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The quasielastic cross-section of charged-current neutrino and antineutrinoscattering on $^{12}$C is calculated using an improved superscaling model withrelativistic effective mass. Our model encompasses two-particle emissioninduced by neutrinos, which we distinguish into two contributions. The firstcontribution arises from meson-exchange currents, and its calculation isperformed at a microscopic level. The second contribution is phenomenologicaland extracted from the high-energy tail of the scaling function, assumed to beproduced by 2p2h mechanisms where the one-body current plays a role, such asshort-range correlations and interferences with MEC, final-state interaction,etc. The model explicitly includes the modification of the relativisticeffective mass of the nucleon within the relativistic mean field model ofnuclear matter. The meson exchange currents are also consistently calculatedwithin the same model. With this model, we present predictions for the neutrinoand antineutrino cross sections of $^{12}$C that have been measured inaccelerator experiments.

Charged-current quasielastic neutrino scattering from $^{12}$C in an extended superscaling model with two-nucleon emission