Current long-baseline neutrino experiments and future prospects
ORAL · Invited
Abstract
Long-baseline neutrino oscillation searches look for the appearance of electron (anti)neutrinos and the disappearance of muon (anti)neutrinos, in a powerful and high-purity muon (anti)neutrino beam. The beam is sampled close to its source and then again with a far defector hundreds of kilometers away. Current long-baseline experiments use this technique to measure the parameters that govern neutrino mixing. Collecting data for most of the past decade, these experiments continue working towards precision measurements of neutrino mixing, yet key quantities, such as charge-parity violation in the lepton sector and the ordering of neutrino masses, remain unknown. NOvA uses the powerful NuMI beam at Fermilab, directed towards a far detector 810 km away in Ash River, Minnesota. T2K has a shorter baseline of 295 km, using a beam from J-PARC, in Tokai, directed at the Super-Kamiokande detector near Kamioka, Japan. Both experiments are working towards a joint analysis of their data that will be crucial for resolving degeneracies in their individual measurements. In this talk, I will provide a snapshot of recent results from both experiments and discuss progress toward a NOvA-T2K joint analysis. The joint analysis will also set the scene for the next generation of long-baseline experiments (such as DUNE and T2HK). They will start taking data towards the end of this decade and provide many high-precision measurements of neutrino oscillations over the coming decades.
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Publication: The NOvA Collaboration et al., Improved Measurement of Neutrino Oscillation Parameters by the NOvA Experiment, Phys. Rev. D 106, 032004 (2022). http://dx.doi.org/10.1103/PhysRevD.106.032004<br>K. Abe et al., Improved Constraints on Neutrino Mixing from the T2K Experiment with $mathbf3.13 imes10^21$ Protons on Target, Phys. Rev. D 103, 112008 (2021). http://dx.doi.org/10.1103/PhysRevD.103.112008
Presenters
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Ashley Back
Indiana University
Authors
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Ashley Back
Indiana University