2020/12/31 by Jogesh Rout, J. Rout, Sheeba Shafaq +4
Engineering · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Beam (structure) #Context (archaeology) #Electronic engineering #Maxima #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Optics #Oscillation (cell signaling) #Particle accelerators and beam dynamics #Particle physics #Physics #Range (aeronautics) #Sensitivity (control systems) #hep-ph
paper · pdf · open access · doi:10.1103/physrevd.103.116003
published in Physical review. D/Physical review. D. 103(11) (American Physical Society) · to appear in Phys. Rev. D
arxiv created 2021/04/16 · openalex publication_date 2021/06/02 · arxiv updated 2021/06/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Current long-baseline neutrino-oscillation experiments such as NO\ensuremathνA and T2K are mainly sensitive to physics in the neighborhood of the first oscillation maximum of the \ensuremathν_\ensuremathμ\ensuremath→\ensuremathνe oscillation probability. The future Deep Underground Neutrino Experiment (DUNE) utilizes a wide-band beam tune optimized for CP-violation sensitivity that fully covers the region of the first maxima and part of the second. In the present study, we elucidate the role of second oscillation maximum in addressing issues pertaining to unknowns in the standard three-flavor paradigm. We consider a new DUNE beam tune optimized for coverage of the region of the second oscillation maxima which could be realized using proposed accelerator upgrades that provide multimegawatts of power at proton energies of 8 GeV. We find that the addition of the multimegawatt 8 GeV beam to DUNE wide-band running leads to modest improvement in sensitivity to CP violation, mass hierarchy, and the octant of \ensuremathθ23 as well as the resolution of \ensuremathδ and the Jarlskog invariant. Significant improvements to the DUNE neutrino energy resolution yield a much larger improvement in performance. We conclude that the standard DUNE wide-band beam when coupled with excellent detector resolution capabilities is sufficient to resolve \ensuremathδ to better than \ensuremath∼12\ifmmode^∘\else\textdegree\fi for all values of \ensuremathδ in a decade of running. For second maxima (8 GeV, 3 MW) beam running concurrently with the standard wide-band (80 GeV, 2.2 MW) beam for five of the 10 years, it is found that \ensuremathδ can be further resolved better than \ensuremath∼10\ifmmode^∘\else\textdegree\fi for all values of \ensuremathδ.