Year: 2024
Type: article
Abstract: We construct a candidate tree-level gravitational Compton amplitude for a rotating Kerr black hole, for any quantum spin s=0,1/2,1,…,∞, from which we extract the corresponding classical amplitude to all orders in the spin vector S^{μ}. We use multiple insights from massive higher-spin quantum field theory, such as massive gauge invariance and improved behavior in the massless limit. A chiral-field approach is particularly helpful in ensuring correct degrees of freedom, and for writing down compact off-shell interactions for general spin. The simplicity of the interactions is echoed in the structure of the spin-s Compton amplitude, for which we use homogeneous symmetric polynomials of the spin variables. Where possible, we compare to the general-relativity results in the literature, available up to eighth order in spin.
Source: Physical Review Letters
Institutions: Uppsala University, Nordic Institute for Theoretical Physics, Stockholm University, KTH Royal Institute of Technology, Royal Institution of Great Britain, ShanghaiTech University, London Institute for Mathematical Sciences, Queen Mary University of London, P.N. Lebedev Physical Institute of the Russian Academy of Sciences, University of Mons
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
OpenAlex ID: W4401639042