A search for the K+ → μ−νe+e+ decay

The NA62 Collaboration

doi:10.1016/j.physletb.2023.137679

A search for the K⁺ → μ⁻νe⁺e⁺ decay

The NA62 Collaboration

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

Abstract

A search for the K⁺→μ⁻νe⁺e⁺ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10⁻¹¹ is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.

Original language	English
Article number	137679
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	838
DOIs	https://doi.org/10.1016/j.physletb.2023.137679
Publication status	Published - 10 Mar 2023
Externally published	Yes

Keywords

Kaon decays
Lepton flavour violation
Lepton number violation

Access to Document

10.1016/j.physletb.2023.137679

Cite this

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title = "A search for the K+ → μ−νe+e+ decay",

abstract = "A search for the K+→μ−νe+e+ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10−11 is obtained for the decay branching fraction at 90\% CL, improving by a factor of 250 over the previous search.",

keywords = "Kaon decays, Lepton flavour violation, Lepton number violation",

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 Wong, \{V. W.S.\} 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 S. Martellotti and M. Moulson and T. Spadaro and G. Tinti and F. Ambrosino and T. Capussela and M. Corvino and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s)",

year = "2023",

month = mar,

day = "10",

doi = "10.1016/j.physletb.2023.137679",

language = "English",

volume = "838",

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

issn = "0370-2693",

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TY - JOUR

T1 - A search for the K+ → μ−νe+e+ decay

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 - Wong, V. W.S.

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 - Martellotti, S.

AU - Moulson, M.

AU - Spadaro, T.

AU - Tinti, G.

AU - Ambrosino, F.

AU - Capussela, T.

AU - Corvino, M.

AU - Maurice, E.

PY - 2023/3/10

Y1 - 2023/3/10

N2 - A search for the K+→μ−νe+e+ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10−11 is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.

AB - A search for the K+→μ−νe+e+ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10−11 is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.

KW - Kaon decays

KW - Lepton flavour violation

KW - Lepton number violation

UR - https://www.scopus.com/pages/publications/85146583658

U2 - 10.1016/j.physletb.2023.137679

DO - 10.1016/j.physletb.2023.137679

M3 - Article

AN - SCOPUS:85146583658

SN - 0370-2693

VL - 838

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 - 137679

ER -

A search for the K⁺ → μ⁻νe⁺e⁺ decay

Abstract

Keywords

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A search for the K+ → μ−νe+e+ decay

Abstract

Keywords

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Cite this

A search for the K⁺ → μ⁻νe⁺e⁺ decay