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Fundamental constants from photon-photon scattering in three-beam collisions

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arxiv 2406.10342 v2 pith:4XQE66R4 submitted 2024-06-14 hep-ph physics.opticsphysics.plasm-ph

Alexander J. Macleod , Ben King This is my paper · ORCID
classification hep-phphysics.opticsphysics.plasm-ph
keywords scatteringphotonbeamscollisionconstantselasticfundamentallaser
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Direct measurement of the elastic scattering of real photons on an electromagnetic field would allow the fundamental low-energy constants of quantum electrodynamics (QED) to be experimentally determined. We show that scenarios involving the collision of three laser beams have several advantages over conventional two-beam scenarios. The kinematics of a three-beam collision allows for a higher signal-to-noise ratio in the detection region, without the need for polarimetry and separates out contributions from different orders of photon scattering. A planar configuration of colliding a photon beam from an x-ray free electron laser with two optical beams is studied in detail. We show that measurements of elastic photon scattering and vacuum birefringence are possible with currently available technology.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Back-reflection in dipole fields and beyond

    quant-ph 2025-10 conditional novelty 6.0 of 10

    Back-reflection in dipole fields is dominated by a four-wave-mixing channel; an optimized three-pulse planar setup gives ~1.5 discernible signal photons per shot with signal-to-background ~10^5.

  2. Coherent enhancement of QED cross-sections in electromagnetic backgrounds

    hep-ph 2024-12 conditional novelty 5.0 of 10

    This paper shows that replacing a photon with a classical laser field can coherently boost QED cross-sections and improve their energy scaling, for example sigma_1->1 ~ (omega/m)^4 versus sigma_2->2 ~ (omega/m)^6.

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