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arXiv · 2203.07563

Neutron size from high energy scattering data

Michael J. Longo
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Abstract

Alvarado, Aranda, and Bonilla propose a sub-GeV U(1)R gauge boson model to explain the proton charge radius discrepancy. Their model assumes opposite sign U(1)R charge assignments for up and down quarks in the nucleon. I point out that might cause a difference between neutron and proton mass radii that contradicts existing p-p and n-p scattering data. Using existing neutron and proton scattering data I show that the neutron and proton mass radii are equal within about 2%. This constitutes a challenge to models that attempt to explain the discrepancy by modifying the quark couplings.

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Michael J. Longo. 2022-03-15. Neutron size from high energy scattering data. https://arxiv.org/abs/2203.07563

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