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An Oxygen Target for (Anti)neutrinos

We discuss a method to obtain an effective oxygen target within a low-density detector allowing an accurate characterization of the various event topologies in $ν(\bar ν)$-oxygen interactions. Results can be of interest for long-baseline neutrino oscillation experiments utilizing water targets. In particular, the combination of both oxygen and hydrogen targets within the same detector can provide in-situ measurements of nuclear effects and of the (anti)neutrino flux, which are the leading sources of systematic uncertainties in long-baseline oscillation analyses. These measurements can also provide useful information about the nuclear modifications of bound nucleons, as well as about the isospin symmetry in nucleons and nuclei.