Analysis of the MINERvA antineutrino double-differential cross sections within the SuSAv2 model including meson-exchange currents

TL;DR

This paper evaluates the SuSAv2 model with meson-exchange currents against MINERvA antineutrino data, showing good agreement and highlighting the importance of longitudinal MEC and $elta$-resonance treatment.

Contribution

It demonstrates that the relativistic SuSAv2 model accurately describes antineutrino cross sections without tuning and explores the effects of different $elta$-resonance treatments.

Findings

SuSAv2 model matches MINERvA data well

Longitudinal MEC significantly improve data agreement

Different $elta$-resonance treatments impact results

Abstract

We compare the results of the SuSAv2 model including meson-exchange currents (MEC) with the recent measurement of the quasielastic-like double differential antineutrino cross section on hydrocarbon (CH) performed by the MINERvA Collaboration. The relativistic nature of the model makes it suitable to describe these data, which correspond to a mean beam energy of 3.5 GeV. The standard SuSAv2 model predictions agree well with the data without needing any additional or tuned parameter. The role of longitudinal MEC is non-negligible and improves the agreement with the data. We also consider the impact of different treatments of the $\Delta$-resonance propagator in the two-body currents on the data comparison.