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The Proton Charge Radius from Dimuon Photoproduction off the Proton

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arxiv 2407.20375 v2 pith:2KQYAFSJ submitted 2024-07-29 hep-ph hep-exnucl-exnucl-th

The Proton Charge Radius from Dimuon Photoproduction off the Proton

classification hep-ph hep-exnucl-exnucl-th
keywords protonchargedimuonphotoproductionradiusregionallowsalternative
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We investigate the feasibility of measuring the proton charge radius through dimuon photoproduction off a proton target. Our findings indicate that the Bethe-Heitler mechanism, which dominates at small momentum transfers, allows for an extraction of the proton electromagnetic form factors in the extremely low $Q^2$ region below $10^{-3}$ GeV$^2$ in the spacelike region, when the incident photon beam energy exceeds several hundred MeV. The optimal kinematical region and a sensitivity study of the proton charge radius from dimuon photoproduction are presented. Such a measurement is expected to provide an alternative to the elastic muon-proton scattering measurements such as MUSE at PSI and AMBER at CERN.

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Cited by 1 Pith paper

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

  1. Implications of exclusive photon leptoproduction measurements for the proton charge-radius puzzle

    hep-ph 2026-07 conditional novelty 5.0

    After excluding or cutting low-|t| CLAS 2018 data, BH-dominated EP measurements yield a proton charge radius smaller than the PDG average and consistent with PRad and muonic hydrogen.