Wed·Jul 31, 2024Wednesday·July 31, 2024

1. 01*

   The Proton Charge Radius from Dimuon Photoproduction off the Proton

   Yong-Hui Lin🇩🇪 · Feng-Kun Guo🇨🇳 · Ulf-G. Meißner🇩🇪

   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.

   ↳ hep-phhep-exnucl-exnucl-thPLB(2024)·2 citations

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