Search for heavy neutral lepton production in K+ decays to positrons

The NA62 Collaboration

doi:10.1016/j.physletb.2020.135599

Search for heavy neutral lepton production in K⁺ decays to positrons

The NA62 Collaboration

University of Louvain
TRIUMF
University of British Columbia
Charles University
Johannes Gutenberg University
Sezione INFN di Ferrara
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
LNF-INFN
INFN Sezione di Napoli
University of Liverpool
INFN Sezione di Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Scuola Normale Superiore di Pisa
University of Rome
Sezione di Roma
INFN Roma Tor Vergata
INFN Sezione di Torino
Universidad Autónoma de San Luis Potosi
Horia Hulubei National Institute of Physics and Nuclear Engineering
Joint Institute for Nuclear Research, Dubna
Institute for Nuclear Research of the Russian Academy of Sciences
National Research Nuclear University MEPhI
Kurchatov Institute
Comenius University
European Organization for Nuclear Research
University of Birmingham
University of Bristol
University of Glasgow
Lancaster University
George Mason University

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

A search for heavy neutral lepton (N) production in K⁺→e⁺N decays using the data sample collected by the NA62 experiment at CERN in 2017–2018 is reported. Upper limits of the extended neutrino mixing matrix element |U_e4|² are established at the level of 10⁻⁹ over most of the accessible heavy neutral lepton mass range 144–462 MeV/c², with the assumption that the lifetime exceeds 50 ns. These limits improve significantly upon those of previous production and decay searches. The |U_e4|² range favoured by Big Bang Nucleosynthesis is excluded up to a mass of about 340 MeV/c².

langue originale	Anglais
Numéro d'article	135599
journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	807
Les DOIs	https://doi.org/10.1016/j.physletb.2020.135599
état	Publié - 10 août 2020
Modification externe	Oui

Accès au document

10.1016/j.physletb.2020.135599

Contient cette citation

@article{30979fc52eb146b29630ff8f04063918,

title = "Search for heavy neutral lepton production in K+ decays to positrons",

abstract = "A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by the NA62 experiment at CERN in 2017–2018 is reported. Upper limits of the extended neutrino mixing matrix element |Ue4|2 are established at the level of 10−9 over most of the accessible heavy neutral lepton mass range 144–462 MeV/c2, with the assumption that the lifetime exceeds 50 ns. These limits improve significantly upon those of previous production and decay searches. The |Ue4|2 range favoured by Big Bang Nucleosynthesis is excluded up to a mass of about 340 MeV/c2.",

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 S. Martellotti and M. Moulson and T. Spadaro and F. Ambrosino and T. Capussela and M. Corvino and \{Di Filippo\}, D. and P. Massarotti and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

month = aug,

day = "10",

doi = "10.1016/j.physletb.2020.135599",

language = "English",

volume = "807",

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

issn = "0370-2693",

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TY - JOUR

T1 - Search for heavy neutral lepton production in K+ decays to positrons

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 - Martellotti, S.

AU - Moulson, M.

AU - Spadaro, T.

AU - Ambrosino, F.

AU - Capussela, T.

AU - Corvino, M.

AU - Di Filippo, D.

AU - Massarotti, P.

AU - Maurice, E.

PY - 2020/8/10

Y1 - 2020/8/10

N2 - A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by the NA62 experiment at CERN in 2017–2018 is reported. Upper limits of the extended neutrino mixing matrix element |Ue4|2 are established at the level of 10−9 over most of the accessible heavy neutral lepton mass range 144–462 MeV/c2, with the assumption that the lifetime exceeds 50 ns. These limits improve significantly upon those of previous production and decay searches. The |Ue4|2 range favoured by Big Bang Nucleosynthesis is excluded up to a mass of about 340 MeV/c2.

AB - A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by the NA62 experiment at CERN in 2017–2018 is reported. Upper limits of the extended neutrino mixing matrix element |Ue4|2 are established at the level of 10−9 over most of the accessible heavy neutral lepton mass range 144–462 MeV/c2, with the assumption that the lifetime exceeds 50 ns. These limits improve significantly upon those of previous production and decay searches. The |Ue4|2 range favoured by Big Bang Nucleosynthesis is excluded up to a mass of about 340 MeV/c2.

U2 - 10.1016/j.physletb.2020.135599

DO - 10.1016/j.physletb.2020.135599

M3 - Article

AN - SCOPUS:85087480211

SN - 0370-2693

VL - 807

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 - 135599

ER -

Search for heavy neutral lepton production in K+ decays to positrons

Résumé

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Contient cette citation

Search for heavy neutral lepton production in K⁺ decays to positrons