Centre de Physique Théorique


Vendredi 7 juillet 2017

14h00 – 15h00, Amphi 5 du CPT

Mixed-symmetry fields in de Sitter : a group-theoretical glance

Nicolas Boulanger (Univ. de Mons Belgique)

The characters of all unitary irreducible representations of the (d+1)-dimensional de Sitter spacetime isometry algebra so(1, d+1) are derived, leading to a dictionary between those representations and massive or (partially) massless fields on de Sitter spacetime of arbitrary dimension. We propose a way of taking the flat limit of representations in (anti-) de Sitter spaces in terms of these characters, and conjecture the spectrum resulting from taking the flat limit of mixed-symmetry fields in de Sitter spacetime. The equivalent of the scalar singleton for the de Sitter (dS) spacetime is presented.