First search for K+ → π0πμe decays

The NA62 Collaboration

doi:10.1016/j.physletb.2024.139122

First search for K⁺ → π⁰πμe decays

The NA62 Collaboration

University of Louvain
Syracuse University
Lancaster University
INFN Sezione di Perugia
TRIUMF
University of British Columbia
Charles University
University of Birmingham
Max-Planck-Institut für Physik
European Organization for Nuclear Research
Aix-Marseille Université
Technical University of Munich
Johannes Gutenberg University
University of Würzburg
European XFEL GmbH
Sezione INFN di Ferrara
University of Glasgow
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
University of Liverpool
University of Modena and Reggio Emilia
LNF-INFN
Sofia University St. Kliment Ohridski
INFN Sezione di Napoli
Scuola Superiore Meridionale
Universidad Autónoma de San Luis Potosi
Goethe University Frankfurt am Main
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Sezione di Roma
Scuola Normale Superiore di Pisa
University of Rome
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
INFN Sezione di Torino
Laboratory of Molecular Pathology
Gran Sasso Science Institute
Universidad de Guanajuato
Horia Hulubei National Institute of Physics and Nuclear Engineering
Comenius University
c/o DESY
rookhaven National Laboratory
ENAC-IIC-GEL
University of Warwick
Columbia University
Sezione di Genova
University of Bristol
George Mason University
Stanford Linear Accelerator Center
L.N. Gumilyov Eurasian National University
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

The first search for the lepton number violating decay K⁺→π⁰π⁻μ⁺e⁺ and lepton flavour violating decays K⁺→π⁰π⁺μ⁻e⁺, K⁺→π⁰π⁺μ⁺e⁻ has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 2.9×10⁻¹⁰, 3.1×10⁻¹⁰ and 5.0×10⁻¹⁰, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions.

Original language	English
Article number	139122
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	859
DOIs	https://doi.org/10.1016/j.physletb.2024.139122
Publication status	Published - 1 Dec 2024

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10.1016/j.physletb.2024.139122

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@article{b830df848c4249e29f32fece48478ca3,

title = "First search for K+ → π0πμe decays",

abstract = "The first search for the lepton number violating decay K+→π0π−μ+e+ and lepton flavour violating decays K+→π0π+μ−e+, K+→π0π+μ+e− has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 2.9×10−10, 3.1×10−10 and 5.0×10−10, respectively, are obtained at 90\% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions.",

author = "\{The NA62 Collaboration\} and Ashraf, \{M. U.\} and \{Cortina Gil\}, E. and E. Minucci and S. Padolski and P. Petrov and A. Shaikhiev and R. Volpe and T. Numao and Y. Petrov and B. Velghe and Wong, \{V. W.S.\} and D. Bryman and J. Fu and Z. Hives and T. Husek and J. Jerhot and K. Kampf and M. Kolesar and M. Zamkovsky and \{De Martino\}, B. and M. Perrin-Terrin and B. D{\"o}brich and S. Lezki and J. Schubert and Akmete, \{A. T.\} 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 M. Soldani and H. Wahl and L. Bandiera and \{Cotta Ramusino\}, A. and A. Gianoli and M. Romagnoni and A. Sytov and E. Iacopini and G. Latino and M. Lenti and \{Lo Chiatto\}, P. and I. Panichi and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2024 CERN for the benefit of the NA62 Collaboration",

year = "2024",

month = dec,

day = "1",

doi = "10.1016/j.physletb.2024.139122",

language = "English",

volume = "859",

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

issn = "0370-2693",

}

TY - JOUR

T1 - First search for K+ → π0πμe decays

AU - The NA62 Collaboration

AU - Ashraf, M. U.

AU - Cortina Gil, E.

AU - Minucci, E.

AU - Padolski, S.

AU - Petrov, P.

AU - Shaikhiev, A.

AU - Volpe, R.

AU - Numao, T.

AU - Petrov, Y.

AU - Velghe, B.

AU - Wong, V. W.S.

AU - Bryman, D.

AU - Fu, J.

AU - Hives, Z.

AU - Husek, T.

AU - Jerhot, J.

AU - Kampf, K.

AU - Kolesar, M.

AU - Zamkovsky, M.

AU - De Martino, B.

AU - Perrin-Terrin, M.

AU - Döbrich, B.

AU - Lezki, S.

AU - Schubert, J.

AU - Akmete, A. T.

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 - Soldani, M.

AU - Wahl, H.

AU - Bandiera, L.

AU - Cotta Ramusino, A.

AU - Gianoli, A.

AU - Romagnoni, M.

AU - Sytov, A.

AU - Iacopini, E.

AU - Latino, G.

AU - Lenti, M.

AU - Lo Chiatto, P.

AU - Panichi, I.

AU - Maurice, E.

PY - 2024/12/1

Y1 - 2024/12/1

N2 - The first search for the lepton number violating decay K+→π0π−μ+e+ and lepton flavour violating decays K+→π0π+μ−e+, K+→π0π+μ+e− has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 2.9×10−10, 3.1×10−10 and 5.0×10−10, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions.

AB - The first search for the lepton number violating decay K+→π0π−μ+e+ and lepton flavour violating decays K+→π0π+μ−e+, K+→π0π+μ+e− has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 2.9×10−10, 3.1×10−10 and 5.0×10−10, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions.

U2 - 10.1016/j.physletb.2024.139122

DO - 10.1016/j.physletb.2024.139122

M3 - Article

AN - SCOPUS:85209154326

SN - 0370-2693

VL - 859

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 - 139122

ER -

First search for K+ → π0πμe decays

Abstract

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First search for K⁺ → π⁰πμe decays