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The sensitivity of the Deep Underground Neutrino Experiment (DUNE) to neutrino oscillation is determined, based on a full simulation, reconstruction, and event selection of the far detector and a full simulation and parameterized analysis of the near detector. Detailed uncertainties due to the flux prediction, neutrino interaction model, and detector effects are included. DUNE will resolve the neutrino mass ordering to a precision of 5σ, for all δCP values, after 2 years of running with the nominal detector design and beam configuration. It has the potential to observe charge-parity violation in the neutrino sector to a precision of 3σ (5σ) after an exposure of 5 (10) years, for 50% of all δCP values. It will also make precise measurements of other parameters governing long-baseline neutrino oscillation, and after an exposure of 15 years will achieve a similar sensitivity to sin22θ13 to current reactor experiments. ; Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359 ; National Council for Scientific and Technological Development (CNPq) ; Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ) ; FAPEG, Brazil ; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) ; Canada Foundation for Innovation ; IPP, Canada ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; CERN ; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government ; European Union (EU) ; Centre National de la Recherche Scientifique (CNRS) ; French Atomic Energy Commission ; Istituto Nazionale di Fisica Nucleare (INFN) ; Portuguese Foundation for Science and Technology ; NRF, South Korea ; CAM, Spain ; La Caixa Foundation ; Spanish Government ; SERI, Switzerland ; Swiss National Science Foundation (SNSF) ; Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) ; Royal Society of London ; UKRI/STFC, UK ; United States Department of Energy (DOE) ; National Science Foundation (NSF) ; National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility DE-AC02-05CH11231

The Deep Underground Neutrino Experiment is a next-generation neutrino oscillation experiment that aims to measure CP-violation in the neutrino sector as part of a wider physics program. A deep learning approach based on a convolutional neural network has been developed to provide highly efficient and pure selections of electron neutrino and muon neutrino charged-current interactions. The electron neutrino (antineutrino) selection efficiency peaks at 90% (94%) and exceeds 85% (90%) for reconstructed neutrino energies between 2–5 GeV. The muon neutrino (antineutrino) event selection is found to have a maximum efficiency of 96% (97%) and exceeds 90% (95%) efficiency for reconstructed neutrino energies above 2 GeV. When considering all electron neutrino and antineutrino interactions as signal, a selection purity of 90% is achieved. These event selections are critical to maximize the sensitivity of the experiment to CP-violating effects. ; Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359 ; National Council for Scientific and Technological Development (CNPq) ; Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ) ; FAPEG, Brazil ; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) ; Canada Foundation for Innovation ; Institute of Particle Physics, Canada ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; CERN ; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government ; ERDF, European Union ; H2020-EU, European Union ; MSCA, European Union ; Centre National de la Recherche Scientifique (CNRS) ; French Atomic Energy Commission ; Istituto Nazionale di Fisica Nucleare (INFN) ; Portuguese Foundation for Science and Technology European Commission ; NRF, South Korea ; Comunidad de Madrid ; La Caixa Foundation ; Spanish Government ; State Secretariat for Education, Research and Innovation, Switzerland ; Swiss National Science Foundation (SNSF) ; Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) ; Royal Society of London ; UKRI/STFC, United Kingdom ; United States Department of Energy (DOE) ; National Science Foundation (NSF)

The ProtoDUNE-SP detector was constructed and operated on the CERN Neutrino Platform. We thank the CERN management for providing the infrastructure for this experiment and gratefully acknowledge the support of the CERN EP, BE, TE, EN, IT and IPT Departments for NP04/ProtoDUNE-SP. This documentwas prepared by theDUNEcollaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. This work was supported by CNPq, FAPERJ, FAPEG and FAPESP, Brazil; CFI, IPP and NSERC, Canada; CERN; MSMT, Czech Republic; ERDF, H2020-EU and MSCA, European Union; CNRS/IN2P3 and CEA, France; INFN, Italy; FCT, Portugal; NRF, South Korea; CAM, Fundacion "La Caixa" and MICINN, Spain; SERI and SNSF, Switzerland; TUBITAK, Turkey; The Royal Society and UKRI/STFC, United Kingdom; DOE and NSF, United States of America. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231. ; The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber with an active volume of 7.2× 6.1× 7.0 m3. It is installed at the CERN Neutrino Platform in a specially-constructed beam that delivers charged pions, kaons, protons, muons and electrons with momenta in the range 0.3 GeV/c to 7 GeV/c. Beam line instrumentation provides accurate momentum measurements and particle identification. The ProtoDUNE-SP detector is a prototype for the first far detector module of the Deep Underground Neutrino Experiment, and it incorporates full-size components as designed for that module. This paper describes the beam line, the time projection chamber, the photon detectors, the cosmic-ray tagger, the signal processing and particle reconstruction. It presents the first results on ProtoDUNE-SP's performance, including noise and gain measurements, dE/dx calibration for muons, protons, pions and electrons, drift electron lifetime measurements, and photon detector noise, signal sensitivity and time resolution measurements. The measured values meet or exceed the specifications for the DUNE far detector, in several cases by large margins. ProtoDUNE-SP's successful operation starting in 2018 and its production of large samples of high-quality data demonstrate the effectiveness of the single-phase far detector design. ; National Council for Scientific and Technological Development (CNPq) ; Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ) ; FAPEG, Brazil ; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) ; Canada Foundation for Innovation ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government ; European Union (EU) ; H2020-EU ; French Atomic Energy Commission ; Istituto Nazionale di Fisica Nucleare (INFN) ; NRF, South Korea ; La Caixa Foundation ; Spanish Government ; Swiss National Science Foundation (SNSF) ; Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) ; Royal Society of London ; United States Department of Energy (DOE) ; National Science Foundation (NSF) DE-AC02-05CH11231 ; IPP, Canada ; CERN ; MSCA ; Centre National de la Recherche Scientifique (CNRS) ; Portuguese Foundation for Science and Technology ; CAM, Spain ; SERI, Switzerland ; UKRI/STFC, United Kingdom ; DE-AC02-07CH11359

This document was prepared by the DUNE collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. This work was supported by CNPq, FAPERJ, FAPEG and FAPESP, Brazil; CFI, IPP and NSERC, Canada; CERN; MŠMT, Czech Repub lic; ERDF, H2020-EU and MSCA, European Union; CNRS/IN2P3 and CEA, France; INFN, Italy; FCT, Portugal; NRF, South Korea; CAM, Fundación "La Caixa", Junta de Andalucía FEDER, and MICINN, Spain; SERI and SNSF, Switzerland; TÜBİTAK, Turkey; The Royal Society and UKRI/STFC, United Kingdom; DOE and NSF, United States of America. We are grateful to Xerxes Tata for useful discussions. C. Rott acknowledges support from the National Research Foundation of Korea. ; The observation of 236 MeV muon neutrinos from kaon-decay-at-rest (KDAR) originating in the core of the Sun would provide a unique signature of dark matter annihilation. Since excellent angle and energy reconstruction are necessary to detect this monoenergetic, directional neutrino flux, DUNE with its vast volume and reconstruction capabilities, is a promising candidate for a KDAR neutrino search. In this work, we evaluate the proposed KDAR neutrino search strategies by realistically modeling both neutrino-nucleus interactions and the response of DUNE. We find that, although reconstruction of the neutrino energy and direction is difficult with current techniques in the relevant energy range, the superb energy resolution, angular resolution, and particle identification offered by DUNE can still permit great signal/background discrimination. Moreover, there are non-standard scenarios in which searches at DUNE for KDAR in the Sun can probe dark matter interactions. ; Fermi National Accelerator Laboratory (Fermilab) No. DE-AC02-07CH11359. ; CNPq ; CNPq, FAPERJ, FAPEG y FAPESP, Brasil ; CFI, IPP y NSERC, Canadá ; CERN ; MŠMT, República Checa ; FEDER ; H2020-UE ; MSCA, Unión Europea ; CNRS/IN2P3 y CEA, Francia ; INFN, Italia ; FCT, Portugal ; NRF, Corea del Sur ; CAM, Fundación "La Caixa" ; Junta de Andalucía FEDER, y MICINN, España ; SERI y SNSF, Suiza ; TübİTAK, Turquía ; La Real Sociedad y UKRI/STFC, Reino Unido ; DOE y NSF, Estados Unidos de América

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-calendar years (kt-MW-CY), where calendar years include an assumption of 57% accelerator uptime based on past accelerator performance at Fermilab. 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 4σ (5σ) level with a 66 (100) kt-MW-CY far detector exposure, and has the ability to make strong statements at significantly shorter exposures depending on the true value of other oscillation parameters, with a median sensitivity of 3σ for almost all true δCP values after only 24 kt-MW-CY. We also show that DUNE has the potential to make a robust measurement of CPV at a 3σ level with a 100 kt-MW-CY exposure for the maximally CP-violating values δCP ¼ π=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. ; Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359 ; CNPq, FAPERJ, FAPEG and FAPESP, Brazil ; CFI, Institute of Particle Physics (IPP) and NSERC, Canada ; CERN ; MŠMT, Czech Republic ; ERDF, H2020-EU and MSCA, European Union ; CNRS/IN2P3 and CEA, France ; INFN, Italy ; FCT, Portugal ; NRF, South Korea ; Comunidad de Madrid (CAM), Fundación "La Caixa," Junta de Andalucía-FEDER, and MICINN, Spain ; SERI and SNSF, Switzerland ; TÜBİTAK, Turkey ; The Royal Society and UKRI/STFC, United Kingdom ; DOE and NSF, United States of America