On unitary implementability of conformal
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E. Angelopoulos; M. Flato
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Article
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1978
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Springer
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English
โ 304 KB
We show that the only projective representations of the conformal group in a Hilbert space which, when restricted to the Poincar~ subgroup, are unitary irreducible of mass zero and discrete helicity, are the usual unitary representations of SU(2, 2) often called ladder representations. Some physical