Evidence of antineutrinos from distant reactors using pure water at SNO+

TY - JOUR

T1 - Evidence of antineutrinos from distant reactors using pure water at SNO+

AU - Wilson, Jeanne

AU - Di Lodovico, Francesca

N1 - Funding Information: Capital construction funds for the experiment were provided by the Canada Foundation for Innovation (CFI) and matching partners. This research was supported by the Natural Sciences and Engineering Research Council, the Canadian Institute for Advanced Research (CIFAR), the Queen’s University at Kingston, the Ontario Ministry of Research, Innovation and Science, the Alberta Science and Research Investments Program, the Federal Economic Development Initiative for Northern Ontario, and the Ontario Early Researcher Awards in Canada; the Department of Energy Office of Nuclear Physics, the National Science Foundation, and the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium in the U.S.; the Science and Technology Facilities Council (STFC), the European Union’s Seventh Framework Programme under the European Research Council (ERC) grant agreement, and the Marie Curie grant agreement in the United Kingdom; Fundaçáo para a Ciência e a Tecnologia (FCT-Portugal) in Portugal; the Deutsche Forschungsgemeinschaft in Germany; DGAPA-UNAM and Consejo Nacional de Ciencia y Tecnología in Mexico; and the Discipline Construction Fund of Shandong University in China. We thank the technical staff for their strong contributions. We would like to thank SNOLAB and its staff for support through underground space, logistical, and technical services. SNOLAB operations are supported by CFI and the Province of Ontario Ministry of Research and Innovation, with underground access provided by Vale at the Creighton mine site. This research was enabled in part by support provided by WestGRID and Compute Canada —in particular, computer systems and support from the University of Alberta and from Simon Fraser University , and by the GridPP Collaboration—in particular, computer systems and support from Rutherford Appleton Laboratory . Additional high-performance computing was provided through the “Illume” cluster funded by CFI and the Alberta Economic Development and Trade (EDT) and operated by ComputeCanada and the Savio computational cluster resource provided by the Berkeley Research Computing program at the University of California, Berkeley (supported by the UC Berkeley Chancellor, Vice Chancellor for Research, and Chief Information Officer). Additional long-term storage was provided by the Fermilab Scientific Computing Division. Fermilab is managed by the Fermi Research Alliance, LLC (FRA) under a Contract with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. Funding Information: Capital construction funds for the SNO+ experiment were provided by the Canada Foundation for Innovation (CFI) and matching partners. This research was supported by the Natural Sciences and Engineering Research Council, the Canadian Institute for Advanced Research (CIFAR), the Queen’s University at Kingston, the Ontario Ministry of Research, Innovation and Science, the Alberta Science and Research Investments Program, the Federal Economic Development Initiative for Northern Ontario, and the Ontario Early Researcher Awards in Canada; the Department of Energy Office of Nuclear Physics, the National Science Foundation, and the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium in the U.S.; the Science and Technology Facilities Council (STFC), the European Union’s Seventh Framework Programme under the European Research Council (ERC) grant agreement, and the Marie Curie grant agreement in the United Kingdom; Fundaçáo para a Ciência e a Tecnologia (FCT-Portugal) in Portugal; the Deutsche Forschungsgemeinschaft in Germany; DGAPA-UNAM and Consejo Nacional de Ciencia y Tecnología in Mexico; and the Discipline Construction Fund of Shandong University in China. We thank the SNO+ technical staff for their strong contributions. We would like to thank SNOLAB and its staff for support through underground space, logistical, and technical services. SNOLAB operations are supported by CFI and the Province of Ontario Ministry of Research and Innovation, with underground access provided by Vale at the Creighton mine site. This research was enabled in part by support provided by WestGRID [38] and Compute Canada [39]—in particular, computer systems and support from the University of Alberta [40] and from Simon Fraser University [41], and by the GridPP Collaboration—in particular, computer systems and support from Rutherford Appleton Laboratory [42,43]. Additional high-performance computing was provided through the “Illume” cluster funded by CFI and the Alberta Economic Development and Trade (EDT) and operated by ComputeCanada and the Savio computational cluster resource provided by the Berkeley Research Computing program at the University of California, Berkeley (supported by the UC Berkeley Chancellor, Vice Chancellor for Research, and Chief Information Officer). Additional long-term storage was provided by the Fermilab Scientific Computing Division. Fermilab is managed by the Fermi Research Alliance, LLC (FRA) under a Contract with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. Publisher Copyright: © 2023 American Physical Society.

PY - 2023/3/3

Y1 - 2023/3/3

N2 - The SNO+ Collaboration reports the first evidence of reactor antineutrinos in a Cherenkov detector. The nearest nuclear reactors are located 240 km away in Ontario, Canada. This analysis uses events with energies lower than in any previous analysis with a large water Cherenkov detector. Two analytical methods are used to distinguish reactor antineutrinos from background events in 190 days of data and yield consistent evidence for antineutrinos with a combined significance of 3.5σ.

AB - The SNO+ Collaboration reports the first evidence of reactor antineutrinos in a Cherenkov detector. The nearest nuclear reactors are located 240 km away in Ontario, Canada. This analysis uses events with energies lower than in any previous analysis with a large water Cherenkov detector. Two analytical methods are used to distinguish reactor antineutrinos from background events in 190 days of data and yield consistent evidence for antineutrinos with a combined significance of 3.5σ.

UR - http://www.scopus.com/inward/record.url?scp=85149642537&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.130.091801

DO - 10.1103/PhysRevLett.130.091801

M3 - Article

SN - 0031-9007

VL - 130

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 091801

ER -