Higher-spin particles at high-energy colliders
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Beyond Standard ModelEffective Field TheoriesHigher Spin Symmetry
Criado, J.C... [et al.]. Higher-spin particles at high-energy colliders. J. High Energ. Phys. 2021, 254 (2021). [https://doi.org/10.1007/JHEP05(2021)254]
SponsorshipEstonian Research Council MOBTTP135 PRG803 MOBTT5 MOBJD323 MOBTT86; EU through the European Regional Development Fund CoE program TK133 "The Dark Side of the Universe"; UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC) ST/P001246/1; Junta de Andalucia
Using an effective field theory approach for higher-spin fields, we derive the interactions of colour singlet and electrically neutral particles with a spin higher than unity, concentrating on the spin-3/2, spin-2, spin-5/2 and spin-3 cases. We compute the decay rates and production cross sections in the main channels for spin-3/2 and spin-2 states at both electron-positron and hadron colliders, and identify the most promising novel experimental signatures for discovering such particles at the LHC. The discussion is qualitatively extended to the spin-5/2 and spin-3 cases. Higher-spin particles exhibit a rich phenomenology and have signatures that often resemble the ones of supersymmetric and extra-dimensional theories. To enable further studies of higher-spin particles at collider and beyond, we collect the relevant Feynman rules and other technical details.