Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers

Abstract

The effects of meson-exchange currents (MEC) are computed for the one-particle one-hole transverse response function for finite nuclei at high momentum transfers $q$ in the region of the quasielastic peak. A semi-relativistic shell model is used for the one-particle-emission $(e,e^{\prime })$ reaction. Relativistic effects are included using relativistic kinematics, performing a semi-relativistic expansion of the current operators and using the Dirac-equation-based (DEB) form of the relativistic mean field potential for the final states. It is found that final-state interactions (FSI) produce an important enhancement of the MEC in the high-energy tail of the response function for $q\ge 1$ GeV/c. The combined effect of MEC and FSI goes away when other models of the FSI, not based on the DEB potential, are employed.

4 pages, 5 figures

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• Meson-exchange currents and quasielastic predictions for charged-current neutrino-12C scattering in the superscaling approach
• Relativistic analyses of quasielastic neutrino cross sections at MiniBooNE kinematics
• Pionic correlations and meson-exchange currents in two-particle emission induced by electron scattering
• Scaling Function, Spectral Function and Nucleon Momentum Distribution in Nuclei
• Final-state interactions in neutrino-induced proton knockout from argon in MicroBooNE
• Meson-exchange currents in quasielastic electron scattering in a generalized superscaling approach
• Nuclear effects in charged-current quasielastic neutrino-nucleus scattering
• Connecting scaling with short-range correlations
• Improved superscaling description of electron and charged-current neutrino quasielastic scattering using effective mass dynamics
• Nuclear effects in neutrino-nucleus interactions