Search for lepton number and flavour violation in K+ and π0 decays

NA62 Collaboration

doi:10.22323/1.380.0426

Search for lepton number and flavour violation in K⁺ and π⁰ decays

NA62 Collaboration

School of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Abstract

The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with branching ratios as low as 10⁻¹¹. Searches for the lepton number violating K⁺ → π⁻µ⁺e⁺ decay and the lepton flavour violating K⁺ → π⁺µ⁻e⁺ and π⁰ → µ⁻e⁺ decays are reported. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level. These results improve by one order of magnitude over previous results for these decay modes.

Original language	English
Title of host publication	Proceedings of Science
Publisher	PoS
Volume	380
DOIs	https://doi.org/10.22323/1.380.0426
Publication status	Published - 24 May 2022
Event	22nd Particles and Nuclei International Conference, PANIC 2021 - Virtual, Online, Portugal Duration: 5 Sept 2021 → 10 Sept 2021

Publication series

Name	Proceedings of Science
Publisher	SISSA
ISSN (Print)	1824-8039

Conference

Conference	22nd Particles and Nuclei International Conference, PANIC 2021
Country/Territory	Portugal
City	Virtual, Online
Period	5/09/21 → 10/09/21

Bibliographical note

Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

Access to Document

10.22323/1.380.0426Licence: CC BY-NC-ND

Handle.net

Persistent link

Cite this

@inproceedings{3fba9e4980924a73aa374fac307325d1,

title = "Search for lepton number and flavour violation in K+ and π0 decays",

abstract = "The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with branching ratios as low as 10−11. Searches for the lepton number violating K+ → π−µ+e+ decay and the lepton flavour violating K+ → π+µ−e+ and π0 → µ−e+ decays are reported. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90\% confidence level. These results improve by one order of magnitude over previous results for these decay modes.",

author = "\{NA62 Collaboration\} and Roberta Volpe and A. Akmete and R. Aliberti and F. Ambrosino and R. Ammendola and B. Angelucci and A. Antonelli and G. Anzivino and R. Arcidiacono and T. Bache and A. Baeva and D. Baigarashev and L. Bandiera and M. Barbanera and J. Bern-Hard and A. Biagioni and L. Bician and C. Biino and A. Bizzeti and T. Blazek and B. Bloch-Devaux and P. Boboc and V. Bonaiuto and M. Boretto and M. Bragadireanu and A. BrianoOlvera and D. Britton and H. Heath and R. Page and S. Trilov",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0); 22nd Particles and Nuclei International Conference, PANIC 2021 ; Conference date: 05-09-2021 Through 10-09-2021",

year = "2022",

month = may,

day = "24",

doi = "10.22323/1.380.0426",

language = "English",

volume = "380",

series = "Proceedings of Science",

publisher = "PoS",

booktitle = "Proceedings of Science",

}

TY - GEN

T1 - Search for lepton number and flavour violation in K+ and π0 decays

AU - NA62 Collaboration

AU - Volpe, Roberta

AU - Akmete, A.

AU - Aliberti, R.

AU - Ambrosino, F.

AU - Ammendola, R.

AU - Angelucci, B.

AU - Antonelli, A.

AU - Anzivino, G.

AU - Arcidiacono, R.

AU - Bache, T.

AU - Baeva, A.

AU - Baigarashev, D.

AU - Bandiera, L.

AU - Barbanera, M.

AU - Bern-Hard, J.

AU - Biagioni, A.

AU - Bician, L.

AU - Biino, C.

AU - Bizzeti, A.

AU - Blazek, T.

AU - Bloch-Devaux, B.

AU - Boboc, P.

AU - Bonaiuto, V.

AU - Boretto, M.

AU - Bragadireanu, M.

AU - BrianoOlvera, A.

AU - Britton, D.

AU - Heath, H.

AU - Page, R.

AU - Trilov, S.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

PY - 2022/5/24

Y1 - 2022/5/24

N2 - The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with branching ratios as low as 10−11. Searches for the lepton number violating K+ → π−µ+e+ decay and the lepton flavour violating K+ → π+µ−e+ and π0 → µ−e+ decays are reported. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level. These results improve by one order of magnitude over previous results for these decay modes.

AB - The NA62 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with branching ratios as low as 10−11. Searches for the lepton number violating K+ → π−µ+e+ decay and the lepton flavour violating K+ → π+µ−e+ and π0 → µ−e+ decays are reported. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level. These results improve by one order of magnitude over previous results for these decay modes.

UR - https://www.scopus.com/pages/publications/85131675284

U2 - 10.22323/1.380.0426

DO - 10.22323/1.380.0426

M3 - Conference Contribution (Conference Proceeding)

AN - SCOPUS:85131675284

VL - 380

T3 - Proceedings of Science

BT - Proceedings of Science

PB - PoS

T2 - 22nd Particles and Nuclei International Conference, PANIC 2021

Y2 - 5 September 2021 through 10 September 2021

ER -