Speaker
Description
Precise neutrino oscillation measurements in DUNE's large LArTPCs require a comprehensive treatment of detector systematic uncertainties. We present a framework to model the dominant detector effects shaping atmospheric neutrino reconstruction, specifically focusing on electron-ion recombination, charge attenuation, and diffusion. These processes are parameterized and propagated to key observables, such as reconstructed energy and zenith angle, to generate covariance matrices compatible with standard oscillation fitting tools. To circumvent the high computational cost of full detector simulations, we are also investigating a fast-modeling approach which rescales collected charge using analytical formulae or templates. This method reproduces major detector variations while enabling the large-scale systematic studies necessary for physics analyses. The presented framework is modular and easily extensible to other analyses (e.g., beam-generated neutrinos), thus providing a unified strategy for DUNE far detector systematic uncertainties, representing a foundational step toward achieving DUNE's precision physics goals.