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/FF_Delta_production [ Modules ]

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NAME

module FF_Delta_production

PURPOSE

Provides the electro-weak form factors for the process lepton nucleon -> lepton' Delta.


FF_Delta_production/FF_Delta [ Global module-variables ]

[ Top ] [ FF_Delta_production ] [ Global module-variables ]

SOURCE

  integer, save :: FF_Delta=1   ! 0: FF taken from MAID 
                                ! (see notes of Luis Alvarez-Ruso)
                                ! 1: FF taken from Paschos 
                                ! (hep-ph/0501109 v2)

PURPOSE

This switch decides whether the Paschos form factors (FF_Delta=1) or the Maid form factors (FF_Delta=0) are used. Default is FF_Delta=1.


FF_Delta_production/input_FF_Delta [ Namelists ]

[ Top ] [ FF_Delta_production ] [ Namelists ]

NAME

NAMELIST /input_FF_Delta

PURPOSE

Includes the input switch:


FF_Delta_production/readInputDeltaFormFactors [ Subroutines ]

[ Top ] [ FF_Delta_production ] [ Subroutines ]

NAME

subroutine readInputDeltaFormFactors

PURPOSE

decide, which set of form factors is used by reading in FF_Delta.


FF_Delta_production/formfactors_Delta [ Subroutines ]

[ Top ] [ FF_Delta_production ] [ Subroutines ]

NAME

subroutine formfactors_Delta(Qs,W,processID,c3v,c4v,c5v,c6v,c3a,c4a,c5a,c6a)

PURPOSE

  • Provides the electro-weak form factors for the process lepton nucleon -> lepton' Delta.

INPUTS

  • real, intent(in) :: Qs ! =Q^2 : virtuality of gauge boson in units of GeV**2 = (-1)*Mandelstam-t
  • real, intent(in) :: W ! invariant mass
  • integer, intent(in) :: processID

"processID" specifies the reaction type: EM, CC, NC

OUTPUT

  • real, intent(out) ::c3v,c4v,c5v,c6v ! Vector Form factors
  • real, intent(out),optional :: c3a,c4a,c5a,c6a ! Axial Form factors (not necessary as input if processID=EM)