On the Theory of Continuous-Spin Particles: Wavefunctions and Soft-Factor Scattering Amplitudes
arXiv:1302.1198 · doi:10.1007/JHEP09(2013)104
Abstract
The most general massless particles allowed by Poincare-invariance are "continuous-spin" particles (CSPs) characterized by a scale ρ, which at ρ=0 reduce to familiar helicity particles. Though known long-range forces are adequately modeled using helicity particles, it is not known whether CSPs can also mediate long-range forces or what consequences such forces might have. We present sharp evidence for consistent interactions of CSPs with matter: new CSP equations of motion, wavefunctions, and covariant radiation amplitudes. In a companion paper, we use these results to resolve old puzzles concerning CSP thermodynamics and exhibit a striking correspondence limit where CSP amplitudes approach helicity-0, 1 or 2 amplitudes.
37 pages, 5 figure. version published in JHEP. References added, redundant covariant basis of states added. Fixed some typos and inconsistent sign conventions in earlier version
References in corpus (4)
Cited by in corpus (33)
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