Low energy doubly-virtual Compton scattering from di-lepton electroproduction on a nucleon

Abstract

We propose a new way to experimentally determine the subleading low-energy structure constant of doubly-virtual Compton scattering on a proton. Such empirical determination will reduce the theoretical model error in estimates of the hadronic correction to the muonic hydrogen Lamb shift. We demonstrate that the di-lepton forward-backward asymmetry in the $e^{-}p\to e^{-}p{e}^{-}{e}^{+}$ process, which can be accessed at electron scattering facilities, yields a large sensitivity to this so far unknown low-energy constant.

References in corpus (24)

• CODATA Recommended Values of the Fundamental Physical Constants: 2014
• High-precision determination of the electric and magnetic form factors of the proton
• Muonic hydrogen and the proton radius puzzle
• The electric and magnetic form factors of the proton
• Electromagnetic excitation of the Delta(1232)-resonance
• Search for a new gauge boson in the $A^{\prime }$ Experiment (APEX)
• The Proton Radius Puzzle
• New measurement of the $1S-3S$ transition frequency of hydrogen: contribution to the proton charge radius puzzle
• Search for light massive gauge bosons as an explanation of the $(g-2{)}_{\mu }$ anomaly at MAMI
• Search for Light Gauge Bosons of the Dark Sector at the Mainz Microtron
• Theory of the 2S-2P Lamb shift and 2S hyperfine splitting in muonic hydrogen
• Higher order proton structure corrections to the Lamb shift in muonic hydrogen
• Proton polarisability contribution to the Lamb shift in muonic hydrogen at fourth order in chiral perturbation theory
• Structure analysis of the virtual Compton scattering amplitude at low energies
• Chiral perturbation theory of muonic hydrogen Lamb shift: polarizability contribution
• Higher Order Polarizabilities of the Proton
• Theoretical framework to analyze searches for hidden light gauge bosons in electron scattering fixed target experiments
• The proton radius: From a puzzle to precision
• Two-photon exchange correction to muon-proton elastic scattering at low momentum transfer
• Dispersion Theory in Electromagnetic Interactions
• Evaluation of the forward Compton scattering off protons: I. Spin-independent amplitude
• Sum rules across the unpolarized Compton processes involving generalized polarizabilities and moments of nucleon structure functions
• Lepton universality test in the photoproduction of $e^{-}{e}^{+}$ versus ${\mu }^{-}{\mu }^{+}$ pairs on a proton target
• Virtual Compton Scattering and Nucleon Generalized Polarizabilities

Cited by in corpus (6)

• The proton structure in and out of muonic hydrogen
• Generalised parton distributions from the off-forward Compton amplitude in lattice QCD
• Lattice QCD calculation of the two-photon exchange contribution to the muonic-hydrogen Lamb shift
• Forward doubly-virtual Compton scattering off the nucleon in chiral perturbation theory: the subtraction function and moments of unpolarized structure functions
• Leading-order QED radiative corrections to timelike Compton scattering on the proton
• Soft-photon radiative corrections to the $e^{-}p\to e^{-}p{l}^{-}{l}^{+}$ process