A BCS–type wave function describes the ground state of the massless Thirring model in the chirally broken phase. The massless Thirring model with fermion fields quantized in the chirally broken phase bosonizes to the quantum field theory of the free massless (pseudo)scalar field (Eur. Phys. J. C 20, 723 (2001)). The wave functions of the ground state of the free massless (pseudo)scalar field ar...

Fock module realization for the unitary singleton representations of the d − 1 dimensional conformal algebra o(d − 1, 2), which correspond to the spaces of single-particle states of massless scalar and spinor in d− 1 dimensions, is given. The pattern of the tensor product of a pair of singletons is analyzed in any dimension. It is shown that for d > 3 the tensor product of two boson singletons ...

Massive spin s ≥ 3/2 fields can become partially massless in cosmo-logical backgrounds. In the plane spanned by m 2 and Λ, there are lines where new gauge invariances permit intermediate sets of higher helicities, rather than the usual flat space extremes of all 2s + 1 massive or just 2 massless helicities. These gauge lines divide the (m 2 , Λ) plane into unitarily allowed or forbidden interme...