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

G.D. Megias (1) , M.B. Barbaro , J.A. Caballero , S. Dolan (1, 2)

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 LLR - Laboratoire Leprince-Ringuet

We compare the results of the SuSAv2 model including meson-exchange currents (MEC) with the recent measurement of the quasielasticlike double differential antineutrino cross section on a hydrocarbon performed by the MINERvA Collaboration [C. E. Patrick (MINERvA Collaboration), Phys. Rev. D 97, 052002 (2018)10.1103/PhysRevD.97.052002]. 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 Δ-resonance propagator in the two-body currents on the data comparison.

Mots clés: Electroweak interactions; beam: energy; neutrino nucleus: scattering; MINERvA; neutrino: scattering; nucleon: form factor; meson: exchange; charged current; differential cross section; impulse approximation; total cross section; energy dependence; mean field approximation: relativistic

Domaines: Physique Nucléaire Théorique [nucl-th]

G.D. Megias, M.B. Barbaro, J.A. Caballero, S. Dolan. Analysis of the MINERvA antineutrino double-differential cross sections within the SuSAv2 model including meson-exchange currents. Physical Review D, 2019, 99 (11), pp.113002. ⟨10.1103/PhysRevD.99.113002⟩. ⟨hal-01858075⟩