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The U(1) EM 3 gauge transformation in our eJBD model is modified, and the correct gauge transformation is Aµ→Aµ−∂µ(g−1 χ Λ), ψ →eiΛ′ ψ, g χ =ge−γχχ/MP, (4) ∂µΛ′ =∂µΛ +γχ ∂µχ MP Λ

Fundamental issues related to electromagnetic gauge invariance We need to clarify what the conformal factor e−γgχ/MP in the lagrangian (2) implies since electromagnetic interaction

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Observational tests for a class of scalar-tensor gravity

astro-ph.CO · 2025-05-13 · conditional · novelty 5.0

Null results from the MICROSCOPE fifth-force experiment bound the Yukawa conformal coupling in a proposed scalar-tensor gravity to either less than about 3e-6 or greater than about 0.0026, assuming the model's dark-energy relation.

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  • Observational tests for a class of scalar-tensor gravity astro-ph.CO · 2025-05-13 · conditional · none · ref 2

    Null results from the MICROSCOPE fifth-force experiment bound the Yukawa conformal coupling in a proposed scalar-tensor gravity to either less than about 3e-6 or greater than about 0.0026, assuming the model's dark-energy relation.