Dipole spin polarizabilities and gyrations of spin-1 particles in the Duffin-Kemmer-Petiau formalism

TL;DR

This paper develops a relativistic covariant model for spin-1 particles interacting with electromagnetic fields, incorporating spin polarizabilities and gyrations, and analyzes their effects on Compton scattering amplitudes.

Contribution

It introduces a novel covariant Lagrangian formalism for spin-1 particles that includes spin polarizabilities and gyrations within the Duffin-Kemmer-Petiau framework.

Findings

Spin polarizabilities and gyrations influence Compton scattering amplitudes.

The model respects crossing symmetry, parity, and gauge invariance.

Results align with low-energy theorems for photon energies.

Abstract

In this paper relativistic-invariant phenomenological Lagrangians of interaction between spin-1 particles and electromagnetic field were obtained in the Duffin-Kemmer-Petiau formalism on the basis of the covariant model that takes into account both spin polarizabilities and gyrations of the above-mentioned particles. It was shown that in the suggested covariant model with regard to the crossing symmetry, spatial parity and gauge invariance conservation laws, definite spin polarizabilities and gyrations of spin-1 particles contribute to the expansion of Compton scattering amplitude, starting from the corresponding orders on energy of pfotons that is in the agreement with low-energy theorems for that process.