TY - JOUR

T1 - Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment

AU - DUNE Collaboration

AU - Abud, A. Abed

AU - Abi, B.

AU - Acciarri, R.

AU - Acero, M. A.

AU - Adames, M. R.

AU - Adamov, G.

AU - Adams, D.

AU - Adinolfi, M.

AU - Aduszkiewicz, A.

AU - Aguilar, J.

AU - Ahmad, Z.

AU - Ahmed, J.

AU - Aimard, B.

AU - Ali-Mohammadzadeh, B.

AU - Alion, T.

AU - Allison, K.

AU - Monsalve, S. Alonso

AU - AlRashed, M.

AU - Alt, C.

AU - Alton, A.

AU - Amedo, P.

AU - Anderson, J.

AU - Andreopoulos, C.

AU - Andreotti, M.

AU - Andrews, M. P.

AU - Andrianala, F.

AU - Andringa, S.

AU - Anfimov, N.

AU - Ankowski, A.

AU - Antoniassi, M.

AU - Antonova, M.

AU - Antoshkin, A.

AU - Antusch, S.

AU - Aranda-Fernandez, A.

AU - Arnold, L. O.

AU - Arroyave, M. A.

AU - Asaadi, J.

AU - Asquith, L.

AU - Aurisano, A.

AU - Aushev, V.

AU - Autiero, D.

AU - Ayala-Torres, M.

AU - Azfar, F.

AU - Blake, A.

AU - Brailsford, D.

AU - Cross, R.

AU - Mouster, G.

AU - Nowak, J. A.

AU - Ratoff, P.

PY - 2022/4/25

Y1 - 2022/4/25

N2 - The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE's sensitivity to observe charge-parity violation (CPV) in the neutrino sector, and to resolve the mass ordering, for exposures of up to 100 kiloton-megawatt-years (kt-MW-yr). The analysis includes detailed uncertainties on the flux prediction, the neutrino interaction model, and detector effects. We demonstrate that DUNE will be able to unambiguously resolve the neutrino mass ordering at a 3$\sigma$ (5$\sigma$) level, with a 66 (100) kt-MW-yr far detector exposure, and has the ability to make strong statements at significantly shorter exposures depending on the true value of other oscillation parameters. We also show that DUNE has the potential to make a robust measurement of CPV at a 3$\sigma$ level with a 100 kt-MW-yr exposure for the maximally CP-violating values $\delta_{\rm CP}} = \pm\pi/2$. Additionally, the dependence of DUNE's sensitivity on the exposure taken in neutrino-enhanced and antineutrino-enhanced running is discussed. An equal fraction of exposure taken in each beam mode is found to be close to optimal when considered over the entire space of interest.

AB - The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE's sensitivity to observe charge-parity violation (CPV) in the neutrino sector, and to resolve the mass ordering, for exposures of up to 100 kiloton-megawatt-years (kt-MW-yr). The analysis includes detailed uncertainties on the flux prediction, the neutrino interaction model, and detector effects. We demonstrate that DUNE will be able to unambiguously resolve the neutrino mass ordering at a 3$\sigma$ (5$\sigma$) level, with a 66 (100) kt-MW-yr far detector exposure, and has the ability to make strong statements at significantly shorter exposures depending on the true value of other oscillation parameters. We also show that DUNE has the potential to make a robust measurement of CPV at a 3$\sigma$ level with a 100 kt-MW-yr exposure for the maximally CP-violating values $\delta_{\rm CP}} = \pm\pi/2$. Additionally, the dependence of DUNE's sensitivity on the exposure taken in neutrino-enhanced and antineutrino-enhanced running is discussed. An equal fraction of exposure taken in each beam mode is found to be close to optimal when considered over the entire space of interest.

KW - hep-ex

KW - physics.ins-det

U2 - 10.1103/PhysRevD.105.072006

DO - 10.1103/PhysRevD.105.072006

M3 - Journal article

VL - 105

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 7

M1 - 072006

ER -