Article (Scientific journals)
Constraining higher-spin S-matrices
Tran, Vuong
2023In Journal of High Energy Physics, 2023 (2)
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Keywords :
Higher Spin Gravity; Higher Spin Symmetry; Scattering Amplitudes; Nuclear and High Energy Physics
Abstract :
[en] There are various no-go theorems that tightly constrain the existence of local higher-spin theories with non-trivial S-matrix in flat space. Due to the existence of higher-spin Yang-Mills theory with non-trivial scattering amplitudes, it makes sense to revisit Weinberg’s soft theorem — a direct consequence of the Lorentz invariance of the S-matrix that does not take advantage of unitarity and parity invariance. By working with the chiral representation — a representation originated from twistor theory, we show that Weinberg’s soft theorem can be evaded and non-trivial higher-spin S-matrix is possible. In particular, we show that Weinberg’s soft theorem is more closely related to the number of derivatives in the interactions rather than spins. We also observe that all constraints imposed by gauge invariance of the S-matrix are accompanied by polynomials in the soft momentum of the emitted particle where the zeroth order in the soft momentum is a charge conservation law.
Research center :
AGIF - Algèbre, Géométrie et Interactions fondamentales
Disciplines :
Physics
Author, co-author :
Tran, Vuong ;  Université de Mons - UMONS > Faculté des Sciences > Service de Physique de l'Univers, Champs et Gravitation
Language :
English
Title :
Constraining higher-spin S-matrices
Publication date :
01 February 2023
Journal title :
Journal of High Energy Physics
ISSN :
1126-6708
eISSN :
1029-8479
Publisher :
Springer Science and Business Media Deutschland GmbH
Volume :
2023
Issue :
2
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S827 - Physique de l'Univers, Champs et Gravitation
Research institute :
R150 - Institut de Recherche sur les Systèmes Complexes
Funders :
ERC - European Research Council
F.R.S.-FNRS - Fonds de la Recherche Scientifique
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