Citation

BibTex format

@article{Adamo:2018:10.1007/JHEP07(2018)016,
author = {Adamo, T and Nakach, S and Tseytlin, AA},
doi = {10.1007/JHEP07(2018)016},
journal = {Journal of High Energy Physics},
title = {Scattering of conformal higher spin fields},
url = {http://dx.doi.org/10.1007/JHEP07(2018)016},
volume = {2018},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We develop a formalism for describing the most general notion of tree-level scattering amplitudes in 4d conformal higher spin theory. As conformal higher spin fields obey higher-derivative equations of motion, there are many distinct on-shell external states which may contribute to their scattering, some of which grow polynomially with time, leading to ill-defined amplitudes. We characterize the set of admissible scattering states which produce finite tree amplitudes, noting that there are more such states than just standard massless higher spins obeying two-derivative equations of motion. We use conformal gravity as a prime example, where the set of scattering states includes the usual Einstein graviton and a ‘ghost’ massless spin 1 particle. An extension of the usual spinor helicity formalism allows us to encode these scattering states efficiently in terms of ‘twistor-spinors’. This leads to compact momentum space expressions for all finite tree-level 3-point amplitudes of conformal higher spin theory. While some of these 3-point amplitudes vanish (including all those with only standard two-derivative higher spin external states), there are many others which are non-vanishing. We also comment on the generalization to scattering of conformal higher spins in AdS4.
AU  - Adamo,T
AU  - Nakach,S
AU  - Tseytlin,AA
DO  - 10.1007/JHEP07(2018)016
PY  - 2018///
SN  - 1029-8479
TI  - Scattering of conformal higher spin fields
T2  - Journal of High Energy Physics
UR  - http://dx.doi.org/10.1007/JHEP07(2018)016
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000438135600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
VL  - 2018
ER  -
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