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

University of Birmingham

Research output: Contribution to journal › Conference article › peer-review

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
Article number	222
Journal	Proceedings of Science
Volume	364
Publication status	Published - 1 Jan 2019
Event	2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 - Ghent, Belgium Duration: 10 Jul 2019 → 17 Jul 2019

Cite this

@article{78063f71675a456d9208687539542bd4,

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 A. Ceccucci and P. Cenci and V. Cerny and C. Cerri and B. Checcucci and A. Conovaloff and P. Cooper and \{Cortina Gil\}, E. and M. Corvino and F. Costantini and \{Cotta Ramusino\}, A. and D. Coward and G. D'Agostini and J. Dainton and P. Dalpiaz and H. Danielsson and \{de Simone\}, N. and \{Di Filippo\}, D. and \{Di Lella\}, L. and N. Doble and B. Dobrich and F. Duval and E. Maurice",

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",

month = jan,

day = "1",

language = "English",

volume = "364",

journal = "Proceedings of Science",

issn = "1824-8039",

}

TY - JOUR

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 - Ceccucci, A.

AU - Cenci, P.

AU - Cerny, V.

AU - Cerri, C.

AU - Checcucci, B.

AU - Conovaloff, A.

AU - Cooper, P.

AU - Cortina Gil, E.

AU - Corvino, M.

AU - Costantini, F.

AU - Cotta Ramusino, A.

AU - Coward, D.

AU - D'Agostini, G.

AU - Dainton, J.

AU - Dalpiaz, P.

AU - Danielsson, H.

AU - de Simone, N.

AU - Di Filippo, D.

AU - Di Lella, L.

AU - Doble, N.

AU - Dobrich, B.

AU - Duval, F.

AU - Maurice, E.

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 - 2019/1/1

Y1 - 2019/1/1

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 - https://www.scopus.com/pages/publications/85098915144

M3 - Conference article

AN - SCOPUS:85098915144

SN - 1824-8039

VL - 364

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 222

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

Y2 - 10 July 2019 through 17 July 2019

ER -

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

Abstract

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