Searches for lepton number violating K+ decays

The NA62 Collaboration

doi:10.1016/j.physletb.2019.07.041

Searches for lepton number violating K⁺ decays

The NA62 Collaboration

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

Abstract

The NA62 experiment at CERN reports a search for the lepton number violating decays K⁺ → π^-e⁺e⁺ and K⁺ → π^-μ⁺μ⁺using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2 ×10^-10 and 4.2 × 10^-11 are obtained, respectively, at 90% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively.

Original language	English
Article number	134794
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	797
DOIs	https://doi.org/10.1016/j.physletb.2019.07.041
Publication status	Published - 10 Oct 2019
Externally published	Yes

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10.1016/j.physletb.2019.07.041

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@article{c5433f84ee4949a4bfc05c6ff6bbc724,

title = "Searches for lepton number violating K+ decays",

abstract = "The NA62 experiment at CERN reports a search for the lepton number violating decays K+ → π-e+e+ and K+ → π-μ+μ+using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2 ×10-10 and 4.2 × 10-11 are obtained, respectively, at 90\% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively.",

author = "\{The NA62 Collaboration\} and \{Cortina Gil\}, E. and A. Kleimenova 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 D. Bryman and J. Fu and T. Husek and J. Jerhot and K. Kampf and M. Zamkovsky 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 H. Wahl and \{Cotta Ramusino\}, A. and A. Gianoli and E. Iacopini and G. Latino and M. Lenti and A. Parenti and A. Bizzeti and F. Bucci and A. Antonelli and G. Georgiev and V. Kozhuharov and G. Lanfranchi and G. Mannocchi and S. Martellotti and M. Moulson and T. Spadaro and F. Ambrosino and T. Capussela and M. Corvino and \{Di Filippo\}, D. and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2019 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license.",

year = "2019",

month = oct,

day = "10",

doi = "10.1016/j.physletb.2019.07.041",

language = "English",

volume = "797",

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

issn = "0370-2693",

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TY - JOUR

T1 - Searches for lepton number violating K+ decays

AU - The NA62 Collaboration

AU - Cortina Gil, E.

AU - Kleimenova, A.

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 - Bryman, D.

AU - Fu, J.

AU - Husek, T.

AU - Jerhot, J.

AU - Kampf, K.

AU - Zamkovsky, M.

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 - Wahl, H.

AU - Cotta Ramusino, A.

AU - Gianoli, A.

AU - Iacopini, E.

AU - Latino, G.

AU - Lenti, M.

AU - Parenti, A.

AU - Bizzeti, A.

AU - Bucci, F.

AU - Antonelli, A.

AU - Georgiev, G.

AU - Kozhuharov, V.

AU - Lanfranchi, G.

AU - Mannocchi, G.

AU - Martellotti, S.

AU - Moulson, M.

AU - Spadaro, T.

AU - Ambrosino, F.

AU - Capussela, T.

AU - Corvino, M.

AU - Di Filippo, D.

AU - Maurice, E.

PY - 2019/10/10

Y1 - 2019/10/10

N2 - The NA62 experiment at CERN reports a search for the lepton number violating decays K+ → π-e+e+ and K+ → π-μ+μ+using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2 ×10-10 and 4.2 × 10-11 are obtained, respectively, at 90% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively.

AB - The NA62 experiment at CERN reports a search for the lepton number violating decays K+ → π-e+e+ and K+ → π-μ+μ+using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2 ×10-10 and 4.2 × 10-11 are obtained, respectively, at 90% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively.

UR - https://www.scopus.com/pages/publications/85069869698

U2 - 10.1016/j.physletb.2019.07.041

DO - 10.1016/j.physletb.2019.07.041

M3 - Article

AN - SCOPUS:85069869698

SN - 0370-2693

VL - 797

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 - 134794

ER -

Searches for lepton number violating K⁺ decays

Abstract

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