A search for the K+ → μ−νe+e+ decay

The NA62 Collaboration

doi:10.1016/j.physletb.2023.137679

A search for the K⁺ → μ⁻νe⁺e⁺ decay

The NA62 Collaboration

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

9 Citations (Scopus)

Abstract

A search for the K⁺→μ⁻νe⁺e⁺ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10⁻¹¹ is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.

Original language	English
Article number	137679
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	838
DOIs	https://doi.org/10.1016/j.physletb.2023.137679
Publication status	Published - 10 Mar 2023

Bibliographical note

Funding Information:
The cost of the experiment and its auxiliary systems was supported by the funding agencies of the Collaboration Institutes. We are particularly indebted to: F.R.S.-FNRS ( Fonds De La Recherche Scientifique - FNRS ), under Grants No. 4.4512.10 , 1.B.258.20 , Belgium; CECI (Consortium des Equipements de Calcul Intensif), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11 and by the Walloon Region , Belgium; NSERC (Natural Sciences and Engineering Research Council), funding SAPPJ-2018-0017 , Canada; MEYS (Ministry of Education, Youth and Sports) funding LM 2018104 , Czech Republic; BMBF ( Bundesministerium für Bildung und Forschung ) contracts 05H12UM5 , 05H15UMCNA and 05H18UMCNA , Germany; INFN (Istituto Nazionale di Fisica Nucleare), Italy; MIUR (Ministero dell'Istruzione, dell'Università e della Ricerca), Italy; CONACyT ( Consejo Nacional de Ciencia y Tecnología ), Mexico; IFA ( Institute of Atomic Physics ) Romanian CERN-RO No. 1/16.03.2016 and Nucleus Programme PN 19 06 01 04 , Romania; 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” ) and 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 ) Award Numbers 1506088 and 1806430 , U.S.A.; ERC ( European Research Council ) “UniversaLepto” advanced grant 268062 , “KaonLepton” starting grant 336581 , Europe.

Funding Information:
Individuals have received support from: Charles University Research Center ( UNCE/SCI/013 ), Czech Republic; Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR “Futuro in ricerca 2012” grant RBFR12JF2Z , Project GAP), Italy; Russian Science Foundation ( RSF 19-72-10096 ), Russia; the Royal Society (grants UF100308 , UF0758946 ), United Kingdom; STFC (Rutherford fellowships ST/J00412X/1 , ST/M005798/1 ), United Kingdom; ERC (grants 268062 , 336581 and starting grant 802836 “AxScale” ); EU Horizon 2020 (Marie Skłodowska-Curie grants 701386 , 754496 , 842407 , 893101 , 101023808 ).

Publisher Copyright:
© 2023 The Author(s)

Keywords

Kaon decays
Lepton flavour violation
Lepton number violation

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title = "A search for the K+ → μ−νe+e+ decay",

abstract = "A search for the K+→μ−νe+e+ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10−11 is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.",

keywords = "Kaon decays, Lepton flavour violation, Lepton number violation",

author = "{The NA62 Collaboration} and {Cortina Gil}, E. and A. Kleimenova and E. Minucci and S. Padolski and A. Shaikhiev and R. Volpe and T. Numao and Y. Petrov and B. Velghe and D. Bryman and T. Husek and J. Jerhot and K. Kampf and M. Zamkovsky and R. Aliberti and G. Khoriauli and J. Kunze and D. Lomidze and L. Peruzzo and M. Vormstein and R. Wanke and P. Dalpiaz and M. Fiorini and I. Neri and A. Norton and F. Petrucci and H. Wahl and H. Heath and R. Page and S. Trilov",

note = "Funding Information: The cost of the experiment and its auxiliary systems was supported by the funding agencies of the Collaboration Institutes. We are particularly indebted to: F.R.S.-FNRS ( Fonds De La Recherche Scientifique - FNRS ), under Grants No. 4.4512.10 , 1.B.258.20 , Belgium; CECI (Consortium des Equipements de Calcul Intensif), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11 and by the Walloon Region , Belgium; NSERC (Natural Sciences and Engineering Research Council), funding SAPPJ-2018-0017 , Canada; MEYS (Ministry of Education, Youth and Sports) funding LM 2018104 , Czech Republic; BMBF ( Bundesministerium f{\"u}r Bildung und Forschung ) contracts 05H12UM5 , 05H15UMCNA and 05H18UMCNA , Germany; INFN (Istituto Nazionale di Fisica Nucleare), Italy; MIUR (Ministero dell'Istruzione, dell'Universit{\`a} e della Ricerca), Italy; CONACyT ( Consejo Nacional de Ciencia y Tecnolog{\'i}a ), Mexico; IFA ( Institute of Atomic Physics ) Romanian CERN-RO No. 1/16.03.2016 and Nucleus Programme PN 19 06 01 04 , Romania; 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” ) and 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 ) Award Numbers 1506088 and 1806430 , U.S.A.; ERC ( European Research Council ) “UniversaLepto” advanced grant 268062 , “KaonLepton” starting grant 336581 , Europe. Funding Information: Individuals have received support from: Charles University Research Center ( UNCE/SCI/013 ), Czech Republic; Ministero dell'Istruzione, dell'Universit{\`a} e della Ricerca (MIUR “Futuro in ricerca 2012” grant RBFR12JF2Z , Project GAP), Italy; Russian Science Foundation ( RSF 19-72-10096 ), Russia; the Royal Society (grants UF100308 , UF0758946 ), United Kingdom; STFC (Rutherford fellowships ST/J00412X/1 , ST/M005798/1 ), United Kingdom; ERC (grants 268062 , 336581 and starting grant 802836 “AxScale” ); EU Horizon 2020 (Marie Sk{\l}odowska-Curie grants 701386 , 754496 , 842407 , 893101 , 101023808 ). Publisher Copyright: {\textcopyright} 2023 The Author(s)",

year = "2023",

month = mar,

day = "10",

doi = "10.1016/j.physletb.2023.137679",

language = "English",

volume = "838",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "North-Holland Publishing Company",

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TY - JOUR

T1 - A search for the K+ → μ−νe+e+ decay

AU - The NA62 Collaboration

AU - Cortina Gil, E.

AU - Kleimenova, A.

AU - Minucci, E.

AU - Padolski, S.

AU - Shaikhiev, A.

AU - Volpe, R.

AU - Numao, T.

AU - Petrov, Y.

AU - Velghe, B.

AU - Bryman, D.

AU - Husek, T.

AU - Jerhot, J.

AU - Kampf, K.

AU - Zamkovsky, M.

AU - Aliberti, R.

AU - Khoriauli, G.

AU - Kunze, J.

AU - Lomidze, D.

AU - Peruzzo, L.

AU - Vormstein, M.

AU - Wanke, R.

AU - Dalpiaz, P.

AU - Fiorini, M.

AU - Neri, I.

AU - Norton, A.

AU - Petrucci, F.

AU - Wahl, H.

AU - Heath, H.

AU - Page, R.

AU - Trilov, S.

N1 - Funding Information: The cost of the experiment and its auxiliary systems was supported by the funding agencies of the Collaboration Institutes. We are particularly indebted to: F.R.S.-FNRS ( Fonds De La Recherche Scientifique - FNRS ), under Grants No. 4.4512.10 , 1.B.258.20 , Belgium; CECI (Consortium des Equipements de Calcul Intensif), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11 and by the Walloon Region , Belgium; NSERC (Natural Sciences and Engineering Research Council), funding SAPPJ-2018-0017 , Canada; MEYS (Ministry of Education, Youth and Sports) funding LM 2018104 , Czech Republic; BMBF ( Bundesministerium für Bildung und Forschung ) contracts 05H12UM5 , 05H15UMCNA and 05H18UMCNA , Germany; INFN (Istituto Nazionale di Fisica Nucleare), Italy; MIUR (Ministero dell'Istruzione, dell'Università e della Ricerca), Italy; CONACyT ( Consejo Nacional de Ciencia y Tecnología ), Mexico; IFA ( Institute of Atomic Physics ) Romanian CERN-RO No. 1/16.03.2016 and Nucleus Programme PN 19 06 01 04 , Romania; 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” ) and 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 ) Award Numbers 1506088 and 1806430 , U.S.A.; ERC ( European Research Council ) “UniversaLepto” advanced grant 268062 , “KaonLepton” starting grant 336581 , Europe. Funding Information: Individuals have received support from: Charles University Research Center ( UNCE/SCI/013 ), Czech Republic; Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR “Futuro in ricerca 2012” grant RBFR12JF2Z , Project GAP), Italy; Russian Science Foundation ( RSF 19-72-10096 ), Russia; the Royal Society (grants UF100308 , UF0758946 ), United Kingdom; STFC (Rutherford fellowships ST/J00412X/1 , ST/M005798/1 ), United Kingdom; ERC (grants 268062 , 336581 and starting grant 802836 “AxScale” ); EU Horizon 2020 (Marie Skłodowska-Curie grants 701386 , 754496 , 842407 , 893101 , 101023808 ). Publisher Copyright: © 2023 The Author(s)

PY - 2023/3/10

Y1 - 2023/3/10

N2 - A search for the K+→μ−νe+e+ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10−11 is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.

AB - A search for the K+→μ−νe+e+ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10−11 is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.

KW - Kaon decays

KW - Lepton flavour violation

KW - Lepton number violation

UR - http://www.scopus.com/inward/record.url?scp=85146583658&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2023.137679

DO - 10.1016/j.physletb.2023.137679

M3 - Article (Academic Journal)

AN - SCOPUS:85146583658

SN - 0370-2693

VL - 838

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 137679

ER -

A search for the K⁺ → μ⁻νe⁺e⁺ decay

Abstract

Bibliographical note

Keywords

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A search for the K+ → μ−νe+e+ decay

Abstract

Bibliographical note

Keywords

Access to Document

Handle.net

Other files and links

Fingerprint

Cite this

A search for the K⁺ → μ⁻νe⁺e⁺ decay