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用KM3NeT/ORCA的前六个探测单元探测不可见中微子衰变

IF 5.4 1区 物理与天体物理 Q1 Physics and Astronomy
Journal of High Energy Physics Pub Date : 2025-04-15 DOI:10.1007/JHEP04(2025)105
The KM3NeT collaboration, S. Aiello, A. Albert, A. R. Alhebsi, M. Alshamsi, S. Alves Garre, A. Ambrosone, F. Ameli, M. Andre, L. Aphecetche, M. Ardid, S. Ardid, J. Aublin, F. Badaracco, L. Bailly-Salins, Z. Bardačová, B. Baret, A. Bariego-Quintana, Y. Becherini, M. Bendahman, F. Benfenati Gualandi, M. Benhassi, M. Bennani, D. M. Benoit, E. Berbee, V. Bertin, S. Biagi, M. Boettcher, D. Bonanno, A. B. Bouasla, J. Boumaaza, M. Bouta, M. Bouwhuis, C. Bozza, R. M. Bozza, H. Brânzaş, F. Bretaudeau, M. Breuhaus, R. Bruijn, J. Brunner, R. Bruno, E. Buis, R. Buompane, J. Busto, B. Caiffi, D. Calvo, A. Capone, F. Carenini, V. Carretero, T. Cartraud, P. Castaldi, V. Cecchini, S. Celli, L. Cerisy, M. Chabab, A. Chen, S. Cherubini, T. Chiarusi, M. Circella, R. Clark, R. Cocimano, J. A. B. Coelho, A. Coleiro, A. Condorelli, R. Coniglione, P. Coyle, A. Creusot, G. Cuttone, R. Dallier, A. De Benedittis, G. De Wasseige, V. Decoene, P. Deguire, I. Del Rosso, L. S. Di Mauro, I. Di Palma, A. F. Díaz, D. Diego-Tortosa, C. Distefano, A. Domi, C. Donzaud, D. Dornic, E. Drakopoulou, D. Drouhin, J.-G. Ducoin, P. Duverne, R. Dvornický, T. Eberl, E. Eckerová, A. Eddymaoui, T. van Eeden, M. Eff, D. van Eijk, I. El Bojaddaini, S. El Hedri, S. El Mentawi, V. Ellajosyula, A. Enzenhöfer, G. Ferrara, M. D. Filipović, F. Filippini, D. Franciotti, L. A. Fusco, S. Gagliardini, T. Gal, J. García Méndez, A. Garcia Soto, C. Gatius Oliver, N. Geißelbrecht, E. Genton, H. Ghaddari, L. Gialanella, B. K. Gibson, E. Giorgio, I. Goos, P. Goswami, S. R. Gozzini, R. Gracia, C. Guidi, B. Guillon, M. Gutiérrez, C. Haack, H. van Haren, A. Heijboer, L. Hennig, J. J. Hernández-Rey, A. Idrissi, W. Idrissi Ibnsalih, G. Illuminati, D. Joly, M. de Jong, P. de Jong, B. J. Jung, P. Kalaczyński, V. Kikvadze, G. Kistauri, C. Kopper, A. Kouchner, Y. Y. Kovalev, L. Krupa, V. Kueviakoe, V. Kulikovskiy, R. Kvatadze, M. Labalme, R. Lahmann, M. Lamoureux, G. Larosa, C. Lastoria, J. Lazar, A. Lazo, S. Le Stum, G. Lehaut, V. Lemaître, E. Leonora, N. Lessing, G. Levi, M. Lindsey Clark, F. Longhitano, F. Magnani, J. Majumdar, L. Malerba, F. Mamedov, A. Manfreda, A. Manousakis, M. Marconi, A. Margiotta, A. Marinelli, C. Markou, L. Martin, M. Mastrodicasa, S. Mastroianni, J. Mauro, K. C. K. Mehta, A. Meskar, G. Miele, P. Migliozzi, E. Migneco, M. L. Mitsou, C. M. Mollo, L. Morales-Gallegos, A. Moussa, I. Mozun Mateo, R. Muller, M. R. Musone, M. Musumeci, S. Navas, A. Nayerhoda, C. A. Nicolau, B. Nkosi, B. Ó Fearraigh, V. Oliviero, A. Orlando, E. Oukacha, D. Paesani, J. Palacios González, G. Papalashvili, V. Parisi, A. Parmar, E. J. Pastor Gomez, C. Pastore, A. M. Păun, G. E. Păvălaş, S. Peña Martínez, M. Perrin-Terrin, V. Pestel, R. Pestes, P. Piattelli, A. Plavin, C. Poirè, V. Popa, T. Pradier, J. Prado, S. Pulvirenti, C. A. Quiroz-Rangel, N. Randazzo, A. Ratnani, S. Razzaque, I. C. Rea, D. Real, G. Riccobene, A. Romanov, E. Ros, A. Šaina, F. Salesa Greus, D. F. E. Samtleben, A. Sánchez Losa, S. Sanfilippo, M. Sanguineti, D. Santonocito, P. Sapienza, M. Scarnera, J. Schnabel, J. Schumann, H. M. Schutte, J. Seneca, N. Sennan, P. Sevle, I. Sgura, R. Shanidze, A. Sharma, Y. Shitov, F. Šimkovic, A. Simonelli, A. Sinopoulou, B. Spisso, M. Spurio, D. Stavropoulos, I. Štekl, M. Taiuti, G. Takadze, Y. Tayalati, H. Thiersen, S. Thoudam, I. Tosta,  Melo, B. Trocmé, V. Tsourapis, A. Tudorache, E. Tzamariudaki, A. Ukleja, A. Vacheret, V. Valsecchi, V. Van Elewyck, G. Vannoye, G. Vasileiadis, F. Vazquez de Sola, A. Veutro, S. Viola, D. Vivolo, A. van Vliet, E. de Wolf, I. Lhenry-Yvon, S. Zavatarelli, A. Zegarelli, D. Zito, J. D. Zornoza, J. Zúñiga, N. Zywucka
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Celli,&nbsp;L. Cerisy,&nbsp;M. Chabab,&nbsp;A. Chen,&nbsp;S. Cherubini,&nbsp;T. Chiarusi,&nbsp;M. Circella,&nbsp;R. Clark,&nbsp;R. Cocimano,&nbsp;J. A. B. Coelho,&nbsp;A. Coleiro,&nbsp;A. Condorelli,&nbsp;R. Coniglione,&nbsp;P. Coyle,&nbsp;A. Creusot,&nbsp;G. Cuttone,&nbsp;R. Dallier,&nbsp;A. De Benedittis,&nbsp;G. De Wasseige,&nbsp;V. Decoene,&nbsp;P. Deguire,&nbsp;I. Del Rosso,&nbsp;L. S. Di Mauro,&nbsp;I. Di Palma,&nbsp;A. F. Díaz,&nbsp;D. Diego-Tortosa,&nbsp;C. Distefano,&nbsp;A. Domi,&nbsp;C. Donzaud,&nbsp;D. Dornic,&nbsp;E. Drakopoulou,&nbsp;D. Drouhin,&nbsp;J.-G. Ducoin,&nbsp;P. Duverne,&nbsp;R. Dvornický,&nbsp;T. Eberl,&nbsp;E. Eckerová,&nbsp;A. Eddymaoui,&nbsp;T. van Eeden,&nbsp;M. Eff,&nbsp;D. van Eijk,&nbsp;I. El Bojaddaini,&nbsp;S. El Hedri,&nbsp;S. El Mentawi,&nbsp;V. Ellajosyula,&nbsp;A. Enzenhöfer,&nbsp;G. Ferrara,&nbsp;M. D. Filipović,&nbsp;F. Filippini,&nbsp;D. Franciotti,&nbsp;L. A. Fusco,&nbsp;S. Gagliardini,&nbsp;T. Gal,&nbsp;J. García Méndez,&nbsp;A. Garcia Soto,&nbsp;C. Gatius Oliver,&nbsp;N. Geißelbrecht,&nbsp;E. Genton,&nbsp;H. Ghaddari,&nbsp;L. Gialanella,&nbsp;B. K. Gibson,&nbsp;E. Giorgio,&nbsp;I. Goos,&nbsp;P. Goswami,&nbsp;S. R. Gozzini,&nbsp;R. Gracia,&nbsp;C. Guidi,&nbsp;B. Guillon,&nbsp;M. Gutiérrez,&nbsp;C. Haack,&nbsp;H. van Haren,&nbsp;A. Heijboer,&nbsp;L. Hennig,&nbsp;J. J. Hernández-Rey,&nbsp;A. Idrissi,&nbsp;W. Idrissi Ibnsalih,&nbsp;G. Illuminati,&nbsp;D. Joly,&nbsp;M. de Jong,&nbsp;P. de Jong,&nbsp;B. J. Jung,&nbsp;P. Kalaczyński,&nbsp;V. Kikvadze,&nbsp;G. Kistauri,&nbsp;C. Kopper,&nbsp;A. Kouchner,&nbsp;Y. Y. Kovalev,&nbsp;L. Krupa,&nbsp;V. Kueviakoe,&nbsp;V. Kulikovskiy,&nbsp;R. Kvatadze,&nbsp;M. Labalme,&nbsp;R. Lahmann,&nbsp;M. Lamoureux,&nbsp;G. Larosa,&nbsp;C. Lastoria,&nbsp;J. Lazar,&nbsp;A. Lazo,&nbsp;S. Le Stum,&nbsp;G. Lehaut,&nbsp;V. Lemaître,&nbsp;E. Leonora,&nbsp;N. Lessing,&nbsp;G. Levi,&nbsp;M. Lindsey Clark,&nbsp;F. Longhitano,&nbsp;F. Magnani,&nbsp;J. Majumdar,&nbsp;L. Malerba,&nbsp;F. Mamedov,&nbsp;A. Manfreda,&nbsp;A. Manousakis,&nbsp;M. Marconi,&nbsp;A. Margiotta,&nbsp;A. Marinelli,&nbsp;C. Markou,&nbsp;L. Martin,&nbsp;M. Mastrodicasa,&nbsp;S. Mastroianni,&nbsp;J. Mauro,&nbsp;K. C. K. Mehta,&nbsp;A. Meskar,&nbsp;G. Miele,&nbsp;P. Migliozzi,&nbsp;E. Migneco,&nbsp;M. L. Mitsou,&nbsp;C. M. Mollo,&nbsp;L. Morales-Gallegos,&nbsp;A. Moussa,&nbsp;I. Mozun Mateo,&nbsp;R. Muller,&nbsp;M. R. Musone,&nbsp;M. Musumeci,&nbsp;S. Navas,&nbsp;A. Nayerhoda,&nbsp;C. A. Nicolau,&nbsp;B. Nkosi,&nbsp;B. Ó Fearraigh,&nbsp;V. Oliviero,&nbsp;A. Orlando,&nbsp;E. Oukacha,&nbsp;D. Paesani,&nbsp;J. Palacios González,&nbsp;G. Papalashvili,&nbsp;V. Parisi,&nbsp;A. Parmar,&nbsp;E. J. Pastor Gomez,&nbsp;C. Pastore,&nbsp;A. M. Păun,&nbsp;G. E. Păvălaş,&nbsp;S. Peña Martínez,&nbsp;M. Perrin-Terrin,&nbsp;V. Pestel,&nbsp;R. Pestes,&nbsp;P. Piattelli,&nbsp;A. Plavin,&nbsp;C. Poirè,&nbsp;V. Popa,&nbsp;T. Pradier,&nbsp;J. Prado,&nbsp;S. Pulvirenti,&nbsp;C. A. Quiroz-Rangel,&nbsp;N. Randazzo,&nbsp;A. 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Lhenry-Yvon,&nbsp;S. Zavatarelli,&nbsp;A. Zegarelli,&nbsp;D. Zito,&nbsp;J. D. Zornoza,&nbsp;J. Zúñiga,&nbsp;N. Zywucka","doi":"10.1007/JHEP04(2025)105","DOIUrl":null,"url":null,"abstract":"<p>In the era of precision measurements of neutrino oscillation parameters, it is necessary for experiments to disentangle discrepancies that may indicate physics beyond the Standard Model in the neutrino sector. KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study the oscillations of atmospheric neutrinos and determine the neutrino mass ordering. This paper focuses on the initial configuration of ORCA, referred to as ORCA6, which comprises six out of the foreseen 115 detection units of photosensors. A high-purity neutrino sample was extracted during 2020 and 2021, corresponding to an exposure of 433 kton-years. This sample is analysed following a binned log-likelihood approach to search for invisible neutrino decay, in a three-flavour neutrino oscillation scenario, where the third neutrino mass state <i>ν</i><sub>3</sub> decays into an invisible state, e.g. a sterile neutrino. The resulting best fit of the invisible neutrino decay parameter is <span>\\( {\\alpha}_3={0.92}_{-0.57}^{+1.08}\\times {10}^{-4} \\)</span> eV<sup>2</sup>, corresponding to a scenario with <i>θ</i><sub>23</sub> in the second octant and normal neutrino mass ordering. 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Benoit,&nbsp;E. Berbee,&nbsp;V. Bertin,&nbsp;S. Biagi,&nbsp;M. Boettcher,&nbsp;D. Bonanno,&nbsp;A. B. Bouasla,&nbsp;J. Boumaaza,&nbsp;M. Bouta,&nbsp;M. Bouwhuis,&nbsp;C. Bozza,&nbsp;R. M. Bozza,&nbsp;H. Brânzaş,&nbsp;F. Bretaudeau,&nbsp;M. Breuhaus,&nbsp;R. Bruijn,&nbsp;J. Brunner,&nbsp;R. Bruno,&nbsp;E. Buis,&nbsp;R. Buompane,&nbsp;J. Busto,&nbsp;B. Caiffi,&nbsp;D. Calvo,&nbsp;A. Capone,&nbsp;F. Carenini,&nbsp;V. Carretero,&nbsp;T. Cartraud,&nbsp;P. Castaldi,&nbsp;V. Cecchini,&nbsp;S. Celli,&nbsp;L. Cerisy,&nbsp;M. Chabab,&nbsp;A. Chen,&nbsp;S. Cherubini,&nbsp;T. Chiarusi,&nbsp;M. Circella,&nbsp;R. Clark,&nbsp;R. Cocimano,&nbsp;J. A. B. Coelho,&nbsp;A. Coleiro,&nbsp;A. Condorelli,&nbsp;R. Coniglione,&nbsp;P. Coyle,&nbsp;A. Creusot,&nbsp;G. Cuttone,&nbsp;R. Dallier,&nbsp;A. De Benedittis,&nbsp;G. De Wasseige,&nbsp;V. Decoene,&nbsp;P. Deguire,&nbsp;I. Del Rosso,&nbsp;L. S. Di Mauro,&nbsp;I. Di Palma,&nbsp;A. F. Díaz,&nbsp;D. Diego-Tortosa,&nbsp;C. Distefano,&nbsp;A. Domi,&nbsp;C. Donzaud,&nbsp;D. Dornic,&nbsp;E. Drakopoulou,&nbsp;D. Drouhin,&nbsp;J.-G. Ducoin,&nbsp;P. Duverne,&nbsp;R. Dvornický,&nbsp;T. Eberl,&nbsp;E. Eckerová,&nbsp;A. Eddymaoui,&nbsp;T. van Eeden,&nbsp;M. Eff,&nbsp;D. van Eijk,&nbsp;I. El Bojaddaini,&nbsp;S. El Hedri,&nbsp;S. El Mentawi,&nbsp;V. Ellajosyula,&nbsp;A. Enzenhöfer,&nbsp;G. Ferrara,&nbsp;M. D. Filipović,&nbsp;F. Filippini,&nbsp;D. Franciotti,&nbsp;L. A. Fusco,&nbsp;S. Gagliardini,&nbsp;T. Gal,&nbsp;J. García Méndez,&nbsp;A. Garcia Soto,&nbsp;C. Gatius Oliver,&nbsp;N. Geißelbrecht,&nbsp;E. Genton,&nbsp;H. Ghaddari,&nbsp;L. Gialanella,&nbsp;B. K. Gibson,&nbsp;E. Giorgio,&nbsp;I. Goos,&nbsp;P. Goswami,&nbsp;S. R. Gozzini,&nbsp;R. Gracia,&nbsp;C. Guidi,&nbsp;B. Guillon,&nbsp;M. Gutiérrez,&nbsp;C. Haack,&nbsp;H. van Haren,&nbsp;A. Heijboer,&nbsp;L. Hennig,&nbsp;J. J. Hernández-Rey,&nbsp;A. Idrissi,&nbsp;W. Idrissi Ibnsalih,&nbsp;G. Illuminati,&nbsp;D. Joly,&nbsp;M. de Jong,&nbsp;P. de Jong,&nbsp;B. J. Jung,&nbsp;P. Kalaczyński,&nbsp;V. Kikvadze,&nbsp;G. Kistauri,&nbsp;C. Kopper,&nbsp;A. Kouchner,&nbsp;Y. Y. Kovalev,&nbsp;L. Krupa,&nbsp;V. Kueviakoe,&nbsp;V. Kulikovskiy,&nbsp;R. Kvatadze,&nbsp;M. Labalme,&nbsp;R. Lahmann,&nbsp;M. Lamoureux,&nbsp;G. Larosa,&nbsp;C. Lastoria,&nbsp;J. Lazar,&nbsp;A. Lazo,&nbsp;S. Le Stum,&nbsp;G. Lehaut,&nbsp;V. Lemaître,&nbsp;E. Leonora,&nbsp;N. Lessing,&nbsp;G. Levi,&nbsp;M. Lindsey Clark,&nbsp;F. Longhitano,&nbsp;F. Magnani,&nbsp;J. Majumdar,&nbsp;L. Malerba,&nbsp;F. Mamedov,&nbsp;A. Manfreda,&nbsp;A. Manousakis,&nbsp;M. Marconi,&nbsp;A. Margiotta,&nbsp;A. Marinelli,&nbsp;C. Markou,&nbsp;L. Martin,&nbsp;M. Mastrodicasa,&nbsp;S. Mastroianni,&nbsp;J. Mauro,&nbsp;K. C. K. Mehta,&nbsp;A. Meskar,&nbsp;G. Miele,&nbsp;P. Migliozzi,&nbsp;E. Migneco,&nbsp;M. L. Mitsou,&nbsp;C. M. Mollo,&nbsp;L. Morales-Gallegos,&nbsp;A. Moussa,&nbsp;I. Mozun Mateo,&nbsp;R. Muller,&nbsp;M. R. Musone,&nbsp;M. Musumeci,&nbsp;S. Navas,&nbsp;A. Nayerhoda,&nbsp;C. A. Nicolau,&nbsp;B. Nkosi,&nbsp;B. Ó Fearraigh,&nbsp;V. Oliviero,&nbsp;A. Orlando,&nbsp;E. Oukacha,&nbsp;D. Paesani,&nbsp;J. Palacios González,&nbsp;G. Papalashvili,&nbsp;V. Parisi,&nbsp;A. Parmar,&nbsp;E. J. Pastor Gomez,&nbsp;C. Pastore,&nbsp;A. M. Păun,&nbsp;G. E. Păvălaş,&nbsp;S. Peña Martínez,&nbsp;M. Perrin-Terrin,&nbsp;V. Pestel,&nbsp;R. Pestes,&nbsp;P. Piattelli,&nbsp;A. Plavin,&nbsp;C. Poirè,&nbsp;V. Popa,&nbsp;T. Pradier,&nbsp;J. Prado,&nbsp;S. Pulvirenti,&nbsp;C. A. Quiroz-Rangel,&nbsp;N. Randazzo,&nbsp;A. Ratnani,&nbsp;S. Razzaque,&nbsp;I. C. Rea,&nbsp;D. Real,&nbsp;G. Riccobene,&nbsp;A. Romanov,&nbsp;E. Ros,&nbsp;A. Šaina,&nbsp;F. Salesa Greus,&nbsp;D. F. E. Samtleben,&nbsp;A. Sánchez Losa,&nbsp;S. Sanfilippo,&nbsp;M. Sanguineti,&nbsp;D. Santonocito,&nbsp;P. Sapienza,&nbsp;M. Scarnera,&nbsp;J. Schnabel,&nbsp;J. Schumann,&nbsp;H. M. Schutte,&nbsp;J. Seneca,&nbsp;N. Sennan,&nbsp;P. Sevle,&nbsp;I. Sgura,&nbsp;R. Shanidze,&nbsp;A. Sharma,&nbsp;Y. Shitov,&nbsp;F. Šimkovic,&nbsp;A. Simonelli,&nbsp;A. Sinopoulou,&nbsp;B. Spisso,&nbsp;M. Spurio,&nbsp;D. Stavropoulos,&nbsp;I. Štekl,&nbsp;M. Taiuti,&nbsp;G. Takadze,&nbsp;Y. Tayalati,&nbsp;H. Thiersen,&nbsp;S. Thoudam,&nbsp;I. Tosta,&nbsp; Melo,&nbsp;B. Trocmé,&nbsp;V. Tsourapis,&nbsp;A. Tudorache,&nbsp;E. Tzamariudaki,&nbsp;A. Ukleja,&nbsp;A. Vacheret,&nbsp;V. Valsecchi,&nbsp;V. Van Elewyck,&nbsp;G. Vannoye,&nbsp;G. Vasileiadis,&nbsp;F. Vazquez de Sola,&nbsp;A. Veutro,&nbsp;S. Viola,&nbsp;D. Vivolo,&nbsp;A. van Vliet,&nbsp;E. de Wolf,&nbsp;I. Lhenry-Yvon,&nbsp;S. Zavatarelli,&nbsp;A. Zegarelli,&nbsp;D. Zito,&nbsp;J. D. Zornoza,&nbsp;J. Zúñiga,&nbsp;N. Zywucka\",\"doi\":\"10.1007/JHEP04(2025)105\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In the era of precision measurements of neutrino oscillation parameters, it is necessary for experiments to disentangle discrepancies that may indicate physics beyond the Standard Model in the neutrino sector. KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study the oscillations of atmospheric neutrinos and determine the neutrino mass ordering. This paper focuses on the initial configuration of ORCA, referred to as ORCA6, which comprises six out of the foreseen 115 detection units of photosensors. A high-purity neutrino sample was extracted during 2020 and 2021, corresponding to an exposure of 433 kton-years. This sample is analysed following a binned log-likelihood approach to search for invisible neutrino decay, in a three-flavour neutrino oscillation scenario, where the third neutrino mass state <i>ν</i><sub>3</sub> decays into an invisible state, e.g. a sterile neutrino. 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The results are consistent with the Standard Model, within a 2.1 <i>σ</i> interval.</p>\",\"PeriodicalId\":635,\"journal\":{\"name\":\"Journal of High Energy Physics\",\"volume\":\"2025 4\",\"pages\":\"\"},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2025-04-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)105.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of High Energy Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/JHEP04(2025)105\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Physics and Astronomy\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of High Energy Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/JHEP04(2025)105","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}
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摘要

在精确测量中微子振荡参数的时代，有必要通过实验来解开可能表明中微子领域中超出标准模型的物理差异。KM3NeT/ORCA是一个正在建造的水切伦科夫中微子探测器，锚定在地中海底部。该探测器设计用于研究大气中微子的振荡和确定中微子的质量顺序。本文重点研究ORCA的初始配置，称为ORCA6，它由预计的115个光电传感器检测单元中的6个组成。在2020年和2021年期间提取了一个高纯度的中微子样本，对应于433千吨年的暴露。在三味中微子振荡的情况下，这个样本是按照一种分箱对数似然方法来寻找不可见的中微子衰变的，在这种情况下，第三个中微子质量态ν3衰变为一种不可见的状态，例如无菌中微子。所得的不可见中微子衰变参数的最佳拟合值为\( {\alpha}_3={0.92}_{-0.57}^{+1.08}\times {10}^{-4} \) eV2，对应于θ23在第二八象限和正常中微子质量排序的情况。结果与标准模型一致，在2.1 σ区间内。
本文章由计算机程序翻译，如有差异，请以英文原文为准。
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Probing invisible neutrino decay with the first six detection units of KM3NeT/ORCA

In the era of precision measurements of neutrino oscillation parameters, it is necessary for experiments to disentangle discrepancies that may indicate physics beyond the Standard Model in the neutrino sector. KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study the oscillations of atmospheric neutrinos and determine the neutrino mass ordering. This paper focuses on the initial configuration of ORCA, referred to as ORCA6, which comprises six out of the foreseen 115 detection units of photosensors. A high-purity neutrino sample was extracted during 2020 and 2021, corresponding to an exposure of 433 kton-years. This sample is analysed following a binned log-likelihood approach to search for invisible neutrino decay, in a three-flavour neutrino oscillation scenario, where the third neutrino mass state ν3 decays into an invisible state, e.g. a sterile neutrino. The resulting best fit of the invisible neutrino decay parameter is \( {\alpha}_3={0.92}_{-0.57}^{+1.08}\times {10}^{-4} \) eV2, corresponding to a scenario with θ23 in the second octant and normal neutrino mass ordering. The results are consistent with the Standard Model, within a 2.1 σ interval.

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来源期刊
Journal of High Energy Physics
Journal of High Energy Physics 物理-物理：粒子与场物理
CiteScore
10.30
自引率
46.30%
发文量
2107
审稿时长
1.5 months
期刊介绍： The aim of the Journal of High Energy Physics (JHEP) is to ensure fast and efficient online publication tools to the scientific community, while keeping that community in charge of every aspect of the peer-review and publication process in order to ensure the highest quality standards in the journal. Consequently, the Advisory and Editorial Boards, composed of distinguished, active scientists in the field, jointly establish with the Scientific Director the journal''s scientific policy and ensure the scientific quality of accepted articles. JHEP presently encompasses the following areas of theoretical and experimental physics: Collider Physics Underground and Large Array Physics Quantum Field Theory Gauge Field Theories Symmetries String and Brane Theory General Relativity and Gravitation Supersymmetry Mathematical Methods of Physics Mostly Solvable Models Astroparticles Statistical Field Theories Mostly Weak Interactions Mostly Strong Interactions Quantum Field Theory (phenomenology) Strings and Branes Phenomenological Aspects of Supersymmetry Mostly Strong Interactions (phenomenology).
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