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Compton amplitude for massive bosons of arbitrary spin

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arxiv 2504.06343 v1 pith:Z4S7N3BR submitted 2025-04-08 hep-th

classification hep-th
keywords spinamplitudecomptonhighertheoryanalogueanalysisanalytic
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

In this work, we write down an analytic expression of electromagnetic tree-level Compton amplitude for a completely symmetric traceless (bosonic) higher spin particle in any dimension. Our analysis is restricted to the three-point function, which is unique in the Infrared and responsible for the Coulomb interactions/soft photon theorem. We propose an analogue of $R_\xi$ gauge in a theory of higher spin particles. We demonstrate that the theory is unitary only for $\xi=1,\infty$.

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  1. Compton amplitude and Contact term(s) in the Spinor Helicity formalism

    hep-th 2025-06 conditional novelty 5.0 of 10

    Reference-vector independence fixes the contact term in the tree-level electromagnetic Compton amplitude for arbitrary-spin massive bosons, yielding a manifestly gauge-invariant spinor-helicity expression without spur...

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