Continuous spin representations from group contraction

@article{Khan2005ContinuousSR,
  title={Continuous spin representations from group contraction},
  author={Abu M. Khan and Pierre Ramond},
  journal={Journal of Mathematical Physics},
  year={2005},
  volume={46},
  pages={053515}
}
We consider how the continuous spin representation (CSR) of the Poincare group in four dimensions can be generated by dimensional reduction. The analysis uses the front-form little group in five dimensions, which must yield the Euclidean group E(2), the little group of the CSR. We consider two cases, one is the single spin massless representation of the Poincare group in five dimensions, the other is the infinite component Majorana equation, which describes an infinite tower of massive states… Expand
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