Dilepton photoproduction on a deuteron target

Abstract

We investigate the sensitivity of the cross section for lepton pair production off a deuteron target, $\gamma d\to l^{+}{l}^{-}d$, to the deuteron charge radius. We show that for small momentum transfers the Bethe-Heitler process dominates, and that it is sensitive to the charge radius such that a cross section ratio measurement of about $0.1\%$ relative accuracy could give a deuteron charge radius more accurate that the current electron scattering value and sufficiently accurate to distinguish between the electronic and muonic atomic values.

arXiv comment4 pages, 5 figures

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Cited by in corpus (2)

• The proton charge radius
• Searching Dark Photons using displaced vertices at Belle II -- with backgrounds