https://doi.org/10.1140/epjc/s10052-024-13687-5
Regular Article - Experimental Physics
Initial measurement of reactor antineutrino oscillation at SNO+
1
Department of Physics, Engineering Physics and Astronomy, Queen’s University, K7L 3N6, Kingston, ON, Canada
2
LIP-Laboratório de Instrumentação e Física Experimental de Partículas, Av. Prof. Gama Pinto, 2, 1649-003, Lisbon, Portugal
3
Department of Physics, University of California, Berkeley, 94720, Berkeley, CA, USA
4
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, 94720-8153, Berkeley, CA, USA
5
Department of Physics, University of Alberta, 4-181 CCIS, T6G 2E1, Edmonton, AB, Canada
6
Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, 19104-6396, Philadelphia, PA, USA
7
SNOLAB, Creighton Mine #9, 1039 Regional Road 24, P3Y 1N2, Sudbury, ON, Canada
8
Instituto Superior Técnico (IST), Departamento de Física, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisbon, Portugal
9
LIP-Laboratório de Instrumentação e Física Experimental de Partículas, Rua Larga, 3004-516, Coimbra, Portugal
10
Departamento de Física (FCTUC), Universidade de Coimbra, 3004-516, Coimbra, Portugal
11
Physics and Astronomy, University of Sussex, Pevensey II, Falmer, BN1 9QH, Brighton, UK
12
School of Natural Sciences, Laurentian University, 935 Ramsey Lake Road, P3E 2C6, Sudbury, ON, Canada
13
The Denys Wilkinson Building, University of Oxford, Keble Road, OX1 3RH, Oxford, UK
14
The Enrico Fermi Institute and Department of Physics, The University of Chicago, 60637, Chicago, IL, USA
15
Department of Physics, King’s College London, Strand Building, Strand, WC2R 2LS, London, UK
16
Department of Physics, University of Liverpool, L69 3BX, Liverpool, UK
17
Institut für Kern und Teilchenphysik, Technische Universität Dresden, Zellescher Weg 19, 01069, Dresden, Germany
18
Instituto de Física, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 20-364, 01000, Mexico D.F., Mexico
19
Department of Physics, Boston University, 590 Commonwealth Avenue, 02215, Boston, MA, USA
20
TRIUMF, 4004 Wesbrook Mall, V6T 2A3, Vancouver, BC, Canada
21
Physics Department, Lancaster University, LA1 4YB, Lancaster, UK
22
Faculdade de Ciências (FCUL), Departamento de Física, Campo Grande, Universidade de Lisboa, Edifício C8, 1749-016, Lisbon, Portugal
23
Chemistry Department, Brookhaven National Laboratory, P.O. Box 5000, Building 555, 11973-500, Upton, NY, USA
24
University of California, Davis, 1 Shields Avenue, 95616, Davis, CA, USA
25
Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, T6G 2G2, Edmonton, Alberta, Canada
26
Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
27
Research Center for Particle Science and Technology, Institute of Frontier and Interdisciplinary Science, Shandong University, 266237, Qingdao, Shandong, China
28
Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education, Shandong University, 266237, Qingdao, Shandong, China
a
llebanowski@gmail.com
b
llebanowski@gmail.com
Received:
6
September
2024
Accepted:
5
December
2024
Published online:
10
January
2025
The SNO collaboration reports its first spectral analysis of long-baseline reactor antineutrino oscillation using 114 tonne-years of data. Fitting the neutrino oscillation probability to the observed energy spectrum yields constraints on the neutrino mass-squared difference
. In the ranges allowed by previous measurements, the best-fit
is (
)
. This measurement is continuing in the next phases of SNO+ and is expected to surpass the present global precision on
with about three years of data.
© The Author(s) 2025
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