TY - JOUR
T1 - Measurement of the very rare K+ → π+ν(Equation presented) decay at the NA62 experiment at CERN
AU - The NA62 Collaboration
AU - Fiorenza, Renato
AU - Akmete, A.
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 - Baeva, A.
AU - Baigarashev, D.
AU - Bandiera, L.
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 - Boboc, P.
AU - Bonaiuto, V.
AU - Boretto, M.
AU - Bragadireanu, M.
AU - Briano Olvera, A.
AU - Britton, D.
AU - Brizioli, F.
AU - Brunetti, M. B.
AU - Bryman, D.
AU - Bucci, F.
AU - Capussela, 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 - Cretaro, P.
AU - D'Agostini, G.
AU - Dainton, J.
AU - Dalpiaz, P.
AU - Maurice, E.
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons
PY - 2022/3/31
Y1 - 2022/3/31
N2 - The NA62 experiment reports the branching ratio measurement BR(K+ → π+ν(Equation presented)) at 68 % CL, based on the observation of 20 signal candidates with an expected background of 7.0 events from the total data sample collected at the CERN SPS during 2016-2018. This provides evidence for the very rare K+ → π+ν(Equation presented) decay, observed with a significance of 3.4σ. The experiment achieves a single event sensitivity of (0.839 ± 0.054) × 10−11, corresponding to 10.0 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10−11. The result represents the most accurate measurement achieved so far of this ultra-rare decay. Future prospects and plans for data taking from 2021 will also be presented.
AB - The NA62 experiment reports the branching ratio measurement BR(K+ → π+ν(Equation presented)) at 68 % CL, based on the observation of 20 signal candidates with an expected background of 7.0 events from the total data sample collected at the CERN SPS during 2016-2018. This provides evidence for the very rare K+ → π+ν(Equation presented) decay, observed with a significance of 3.4σ. The experiment achieves a single event sensitivity of (0.839 ± 0.054) × 10−11, corresponding to 10.0 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10−11. The result represents the most accurate measurement achieved so far of this ultra-rare decay. Future prospects and plans for data taking from 2021 will also be presented.
UR - https://www.scopus.com/pages/publications/85128882590
M3 - Conference article
AN - SCOPUS:85128882590
SN - 1824-8039
VL - 402
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 176
T2 - 22nd International Workshop on Neutrinos from Accelerators, NuFact 2021
Y2 - 6 September 2021 through 11 September 2021
ER -