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/particleProperties [ Modules ]

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NAME

module particleProperties

PURPOSE

Defines a database structure that contains the particle properties of all hadrons (baryons and mesons).

particleProperties/hadronProperties [ Types ]

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NAME

type hadronProperties

SOURCE

  type, public :: hadronProperties
     integer, dimension(nDecays) :: decaysID         = 0         ! the channel id
     real, dimension(nDecays)    :: decays           = 0.        ! the branching ratio
     character(len=12)           :: name             = 'Invalid'
     character(len=14)           :: nameTeX          = 'Invalid'
     real                        :: mass             = 0.
     real                        :: width            = 0.
     real                        :: spin             = 0. ! J
     integer                     :: AngularMomentum  = 0  ! Angular Momentum of Nucleon-Pion or Lambda-Kaon final state.
     integer                     :: isoSpinTimes2    = 0  ! I
     integer                     :: strangeness      = 0
     integer                     :: charm            = 0
     integer                     :: rating           = 0
     logical                     :: propagated       = .false.
     logical                     :: usedForXsections = .false.
     integer                     :: stability        = 0
     real                        :: minmass          = 0.
  end type hadronProperties

NOTES

Width of different decay channels for 2 Body Decays in the vacuum at the pole mass: The width are supposed to be the same within an isospin multiplet.

The additional flag 'stability' encodes on a bitwise level, how the particle may decay (cf. also master_1Body):

  • 1: particle may decay during run, if gammaMed > gammaCutOff
  • 2: particle may decay at the end of the run, if gammaMed > 1e-10
  • 4: particle may decay at the end via Jetset, if there the parameters allow for a decay.

The default values are 0 or 3. You can change this in your jobcard via the flag StabilityFlag in the namelist "InitStability".

The decay channel IDs are positive for 2-body decays and negative for 3-body decays. Whether it is a meson decay or a baryon decay has to be decided by the property of the parent particle.

particleProperties/hadron [ Global module-variables ]

[ Top ] [ particleProperties ] [ Global module-variables ]

SOURCE

  type(hadronProperties), dimension(1:pion+nMes-1), save, public :: hadron

PURPOSE

Database of hadron properties.

USAGE

  • To get e.g. the mass of the nucleon type "hadron(nucleon)%mass". The ID's are chosen according to IdTable.

NOTES

  • Since the baryons cover the range 1:61 and the mesons 101:122, there is a 'hole' for 62:100.

particleProperties/propagationSwitch [ Global module-variables ]

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SOURCE

  integer, save :: propagationSwitch = 3

PURPOSE

particleProperties/usageForXsectionSwitch [ Global module-variables ]

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SOURCE

  integer, save :: usageForXsectionSwitch = 2

PURPOSE

particleProperties/rho_dilep [ Global module-variables ]

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SOURCE

  logical, save :: rho_dilep = .false.

PURPOSE

If .false. (default), the rho meson width will be exclusively given by the 2pi decay and its minmass will be 2m_pi. If .true., the dilepton width will be included in the width and spectral function of the rho, and the minmass will be 2m_e. This is important for dilepton spectra, in order to get contributions from the rho below the 2pi threshold.

particleProperties/FileNameDecayChannels [ Global module-variables ]

[ Top ] [ particleProperties ] [ Global module-variables ]

PURPOSE

The absolute filename of the file containing decay channel infos.

possible values:

  • if not set, default is '[path_To_Input]/DecayChannels.dat'
  • if given, but does not contain '/': default is '[path_To_Input]/[FileNameDecayChannels]'
  • otherwise: filename is absolute, including path

NOTE if you want to use the file 'XXX.dat' in the actual directory, give it as './XXX.dat'

SOURCE

  character(300), save :: FileNameDecayChannels = ''

particleProperties/PartName [ Functions ]

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NAME

function PartName(ID,IQ,isAnti) function PartName(ID) function PartName(Part)

PURPOSE

return a String containing name, charge etc. of the particle

INPUTS

  • integer, intent(in) :: ID,IQ -- ID and charge of particle
  • logical, intent(in) :: isAnti -- true if antiparticle, false if particle

or :

USAGE

  • character*() = PartName(ID,IQ,isAnti)
  • character*() = PartName(Part)

NOTES

if only ID is given, the retruned name only contains the particle name, i.e. it is in a short version

particleProperties/TeXName [ Functions ]

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NAME

function TeXName(ID,IQ,isAnti) function TeXName(ID) function TeXName(Part)

PURPOSE

return a String containing name, charge etc. of the particle. Fomramtting according TeX rules

INPUTS

  • integer, intent(in) :: ID,IQ -- ID and charge of particle
  • logical, intent(in) :: isAnti -- true if antiparticle, false if particle

or :

NOTES

if only ID is given, the retruned name only contains the particle name, i.e. it is in a short version

particleProperties/InitParticleProperties [ Subroutines ]

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NAME

subroutine InitParticleProperties

PURPOSE

Define the variables baryon and meson with the Parameter Sets out of Manley and PDG

InitParticleProperties/setParameters [ Subroutines ]

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NAME

subroutine setParameters

PURPOSE

Define the variables baryon and meson. Here all the parameters besides the decay channels are set.

InitParticleProperties/decideOnPropagationUsage [ Subroutines ]

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NAME

subroutine decideOnPropagationUsage

PURPOSE

Decides which baryons shall be explicitly propagated and used for the cross sections.

InitParticleProperties/setThresholds [ Subroutines ]

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NAME

subroutine setThresholds

PURPOSE

Set the thresholds of the decay channels, i.e. the lightest mass at which a resonance can decay into this channel (= sum of the daughter masses).

InitParticleProperties/setDecays [ Subroutines ]

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NAME

subroutine setDecays

PURPOSE

The decay ratios out of Manley & PDG are initialized. The numbering of the decay channels is according to the module decayChannels.

Here only the file "buuinput/DecayChannels.dat" is read in (or, if given explicitely via FileNameDecayChannels, its variant)

InitParticleProperties/updateMinmassesAndThresholds [ Subroutines ]

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NAME

subroutine updateMinmassesAndThresholds

PURPOSE

This routine updates the minmasses of all particles according to their decay channels (important e.g. when using rho_dilep). Then it updates the decay thresholds according to the updated minmasses.

InitParticleProperties/initBaryon [ Functions ]

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NAME

type(baryonProperties) function initBaryon(name,nameTeX,mass,width,spin,rating,isospinTimes2,strangeness,charm,angMom)

PURPOSE

Constructor routine to simplify the initialization of a baryon. Sets also the flag %stability to a default value.

InitParticleProperties/initMeson [ Functions ]

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NAME

type(mesonProperties) function initMeson(name, nameTeX, mass, width, spin, isospinTimes2, strangeness, charm, minmass)

PURPOSE

Constructor routine to simplify the initialization of a meson. Sets also the flag %stability to a default value.

particleProperties/getAngularMomentum_meson [ Functions ]

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NAME

integer function getAngularMomentum_meson(DecayChannel, partID)

PURPOSE

Returns the angular momentum of the outgoing particles of a specific 2-body decay channel of a meson.

INPUTS

  • integer :: DecayChannel -- The number of the 2-body decay channel of the meson according to module decayChannels.
  • integer :: partID -- The ID of the mother resonance

NOTES

The final state parity is given by (p_1)*(p_2)*(-1)^L

baryonWidthVacuum/getAngularMomentum_baryon [ Functions ]

[ Top ] [ baryonWidthVacuum ] [ Functions ]

NAME

integer function getAngularMomentum_baryon(DecayChannel, partID)

PURPOSE

Returns the angular momentum of the outgoing particles of a specific 2-body decay channel of a baryon.

INPUTS

  • integer :: DecayChannel -- The number of the 2-body decay channel of the baryon according to module decayChannels.
  • integer :: partID -- The ID of the mother resonance

particleProperties/PrintParticleProperties [ Subroutines ]

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NAME

subroutine PrintParticleProperties

PURPOSE

Prints all particle properties and decay channels as latex tables.

OUTPUT

written to "GiBUU_database.tex"

particleProperties/GiBUU_database.tex [ Output files ]

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NAME

GiBUU_database.tex

PURPOSE

Lists the properties of the implemented baryons.

particleProperties/PrintBaryonProperties [ Subroutines ]

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NAME

subroutine PrintBaryonProperties

PURPOSE

Prints all baryon properties and decay channels as latex tables.

particleProperties/PrintMesonProperties [ Subroutines ]

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NAME

subroutine PrintMesonProperties

PURPOSE

Prints all meson properties and decay channels as latex tables.

particleProperties/init [ Subroutines ]

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NAME

subroutine init

PURPOSE

Read out job card to initialize module parameters.

particleProperties/initDatabase [ Namelists ]

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NAME

NAMELIST initDatabase

PURPOSE

Includes the switches:

particleProperties/ReadInitModify [ Subroutines ]

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NAME

subroutine ReadInitModify

PURPOSE

Read in namelist "ModifyParticles" to initialize module parameters.

ReadInitModify/mass [ Global module-variables ]

[ Top ] [ ReadInitModify ] [ Global module-variables ]

SOURCE

    real, dimension(1:pion+nMes-1) :: mass = -1.0

PURPOSE

Input array for modifications on the particle mass

NOTES

This array is intended to "input" values for the mass of the particles, which are different from the default. Therefore only entries, which are positive after reading the file are stored in the internal database.

ReadInitModify/width [ Global module-variables ]

[ Top ] [ ReadInitModify ] [ Global module-variables ]

SOURCE

    real, dimension(1:pion+nMes-1) :: width = -1.0

PURPOSE

Input array for modifications on the particle width

NOTES

This array is intended to "input" values for the width of the particles, which are different from the default. Therefore only entries, which are positive after reading the file are stored in the internal database.

ReadInitModify/stabilityFlag [ Global module-variables ]

[ Top ] [ ReadInitModify ] [ Global module-variables ]

SOURCE

    integer, dimension(1:pion+nMes-1) :: stabilityFlag = -1

PURPOSE

Input array for modifications on the particle stability

NOTES

This array is intended to "input" values for the stability of the particles, which are different from the default. Therefore only entries, which are >-1 after reading the file are stored in the internal database.

The index of the array is the particle ID. The value encodes on a bitwise level, how the particle may decay (cf. also master_1Body):

The default values are one of the following:

  • 0: particle may not decay at all (i.e. it is stable)
  • 3: particle may decay both during run and at the end (combination of 1 and 2)

particleProperties/ModifyParticles [ Namelists ]

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NAME

NAMELIST ModifyParticles

PURPOSE

Includes the switches:

particleProperties/isStrange [ Functions ]

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NAME

logical function isStrange(ID)

INPUTS

  • integer :: ID

RESULT

  • .true. if ID corresponds to a strange particle

particleProperties/isCharmed [ Functions ]

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NAME

logical function isCharmed(ID)

INPUTS

  • integer :: ID

RESULT

  • .true. if ID corresponds to a charmed particle

particleProperties/isNonExotic [ Functions ]

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NAME

logical function isNonExotic(ID)

INPUTS

  • integer :: ID

RESULT

  • .true. if ID corresponds to a non-exotic particle

particleProperties/validCharge [ Functions ]

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NAME

logical function validCharge (teilchen)

PURPOSE

This routine returns .true. if the charge is valid for the particle, and .false if not. This is done by checking the z-component of its isospin. 

   Q=I_Z+(B+S+C+B+T)/2.
   => I_Z=Q-(B+S+C+B+T)/2.
   => I_Z=Q-(B+S+C)/2. if no bottom and top quarks are considered

INPUTS

type(particle), intent(in) :: teilchen ! Regarded particle

particleProperties/validCharge_ID [ Functions ]

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NAME

logical function validCharge_ID (ID, Q)

PURPOSE

This routine returns .true. if the charge is valid for the particle, and .false if not. This is done by checking the z-component of its isospin. 

   Q=I_Z+(B+S+C+B+T)/2.
   => I_Z=Q-(B+S+C+B+T)/2.
   => I_Z=Q-(B+S+C)/2. if no bottom and top quarks are considered

NOTES

We assume that Q is the charge of the particle, not the antiparticle.

INPUTS

  • integer, intent(in) :: ID ! ID of Regarded particle
  • integer, intent(in) :: Q ! Charge of Regarded particle