A search for heavy neutral lepton (N) production in K+ -> mu N+ and K+ -> e(+)N decays is carried out by the NA62 experiment using the data collected in 2016-2018. The K+ -> mu N+ results are expressed as upper limits of O(10(-8)) of the neutrino mixing parameter vertical bar U-mu(4)vertical bar(2) for N masses in the range 200-384 MeV/c(2) and lifetime exceeding 50 ns. From the K+ -> e(+)N analysis, upper limits for neutrino mixing matrix element vertical bar U-e(4)vertical bar(2) are established near the level of 10(-9) over most of the accessible heavy neutral lepton mass range 144-462 MeV/c(2), with the same assumption about the heavy lepton lifetime.

Akmete, A., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., et al. (2022). Search for Heavy Neutral Lepton Production in NA62#. MOSCOW UNIVERSITY PHYSICS BULLETIN, 77(2), 220-222 [10.3103/S0027134922020497].

Search for Heavy Neutral Lepton Production in NA62#

V. Bonaiuto;F. Sargeni;
2022-01-01

Abstract

A search for heavy neutral lepton (N) production in K+ -> mu N+ and K+ -> e(+)N decays is carried out by the NA62 experiment using the data collected in 2016-2018. The K+ -> mu N+ results are expressed as upper limits of O(10(-8)) of the neutrino mixing parameter vertical bar U-mu(4)vertical bar(2) for N masses in the range 200-384 MeV/c(2) and lifetime exceeding 50 ns. From the K+ -> e(+)N analysis, upper limits for neutrino mixing matrix element vertical bar U-e(4)vertical bar(2) are established near the level of 10(-9) over most of the accessible heavy neutral lepton mass range 144-462 MeV/c(2), with the same assumption about the heavy lepton lifetime.
2022
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Standart Model
sterile neutrinos
heavy neutral leptons
Akmete, A., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., et al. (2022). Search for Heavy Neutral Lepton Production in NA62#. MOSCOW UNIVERSITY PHYSICS BULLETIN, 77(2), 220-222 [10.3103/S0027134922020497].
Akmete, A; Aliberti, R; Ambrosino, F; Ammendola, R; Angelucci, B; Antonelli, A; Anzivino, G; Arcidiacono, R; Bache, T; Baeva, A; Baigarashev, D; Bandi...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/306174
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