| Title: |
Search for Very-Short-Baseline Oscillations of Reactor Antineutrinos with the SoLid Detector |
| Authors: |
Abreu, Y; Amhis, Y; Arnold, L; Beaumont, W; Bolognino, I; Bongrand, M; Boursette, D; Buridon, V; Chanal, H; Coupé, B; Crochet, P; Cussans, D; d'Hondt, J; Durand, D; Fallot, M; Galbinski, D; Gallego, S; Ghys, L; Giot, L; Graves, K; Guillon, B; Hayashida, S; Henaff, D; Hosseini, B; Kalcheva, S; Kalousis, L.N; Keloth, R; Koch, L; Labare, M; Lehaut, G; Manley, S; Manzanillas, L; Mermans, J; Michiels, I; Monteil, S; Moortgat, C; Newbold, D; Pestel, V; Petridis, K; Piñera, I; de Roeck, A; Roy, N; Ryckbosch, D; Ryder, N; Saunders, D; Schune, M.H; Settimo, M; Sfar, H. Rejeb; Simard, L; Vacheret, A; van Dyck, S; van Mulders, P; van Remortel, N; Vandierendonck, G; Vercaemer, S; Verstraeten, M; Viaud, B; Weber, A; Yeresko, M; Yermia, F |
| Contributors: |
Universiteit Antwerpen = University of Antwerp; Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS); University of Bristol Bristol; Department of Physics, The University of Adelaide; Laboratoire de physique corpusculaire de Caen (LPCC); Université de Caen Normandie (UNICAEN); Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN); Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Laboratoire de Physique de Clermont (LPC); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA); Belgian Nuclear Research Centre Mol, Belgique (SCK-CEN); Vrije Universiteit Brussel Bruxelles (VUB); Laboratoire de physique subatomique et des technologies associées (SUBATECH); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST); Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ); Universitätsmedizin der Johannes Gutenberg-Universität Mainz - University Medical Center of the Johannes Gutenberg-University Mainz Germany; Department of Physics Imperial College London; Imperial College London; King‘s College London; Universiteit Gent = Ghent University = Université de Gand (UGent); STFC Rutherford Appleton Laboratory (RAL); Science and Technology Facilities Council (STFC); University of Oxford; Ecole Royale Militaire / Koninklijke Militaire School (ERM KMS); Fermi National Accelerator Laboratory (Fermilab); SoLid |
| Source: |
ISSN: 2470-0010. |
| Publisher Information: |
CCSD; American Physical Society |
| Publication Year: |
2025 |
| Subject Terms: |
antineutrino; nuclear reactor; positron; energy; particle; oscillation; frequentist; Bayesian; imaging; anomaly; sterile; scintillation counter; [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] |
| Description: |
International audience ; In this letter we report the first scientific result based on antineutrinos emitted from the BR2 reactor at SCK CEN. The SoLid experiment uses a novel type of highly granular detector whose basic detection unit combines two scintillators, PVT and 6LiF:ZnS(Ag), to measure antineutrinos via their inverse-beta-decay products. An advantage of PVT is its highly linear response as a function of deposited particle energy. The full-scale detector comprises 12800 voxels and operates over a very short 6.3--8.9 m baseline from the reactor core. The detector segmentation and its 3D imaging capabilities facilitate the extraction of the positron energy from the rest of the visible energy, allowing the latter to be utilised for signal-background discrimination. We present a result based on 280 reactor-on days (55 MW mean power) and 172 reactor-off days, respectively, of live data-taking. A total of 29479 $\pm$ 603 (stat.) antineutrino candidates have been selected, corresponding to an average rate of 105 events per day and a signal-to-background ratio of 0.27. A search for disappearance of antineutrinos to a sterile state has been conducted using complementary model-dependent frequentist and Bayesian fits, providing constraints on the allowed region of the Reactor Antineutrino Anomaly. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2407.14382; ARXIV: 2407.14382; INSPIRE: 2809358 |
| DOI: |
10.1103/PhysRevD.111.072005 |
| Availability: |
https://hal.science/hal-04659001; https://hal.science/hal-04659001v1/document; https://hal.science/hal-04659001v1/file/2407.14382v1.pdf; https://doi.org/10.1103/PhysRevD.111.072005 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.6A83569C |
| Database: |
BASE |