Effect of the $2p2h$ cross-section uncertainties on an analysis of   neutrino oscillations
  We report the results of a study aimed at quantifying the impact on the oscillation analysis of the uncertainties associated with the description of the neutrino-nucleus cross section in the two-particle--two-hole sector. The results of our calculations, based on the kinematic method of energy reconstruction and carried out comparing two data-driven approaches, show that the existing discrepancies in the neutrino cross sections have a sizable effect on the extracted oscillation parameters, particularly in the antineutrino channel. 
Artur M. Ankowski, Omar Benhar, Camillo Mariani, and Erica Vagnoni
hep-ph hep-ex nucl-th