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/spinProjector [ Modules ]

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NAME

module spinProjector

PURPOSE

  • Provides the spin projector for spin 3/2 resonances


spinProjector/spin32proj [ Functions ]

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NAME

function spin32proj(resID,mu,nu,p_res)

PURPOSE

  • provides the spin projector for spin 3/2 resonances as defined e.g. in PRC 73, 065502 (2006), eq. (21)
  • return value is contravariant: spin32proj^(mu nu)

INPUTS

  • real, dimension(0:3),intent(in) :: p_res ! resonance 4-momentum
  • integer :: mu , nu ! Lorentz indices
  • integer :: resID ! ID of the resonance
  • logical, optional :: useInvMass ! if true, use invariant mass in projector, if false, use pole mass (needed for u-channel)

OUTPUT

  • spin32proj is complex with dimension(0:3,0:3)