Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents

Abstract

We use a relativistic model of meson-exchange currents to compute the proton-neutron and proton-proton yields in $(e,e^{\prime })$ scattering from ${}^{12}$C in the 2p-2h channel. We compute the response functions and cross section with the relativistic Fermi gas model for a range of kinematics from intermediate to high momentum transfers. We find a large contribution of neutron-proton configurations in the initial state, as compared to proton-proton pairs. The different emission probabilities of distinct species of nucleon pairs are produced in our model only by meson-exchange currents, mainly by the $\Delta$ isobar current. We also analyze the effect of the exchange contribution and show that the direct/exchange interference strongly affects the determination of the np/pp ratio.

5 pages, 6 figures

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Cited by in corpus (4)

• Charged-current neutrino-nucleus reactions within the SuSAv2-MEC approach
• Electron- versus neutrino-nucleus scattering
• Final state interactions in semi-inclusive neutrino-nucleus scattering: Application to T2K and MINER$\nu$A experiments
• A realistic spectral function model for charged-current quasielastic-like neutrino and antineutrino cross sections on ${}^{12}$C