on and hydro off

◆ fSeed

Int_t InitialParamsHydjet_t::fSeed

parameter to set the random nuber seed

=0 the current time is used to set the random generator seed, !=0 the value fSeed is used to set the random generator seed and then the state of random number generator in PYTHIA MRPY(1)=fSeed

◆ fT0

Double_t InitialParamsHydjet_t::fT0

initial temperature (in GeV) of QGP for central Pb+Pb collisions at mid-rapidity

initial temperature for other centralities and atomic numbers will be calculated automatically (allowed range is 0.2<fT0<2)