期刊
PHYSICS LETTERS B
卷 830, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2022.137172
关键词
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资金
- F.R.S.-FNRS (Fonds De La Recherche Scientifique -FNRS), Belgium [4.4512.10, 1.B.258.20]
- Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) [2.5020.11]
- Walloon Region, Belgium
- NSERC (Natural Sciences and Engineering Research Council), Canada [SAPPJ-2018-0017]
- MEYS (Ministry of Education, Youth and Sports), Czech Republic [LM 2018104]
- BMBF (Bundesministerium fur Bildung und Forschung), Germany [05H12UM5, 05H15UMCNA, 05H18UMCNA]
- INFN (Istituto Nazionale di Fisica Nucleare), Italy
- CONACYT(Consejo Nacional de Ciencia y Tecnologia), Mexico
- IFA (Institute of Atomic Physics) Romanian CERN-RO, Romania [1/16. 03.2016]
- Nucleus Programme, Romania [PN 19 06 01 04]
- INR-RAS (Institute for Nuclear Research of the Russian Academy of Sciences), Moscow, Russia
- JINR (Joint Institute for Nuclear Research), Dubna, Russia
- NRC (National Research Center) Kurchatov Institute, Russia
- MESRF (Ministry of Education and Science of the Russian Federation), Russia
- MESRS (Ministry of Education, Science, Research and Sport), Slovakia
- CERN (European Organization for Nuclear Research), Switzerland
- STFC (Science and Technology Facilities Council), United Kingdom
- NSF (National Science Foundation), U.S.A. [1506088, 1806430]
- ERC (European Research Council) , Europe [268062, 336581]
- Charles University Research Center, Czech Republic [UNCE/SCI/013]
- Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR Futuro in ricerca 2012 grant, Project GAP), Italy [RBFR12JF2Z]
- Russian Science Foundation, Russia [RSF 19-72-10096]
- Royal Society, United Kingdom [UF100308, UF0758946]
- STFC, United Kingdom [ST/J00412X/1, ST/M005798/1]
- ERC [268062, 336581, 802836]
- EU Horizon 2020 (Marie Sklodowska-Curie grants) [701386, 754496, 842407, 893101, 101023808]
- MIUR (Ministero dell'Istruzione, dell'Universita e della Ricerca), Italy
- Direct For Mathematical & Physical Scien
- Division Of Physics [1806430] Funding Source: National Science Foundation
- Marie Curie Actions (MSCA) [893101, 101023808, 842407] Funding Source: Marie Curie Actions (MSCA)
- European Research Council (ERC) [802836] Funding Source: European Research Council (ERC)
Searches for lepton number violating decays K+ -> pi(-)e(+)e(+) and K+ -> pi(-)pi(0)e(+)e(+) have been conducted using the complete dataset collected by the NA62 experiment at CERN from 2016 to 2018. Upper limits on the decay branching fractions have been obtained, with values of 5.3 x 10(-11) and 8.5 x 10(-10) at a 90% confidence level. The former result represents a four-fold improvement over the previous best limit, while the latter result sets the first limit on the K+ -> pi(-)pi(0)e(+)e(+) decay rate.
Searches for lepton number violating K+ -> pi(-)e(+)e(+) and K+ -> pi(-)pi(0)e(+)e(+) decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of 5.3 x 10(-11 )and 8.5 x 10(-10) are obtained on the decay branching fractions at 90% confidence level. The former result improves by a factor of four over the previous best limit, while the latter result represents the first limit on the K+ -> pi(-)pi(0)e(+)e(+) decay rate. (C) 2022 The Author. Published by Elsevier B.V.
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