Continuous-spin field propagator and interaction with matter
Abstract
Action principles for the single and double valued continuous-spin representations of the Poincaré group have been recently proposed in a Segal-like formulation. We address three related issues: first, we explain how to obtain these actions directly from the Fronsdal-like and Fang-Fronsdal-like equations by solving the traceless constraints in Fourier space. Second, we introduce a current, similar to the one of Berends, Burgers and Van Dam, which is bilinear in a pair of scalar matter fields, to which the bosonic continuous-spin field can couple minimally. Third, we investigate the current exchange mediated by a continuous-spin particle obtained from this action principle and investigate whether it propagates the right degrees of freedom, and whether it reproduces the known result for massless higher-spin fields in the helicity limit.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- November 2017
- DOI:
- 10.1007/JHEP11(2017)113
- arXiv:
- arXiv:1710.05788
- Bibcode:
- 2017JHEP...11..113B
- Keywords:
-
- Higher Spin Symmetry;
- Space-Time Symmetries;
- Gauge Symmetry;
- High Energy Physics - Theory
- E-Print:
- 31 pages, no figure