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.

arXiv comment5 pages, 6 figures

References in corpus (23)

• Probing Cold Dense Nuclear Matter
• Momentum sharing in imbalanced Fermi systems
• Measurement of 2- and 3-Nucleon Short Range Correlation Probabilities in Nuclei
• Tensor Forces and the Ground-State Structure of Nuclei
• New measurements of high-momentum nucleons and short-range structures in nuclei
• Nucleon and nucleon-pair momentum distributions in A <= 12 nuclei
• Investigation of Proton-Proton Short-Range Correlations via the 12C(e,e'pp) Reaction
• Probing the Repulsive Core of the Nucleon-Nucleon Interaction via the 4He(e,e'pN) Triple-Coincidence Reaction
• The 2p-2h electromagnetic response in the quasielastic peak and beyond
• Inclusive electron scattering within the SuSAv2-MEC approach
• The detection of back-to-back proton pairs in Charged-Current neutrino interactions with the ArgoNeuT detector in the NuMI low energy beam line
• Extracting the Mass Dependence and Quantum Numbers of Short-Range Correlated Pairs from A(e,e'p) and A(e,e'pp) Scattering
• Stylized features of single-nucleon momentum distributions
• Inclusive $(e,e^{\prime }N)$, $(e,e^{\prime }NN)$, $(e,e^{\prime }\pi )$ ... reactions in nuclei
• Pionic correlations and meson-exchange currents in two-particle emission induced by electron scattering
• Relativistic effects in two-particle emission for electron and neutrino reactions
• Measurement of transparency ratios for protons from short-range correlated pairs
• Final-state interactions in two-nucleon knockout reactions
• Angular distribution in two-particle emission induced by neutrinos and electrons
• Hammer events, neutrino energies, and nucleon-nucleon correlations
• Search for nucleon-nucleon correlations in neutrino-argon scattering
• Measurement of the 12C(e,e'p)11B Two-Body Breakup Reaction at High Missing Momentum Values
• Neutrino-nucleus interactions and the short-range structure of nuclei

Cited by in corpus (7)

• Charged-current neutrino-nucleus reactions within the SuSAv2-MEC approach
• Implementation of the SuSAv2-MEC 1p1h and 2p2h models in GENIE and analysis of nuclear effects in T2K measurements
• Electron- versus neutrino-nucleus scattering
• Neutrino event generators: foundation, status and future
• Neutrino-Oxygen CC0$\pi$ scattering in the SuSAv2-MEC model
• 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