Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment
Metadatos
Afficher la notice complèteAuteur
Abed Abud, A.; García Gámez, Diego; Nicolás Arnaldos, Francisco Javier; Zamorano García, Bruno; Dune CollaborationEditorial
American Physical Society
Date
2022-04-25Referencia bibliográfica
Abud, A. A... [et al.] (2022). Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment. Physical Review D, 105(7), 072006. DOI: [10.1103/PhysRevD.105.072006]
Patrocinador
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 AmericaRésumé
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.