Photon and Axion Splitting in an Inhomogeneous Magnetic Field - High Energy Physics - TheoryReportar como inadecuado

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Abstract: The axion photon system in an external magnetic field, when the direction ofpropagation of axions and photons is orthogonal to the direction of theexternal magnetic field, displays a continuous axion-photon duality symmetry inthe limit the axion mass is neglected. The conservation law that follow in thiseffective 2+1 dimensional theory from this symmetry is obtained. The magneticfield interaction is seen to be equivalent to first order to the interaction ofa complex charged field with an external electric potential, where thisficticious -electric potential- is proportional to the external magnetic field.This allows one to solve for the scattering amplitudes using already knownscalar QED results. From the scalar QED analog the axion and the photon aresymmetric and antisymmetric combinations of particle and antiparticle. If oneconsiders therefore scattering experiments in which the two spatial dimensionsof the effective theory are involved non trivially, one observes that bothparticle and antiparticle components of photons and axions are preferentiallyscattered in different directions, thus producing the splitting ordecomposition of the photon and axion into their particle and antiparticlecomponents in an inhomogeneous magnetic field. This observable in principleeffect is of first order in the axion photon coupling, unlike the -lightshining through a wall phenomena -, which is second order.

Autor: E.I. Guendelman


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