Searches for lepton flavour and lepton number violation in K+ decays

NA62 Collaboration

Searches for lepton flavour and lepton number violation in K⁺ decays

NA62 Collaboration

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

Abstract

The NA62 experiment at CERN offers the highest experimental sensitivity to rare and forbidden kaon decays. A search for lepton number violating processes K⁺ → π⁻e⁺e⁺ and K⁺ → π⁻µ⁺µ⁺, using a partial data set collected by NA62 in 2016-2018, is reported. No signals are observed and upper limits at 90% confidence level on the branching fractions of these decays are obtained: 2.2 × 10⁻¹⁰ and 4.2 × 10⁻¹¹, respectively. These results improve on previously reported measurements by factors of 3 and 2, respectively.

Original language	English
Title of host publication	Proceedings of Science
Volume	364
Publication status	Published - 2019
Event	2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 - Ghent, Belgium Duration: 10 Jul 2019 → 17 Jul 2019

Publication series

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

Conference

Conference	2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019
Country/Territory	Belgium
City	Ghent
Period	10/07/19 → 17/07/19

Bibliographical note

Publisher 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).

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Cite this

@inproceedings{60c85f31389548aa8bf6fda05387c295,

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

abstract = "The NA62 experiment at CERN offers the highest experimental sensitivity to rare and forbidden kaon decays. A search for lepton number violating processes K+ → π−e+e+ and K+ → π−µ+µ+, using a partial data set collected by NA62 in 2016-2018, is reported. No signals are observed and upper limits at 90% confidence level on the branching fractions of these decays are obtained: 2.2 × 10−10 and 4.2 × 10−11, respectively. These results improve on previously reported measurements by factors of 3 and 2, respectively.",

author = "{NA62 Collaboration} and Angela Romano 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 M. Barbanera and J. Bernhard and A. Biagioni and L. Bician and C. Biino and A. Bizzeti and T. Blazek and B. Bloch-Devaux and V. Bonaiuto and M. Boretto and M. Bragadireanu and D. Britton and F. Brizioli and Brunetti, {M. B.} and D. Bryman and F. Bucci and T. Ca-Pussela and J. Carmignani and H. Heath and R. Page and S. Trilov",

note = "Publisher Copyright: {\textcopyright} 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).; 2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 ; Conference date: 10-07-2019 Through 17-07-2019",

year = "2019",

language = "English",

volume = "364",

series = "Proceedings of Science",

publisher = "SISSA",

booktitle = "Proceedings of Science",

}

TY - GEN

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

AU - NA62 Collaboration

AU - Romano, Angela

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 - Barbanera, M.

AU - Bernhard, J.

AU - Biagioni, A.

AU - Bician, L.

AU - Biino, C.

AU - Bizzeti, A.

AU - Blazek, T.

AU - Bloch-Devaux, B.

AU - Bonaiuto, V.

AU - Boretto, M.

AU - Bragadireanu, M.

AU - Britton, D.

AU - Brizioli, F.

AU - Brunetti, M. B.

AU - Bryman, D.

AU - Bucci, F.

AU - Ca-Pussela, T.

AU - Carmignani, J.

AU - Heath, H.

AU - Page, R.

AU - Trilov, S.

N1 - Publisher 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 - 2019

Y1 - 2019

N2 - The NA62 experiment at CERN offers the highest experimental sensitivity to rare and forbidden kaon decays. A search for lepton number violating processes K+ → π−e+e+ and K+ → π−µ+µ+, using a partial data set collected by NA62 in 2016-2018, is reported. No signals are observed and upper limits at 90% confidence level on the branching fractions of these decays are obtained: 2.2 × 10−10 and 4.2 × 10−11, respectively. These results improve on previously reported measurements by factors of 3 and 2, respectively.

AB - The NA62 experiment at CERN offers the highest experimental sensitivity to rare and forbidden kaon decays. A search for lepton number violating processes K+ → π−e+e+ and K+ → π−µ+µ+, using a partial data set collected by NA62 in 2016-2018, is reported. No signals are observed and upper limits at 90% confidence level on the branching fractions of these decays are obtained: 2.2 × 10−10 and 4.2 × 10−11, respectively. These results improve on previously reported measurements by factors of 3 and 2, respectively.

UR - http://www.scopus.com/inward/record.url?scp=85098915144&partnerID=8YFLogxK

M3 - Conference Contribution (Conference Proceeding)

AN - SCOPUS:85098915144

VL - 364

T3 - Proceedings of Science

BT - Proceedings of Science

T2 - 2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019

Y2 - 10 July 2019 through 17 July 2019

ER -