Impact of improved energy resolution on DUNE sensitivity to neutrino non-standard interactions

Abstract

The full physics potential of the next-generation Deep Underground Neutrino Experiment (DUNE) is still being explored. In particular, there have been some recent studies on the possibility of improving DUNE’s neutrino energy reconstruction. The main motivation is that a better determination of the neutrino energy in an event-by-event basis will translate into an improved measurement of the Dirac C P phase and other neutrino oscillation parameters. To further motivate studies and improvements on the neutrino energy reconstruction, we evaluate the impact of energy resolution at DUNE on an illustrative new physics scenario, viz. non-standard interactions (NSI) of neutrinos with matter. We show that a better energy resolution in comparison to the ones given in the DUNE conceptual and technical design reports may significantly enhance the experimental sensitivity to NSI, particularly when degeneracies are present. While a better reconstruction of the first oscillation peak helps disentangling standard C P effects from those coming from NSIs, we find that the second oscillation peak also plays a nontrivial role in improving DUNE’s sensitivity.

Model-independent test of T violation in neutrino oscillations

“…Within some modest assumptions, the test can be performed already with experiments at three different baselines plus near detectors. The crucial requirements are sufficient event numbers in the neutrino energy overlap region between the experiments and good neutrino energy reconstruction [5,6]. Our estimates show that with the planned long-baseline experiments DUNE, T2HK, and T2HKK, this test can be potentially carried out.…”

Improving CP Measurement with THEIA and Muon Decay at Rest

“…For fixed matter effect (q = 1), the CP uncertainty peaks around δ true D ≈ 70 • and 250 • which are consistent with [62,128,130,131] where either fixed matter effect or just 2% uncertainty is adopted. Slightly shifted peaks at δ true D ≈ 90 • and 270 • are obtained and attributed to different treatment of systematics in [132].…”

Probing Neutrino Mass Models through Resonances at Neutrino Telescopes

“…[9]. For comparison, we also show the future DUNE sensitivity in blue dashed line [89]. Figure updated from Ref.…”

“…4 that the existing limits on NSI are more stringent than the current sensitivity of high-energy IceCube data. Nevertheless, the (non)observation of a resonance-like signature in the future IceCube HESE data might serve as a complementary probe of the allowed NSI parameter space within the Zee model of neutrino mass, which can even supersede the future DUNE sensitivity (shown by the blue dashed line [89]) and e + e − collider sensitivity [90]. We should point out that an exposure of 10T 0 (with T 0 being roughly 7.5 years) does not necessarily require 75 years of IceCube running, since a variety of unforeseen factors could improve the conservative projected IceCube limits presented here in a non-linear fashion.…”