Continuous-spin particles, on shell

Continuous-spin particles, on shell

Abstract We study on-shell scattering amplitudes for continuous-spin particles (CSPs). Poincaré invariance, little-group ISO(2) covariance, analyticity, and on-shell factorisation (unitarity) impose stringent conditions on these amplitudes. We solve them by realizing a non-trivial representation for...

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Bibliographic Details
Main Authors:	Brando Bellazzini, Stefano De Angelis, Marcello Romano
Format:	Article
Language:	English
Published:	SpringerOpen 2025-05-01
Series:	Journal of High Energy Physics
Subjects:	Scattering Amplitudes Effective Field Theories Space-Time Symmetries
Online Access:	https://doi.org/10.1007/JHEP05(2025)166
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