First search for K+→π0πμe decays

NA62 Collaboration

doi:10.1016/j.physletb.2024.139122

First search for K⁺→π⁰πμe decays

NA62 Collaboration

Physics and Astronomy

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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
Number of pages	9
Journal	Physics Letters B
Volume	859
Early online date	12 Nov 2024
DOIs	https://doi.org/10.1016/j.physletb.2024.139122
Publication status	Published - Dec 2024

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10.1016/j.physletb.2024.139122Licence: Creative Commons: Attribution (CC BY)

AshrafM2024FirstFinal published version, 1.71 MBLicence: Creative Commons: Attribution (CC BY)

KaonToALP - Search for axion-like particle production in kaon decays at CERN-NA62 experiment
Goudzovski, E. (Principal Investigator)
European Commission
4/05/21 → 11/07/23
Project: EU
H2020_IF_NEWLIGHTSCALAR
Goudzovski, E. (Principal Investigator)
European Commission
3/07/17 → 2/07/19
Project: EU
FP7_ERC_KaonLepton
Lazzeroni, C. (Co-Investigator) & Goudzovski, E. (Principal Investigator)
European Commission, European Commission - Management Costs
1/01/14 → 30/06/19
Project: Research
Ernest Rutherford Fellowship : Dr Antonio Sergi - Development of the NA62 Detector and Search for New Physics with Kaon Decays
Sergi, A. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
25/03/13 → 24/03/18
Project: Research Councils
FP7 ERC - UniversaLepto : Test of Lepton Flavour Universality with Kaon Decays
Lazzeroni, C. (Principal Investigator)
European Commission - Management Costs, European Commission
1/09/11 → 31/08/16
Project: Research

Cite this

@article{76899c6156e844608943cb8935dc6d66,

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 = "\{NA62 Collaboration\} and E. Goudzovski and C. Kenworthy and C. Lazzeroni and A. Romano and J. Sanders and A. Sergi and A. Tomczak",

year = "2024",

month = dec,

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

language = "English",

volume = "859",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - First search for K+→π0πμe decays

AU - NA62 Collaboration

AU - Goudzovski, E.

AU - Kenworthy, C.

AU - Lazzeroni, C.

AU - Romano, A.

AU - Sanders, J.

AU - Sergi, A.

AU - Tomczak, A.

PY - 2024/12

Y1 - 2024/12

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

SN - 0370-2693

VL - 859

JO - Physics Letters B

JF - Physics Letters B

M1 - 139122

ER -

First search for K+→π0πμe decays

Abstract

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Projects

KaonToALP - Search for axion-like particle production in kaon decays at CERN-NA62 experiment

H2020_IF_NEWLIGHTSCALAR

FP7_ERC_KaonLepton

Ernest Rutherford Fellowship : Dr Antonio Sergi - Development of the NA62 Detector and Search for New Physics with Kaon Decays

FP7 ERC - UniversaLepto : Test of Lepton Flavour Universality with Kaon Decays

Cite this

First search for K⁺→π⁰πμe decays