Intrinsic limits on resolutions in muon- and electron-neutrino   charged-current events in the KM3NeT/ORCA detector
  Studying atmospheric neutrino oscillations in the few-GeV range with a multimegaton detector promises to determine the neutrino mass hierarchy. This is the main science goal pursued by the future KM3NeT/ORCA water Cherenkov detector in the Mediterranean Sea. In this paper, the processes that limit the obtainable resolution in both energy and direction in charged-current neutrino events in the ORCA detector are investigated. These processes include the composition of the hadronic fragmentation products, the subsequent particle propagation and the photon-sampling fraction of the detector. GEANT simulations of neutrino interactions in seawater produced by GENIE are used to study the effects in the 1 - 20 GeV range. It is found that fluctuations in the hadronic cascade in conjunction with the variation of the inelasticity y are most detrimental to the resolutions. The effect of limited photon sampling in the detector is of significantly less importance. These results will therefore also be applicable to similar detectors/media, such as those in ice. 
S. Adri\'an-Mart\'inez, M. Ageron, S. Aiello, A. Albert, F. Ameli, E.   G. Anassontzis, M. Andre, G. Androulakis, M. Anghino...
physics.ins-det hep-ex hep-ph