GiBUU documentation

Table of Contents Sourcefiles Index Functions Global module-variables Modules Namelists Output files Program Subroutines Types

TABLE OF CONTENTS

• 1. /initHadron
• 1.1. initHadron/impactParameter
• 1.2. initHadron/bRaiseFlag
• 1.3. initHadron/deltaB
• 1.4. initHadron/nRunsPerB
• 1.5. initHadron/perturbative
• 1.6. initHadron/numberParticles
• 1.7. initHadron/particleId
• 1.8. initHadron/antiParticle
• 1.9. initHadron/particleCharge
• 1.10. initHadron/ekin_lab
• 1.11. initHadron/E_bind
• 1.12. initHadron/iniType
• 1.13. initHadron/zChoice
• 1.14. initHadron/delta
• 1.15. initHadron/deltaZ
• 1.16. initHadron/width
• 1.17. initHadron/debug
• 1.18. initHadron/initHadronInduced
• 1.18.1. initHadronInduced/initInput
• 1.18.2. initHadronInduced/setKinematics
• 1.18.3. initHadronInduced/setPosition
• 1.18.4. initHadronInduced/setGeometry
• 1.19. initHadron/hadron

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/initHadron [ Modules ]

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NAME

module initHadron

PURPOSE

Initialises a hadron for the hadron-nucleus collision.

NOTES

The target nucleus has to be initialised separately (by using initNucPhaseSpace routine) before calling the initHadronInduced routine.

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initHadron/impactParameter [ Global module-variables ]

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SOURCE

  real, save :: impactParameter=0.

PURPOSE

smaller 0: Impact parameter will be chosen randomly in the interval [0;abs(impactParameter)] (see subroutine setGeometry). It is recommended to take very large negative value of impactParameter in order to have good automatic random choice, e.g. impactParameter=-100.

---

initHadron/bRaiseFlag [ Global module-variables ]

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SOURCE

  logical, save :: bRaiseFlag=.false.

PURPOSE

if .true.: actual impact parameter will be raised by deltaB after nRunsPerB subsequent runs. Starting value is given by the impactParameter variable.

---

initHadron/deltaB [ Global module-variables ]

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SOURCE

  real, save :: deltaB=0.

PURPOSE

impact parameter step (relevant if bRaiseFlag=.true.)

---

initHadron/nRunsPerB [ Global module-variables ]

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SOURCE

  integer, save :: nRunsPerB=1         

PURPOSE

number of subsequent runs per impact parameter (relevant if bRaiseFlag=.true.)

---

initHadron/perturbative [ Global module-variables ]

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SOURCE

  logical, save :: perturbative=.false. 

PURPOSE

if .true. then the hadron is a perturbative particle

---

initHadron/numberParticles [ Global module-variables ]

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SOURCE

  integer,save   :: numberParticles = 200

PURPOSE

Number of projectile testparticles per ensemble in the case of a perturbative treatment

---

initHadron/particleId [ Global module-variables ]

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SOURCE

  integer, save :: particleId=1         

PURPOSE

Identity of a hadron

---

initHadron/antiParticle [ Global module-variables ]

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SOURCE

  logical, save :: antiParticle=.false. 

PURPOSE

if .true. then the hadron is an antiparticle

---

initHadron/particleCharge [ Global module-variables ]

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SOURCE

  integer, save :: particleCharge=0  

PURPOSE

Charge of the hadron

---

initHadron/ekin_lab [ Global module-variables ]

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SOURCE

  real,    save :: ekin_lab=1.  

PURPOSE

kinetic energy of the hadron in the rest frame of the target nucleus (GeV)

NOTES

If ekin_lab < 0. --- initialization according to the binding energy

---

initHadron/E_bind [ Global module-variables ]

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SOURCE

  real,    save :: E_bind=0.  

PURPOSE

binding energy of initialized hadron (GeV)

NOTES

Active for iniType= 0,2 if ekin_lab < 0. is set.

---

initHadron/iniType [ Global module-variables ]

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SOURCE

  integer, save :: iniType=0

PURPOSE

• 0: usual initialization for the hadron-nucleus collision
• 1: position and momentum of the hadron is chosen according to the Gaussians centered, resp., at the centre of the nucleus and at zero momentum (impactParameter, distance and ekin_lab have no effect in this case)
• 2: gaussian in coordinate space, but usual sharp momentum choice (impactParameter, distance and ekin_lab work as usual)

---

initHadron/zChoice [ Global module-variables ]

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SOURCE

  integer, save :: zChoice=1

PURPOSE

• 1: hadron is initialised at fixed distance delta from nuclear surface
• 2: hadron is initialised at fixed z

Relevant for iniType=0 or iniType=2.

---

initHadron/delta [ Global module-variables ]

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SOURCE

  real, save :: delta=0.5

PURPOSE

• for zChoice=1: distance from nuclear surface, at which the hadron is initialised [fm]
• for zChoice=2: maximum distance from the edge of nucleus in transverse direction which restricts the choice of actual impact parameter for impactParameter < 0 (for impactParameter > 0 no restriction)

Relevant for iniType=0 or iniType=2.

---

initHadron/deltaZ [ Global module-variables ]

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SOURCE

  real, save :: deltaZ=5.

PURPOSE

z = -deltaZ - R_nucleus, where z is z-coordinate of the hadron Relevant for iniType=0,2 and zChoice=2.

---

initHadron/width [ Global module-variables ]

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SOURCE

  real, save ::    width=1.

PURPOSE

Width of a gaussian density profile [fm]. Only relevant for iniType= 1 and 2.

---

initHadron/debug [ Global module-variables ]

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SOURCE

  logical, save :: debug=.false.

PURPOSE

if .true. then additional printouts are done for debugging

---

initHadron/initHadronInduced [ Subroutines ]

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NAME

subroutine initHadronInduced (teilchenReal, teilchenPert)

PURPOSE

Provides initial conditions for a hadron.

INPUTS

• type(particle),dimension(:,:),intent(inout) :: teilchenReal --- array of real particles to store the hadron if it is real
• type(particle),dimension(:,:),intent(inout) :: teilchenPert --- array of perturbative particles to store the hadron if it is perturbative

NOTES

• The user has to provide the namelist 'hadron', which contains the impact parameter, lab. energy, id, charge and antiparticle- parameters of the hadron. If the input impact parameter is negative, then the actual impact parameter is chosen by Monte-Carlo between 0 and abs(input impact parameter).
• The target nucleus has to be initialised before calling this routine.
• The program initialises the real (not perturbative) particle.

---

initHadronInduced/initInput [ Subroutines ]

[ Top ] [ initHadronInduced ] [ Subroutines ]

NAME

subroutine initInput

PURPOSE

Reads input out of jobcard. Namelist 'hadron'.

---

initHadron/hadron [ Namelists ]

[ Top ] [ initHadron ] [ Namelists ]

NAME

NAMELIST hadron

PURPOSE

Includes parameters for initialization of a hadron in the case of the hadron-nucleus collision:

• impactParameter
• bRaiseFlag
• deltaB
• nRunsPerB
• perturbative
• numberParticles
• particleId
• antiParticle
• particleCharge
• ekin_lab
• E_bind
• iniType
• zChoice
• delta
• deltaZ
• width
• debug

---

initHadronInduced/setKinematics [ Subroutines ]

[ Top ] [ initHadronInduced ] [ Subroutines ]

NAME

subroutine setKinematics

PURPOSE

Sets basic kinematics of a hadron colliding with a nucleus.

---

initHadronInduced/setPosition [ Subroutines ]

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NAME

subroutine setPosition

PURPOSE

Sets position of the hadron.

NOTES

In the case of usual initialisation (initype=0), the actual impact parameter b and the coordinate z has to be defined before by calling the subroutine setGeometry.

---

initHadronInduced/setGeometry [ Subroutines ]

[ Top ] [ initHadronInduced ] [ Subroutines ]

NAME

subroutine setGeometry (flagPrint)

PURPOSE

Sets the impact parameter b and coordinate z of the hadron.

INPUTS

• logical, intent(in) :: flagPrint -- if .true., then print output parameters to standard output file

NOTES

If the input impactParameter is less than zero, than the actual impact parameter is choosen by a Monte-Carlo-decision.

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