The direction of individual solar neutrinos has been reconstructed using the liquid scintillator detector. Prompt, directional Cherenkov light was separated from the slower, isotropic scintillation light using time information, and a maximum likelihood method was used to reconstruct the direction of individual scattered electrons. A clear directional signal was observed, correlated with the solar angle. The observation was aided by a period of low primary fluor concentration that resulted in a slower scintillator decay time. This is the first time that event-by-event direction reconstruction in high light-yield liquid scintillator has been demonstrated in a large-scale detector.
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Yu", "affiliations": [ { "country": "Canada", "value": "Queen\u2019s University, Department of Physics, Engineering Physics and Astronomy, Kingston, ON K7L 3N6, Canada" }, { "country": "Canada", "value": "Laurentian University, School of Natural Sciences, 935 Ramsey Lake Road, Sudbury, ON P3E 2C6, Canada" } ], "surname": "Yu", "given_names": "S.", "full_name": "Yu, S." }, { "raw_name": "Y. Zhang", "affiliations": [ { "country": "China", "value": "Research Center for Particle Science and Technology, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, Shandong, China" }, { "country": "China", "value": "Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education, Shandong University, Qingdao 266237, Shandong, China" } ], "surname": "Zhang", "given_names": "Y.", "full_name": "Zhang, Y." }, { "raw_name": "K. Zuber", "affiliations": [ { "country": "Germany", "value": "Technische Universit\u00e4t Dresden, Institut f\u00fcr Kern und Teilchenphysik, Zellescher Weg 19, Dresden, 01069, Germany" } ], "surname": "Zuber", "given_names": "K.", "full_name": "Zuber, K." }, { "raw_name": "A. Zummo", "affiliations": [ { "country": "USA", "value": "University of Pennsylvania, Department of Physics & Astronomy, 209 South 33rd Street, Philadelphia, PA 19104-6396, USA" } ], "surname": "Zummo", "given_names": "A.", "full_name": "Zummo, A." } ], "titles": [ { "source": "APS", "title": "Event-by-event direction reconstruction of solar neutrinos in a high light-yield liquid scintillator" } ], "dois": [ { "value": "10.1103/PhysRevD.109.072002" } ], "publication_info": [ { "journal_volume": "109", "journal_title": "Physical Review D", "material": "article", "journal_issue": "7", "year": 2024 } ], "$schema": "http://repo.scoap3.org/schemas/hep.json", "acquisition_source": { "date": "2024-04-03T22:30:04.223170", "source": "APS", "method": "APS", "submission_number": "b50259b2f20911eeaf7a62370f8ccf13" }, "page_nr": [ 7 ], "license": [ { "url": "https://creativecommons.org/licenses/by/4.0/", "license": "CC-BY-4.0" } ], "copyright": [ { "statement": "Published by the American Physical Society", "year": "2024" } ], "control_number": "84471", "collaborations": [ { "value": "The <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mrow><mi>SNO</mi><mo>+</mo></mrow></math> Collaboration" } ], "_files": [ { "checksum": "md5:cf047bddc9d361d8b5705ca272fccd59", "filetype": "pdf", "bucket": "f89e24e7-5d1b-4ad4-81e9-a7b8406f1a40", "version_id": "c7329ed9-76c3-4535-a724-81345376173a", "key": "10.1103/PhysRevD.109.072002.pdf", "size": 431474 }, { "checksum": "md5:57870dd09e3c8e22cde4487fe0ad6d55", "filetype": "xml", "bucket": "f89e24e7-5d1b-4ad4-81e9-a7b8406f1a40", "version_id": "ec87192a-30a5-4f11-92ec-d64f525af799", "key": "10.1103/PhysRevD.109.072002.xml", "size": 91952 } ], "record_creation_date": "2024-04-03T14:30:03.874704", "collections": [ { "primary": "HEP" }, { "primary": "Citeable" }, { "primary": "Published" } ], "arxiv_eprints": [ { "categories": [ "hep-ex", "physics.ins-det" ], "value": "2309.06341" } ], "abstracts": [ { "source": "APS", "value": "The direction of individual <math><mrow><mmultiscripts><mrow><mi>B</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>8</mn></mrow></mmultiscripts></mrow></math> solar neutrinos has been reconstructed using the <math><mrow><mi>SNO</mi><mo>+</mo></mrow></math> liquid scintillator detector. Prompt, directional Cherenkov light was separated from the slower, isotropic scintillation light using time information, and a maximum likelihood method was used to reconstruct the direction of individual scattered electrons. A clear directional signal was observed, correlated with the solar angle. The observation was aided by a period of low primary fluor concentration that resulted in a slower scintillator decay time. This is the first time that event-by-event direction reconstruction in high light-yield liquid scintillator has been demonstrated in a large-scale detector." } ], "imprints": [ { "date": "2024-04-03", "publisher": "APS" } ] }