Density dependence of 2p-2h meson-exchange currents

Abstract

We analyze the density dependence of the contribution of meson-exchange currents to the lepton-nucleus inclusive cross section in the two-particle two-hole channel. The model is based on the Relativistic Fermi Gas, where each nucleus is characterized by its Fermi momentum $k_F$. We find that the 2p-2h nuclear response functions at their peaks scale as $A{k}_F^2$ for Fermi momentum going from 200 to 300 MeV/c and momentum transfer $q$ from $2k_F$ to 2 GeV/c. This behavior is different from what is found for the quasielastic response, which scales as $A/k_F$. Additionally, the deep scaling region is also discussed and there the usual scaling behavior is found to be preferable.

9 pages, 8 figures

References in corpus (10)

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• Mean field and two-body nuclear effects in inclusive electron scattering on argon, carbon and titanium: the superscaling approach
• Analysis of the MINERvA antineutrino double-differential cross sections within the SuSAv2 model including meson-exchange currents
• Two-nucleon emission in neutrino and electron scattering from nuclei: the modified convolution approximation
• Asymmetric Relativistic Fermi Gas model for quasielastic lepton-nucleus scattering
• Multinucleon excitations in neutrino-nucleus scattering: connecting different microscopic models for the correlations
• Neutrino-Nucleus scattering in the SuSA model