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/vertices [ Modules ]

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NAME

module vertices

PURPOSE

Provides vertex functions

vertices/debug [ Global module-variables ]

[ Top ] [ vertices ] [ Global module-variables ]

SOURCE

  logical, parameter      :: debug=.false.

PURPOSE

switch on/off debugging output

vertices/vertex_gammaN_to_spin3_2_negParity [ Functions ]

[ Top ] [ vertices ] [ Functions ]

NAME

function vertex_gammaN_to_spin3_2(q,p,resID,resCharge) result(vertex)

PURPOSE

  • Provides the vertex for gamma N -> spin 3/2 resonance

INPUTS

  • real, dimension(0:3), intent(in) :: q,p -- photon and nucleon momenta
  • integer , intent(in) :: resID -- ID of the resonance
  • integer , intent(in) :: resCharge -- Charge of the resonance

OUTPUT

  • complex,dimension(0:3,0:3,0:3,0:3) :: vertex
  • First two indices =mu,nu, i.e. (Gamma^{mu,nu} )_ij=vertex(mu,nu,i,j)