Helicity and infinite spin representations of the Poincare group in 6D

Abstract

The massless irreducible representations of the Poincaré group in the six-dimensional Minkowski space are investigated. We found convenient forms of the Casimir operators and analyzed their spectra. According to this analysis, we conclude that the helicity representation is defined by two (half-)integer numbers, while the infinite spin representation is determined by the real parameter µ 2 and one (half-)integer number.