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Measurement of the very rare K + → π+νν¯ decay

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Measurement of the very rare K + → π+νν¯ decay. / NA62 Collaboration.
In: Journal of High Energy Physics, Vol. 2021, No. 6, 93, 15.06.2021.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

NA62 Collaboration 2021, 'Measurement of the very rare K + → π+νν¯ decay', Journal of High Energy Physics, vol. 2021, no. 6, 93. https://doi.org/10.1007/JHEP06(2021)093

APA

NA62 Collaboration (2021). Measurement of the very rare K + → π+νν¯ decay. Journal of High Energy Physics, 2021(6), Article 93. https://doi.org/10.1007/JHEP06(2021)093

Vancouver

NA62 Collaboration. Measurement of the very rare K + → π+νν¯ decay. Journal of High Energy Physics. 2021 Jun 15;2021(6):93. doi: 10.1007/JHEP06(2021)093

Author

NA62 Collaboration. / Measurement of the very rare K + → π+νν¯ decay. In: Journal of High Energy Physics. 2021 ; Vol. 2021, No. 6.

Bibtex

@article{91dd93a04c5943ecbe60c67c1c44e2f2,
title = "Measurement of the very rare K + → π+νν¯ decay",
abstract = "The NA62 experiment reports the branching ratio measurement BR(K+→π+νν¯)=(10.6−3.4+4.0|stat±0.9syst)×10−11 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+νν¯ 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. This measurement is also used to set limits on BR(K+→ π+X), where X is a scalar or pseudo-scalar particle. Details are given of the analysis of the 2018 data sample, which corresponds to about 80% of the total data sample. ",
keywords = "FCNC Interaction, Fixed target experiments, Flavor physics, Flavour Changing Neutral Currents, Rare decay",
author = "{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 L. Gatignon and J.R. Fry and C. Parkinson and R. Page and D. Britton and C. Graham and J. Carmignani and J.B. Dainton and R.W.L. Jones and G. Ruggiero and P. Cooper",
year = "2021",
month = jun,
day = "15",
doi = "10.1007/JHEP06(2021)093",
language = "English",
volume = "2021",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer-Verlag",
number = "6",

}

RIS

TY - JOUR

T1 - Measurement of the very rare K + → π+νν¯ decay

AU - 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 - Gatignon, L.

AU - Fry, J.R.

AU - Parkinson, C.

AU - Page, R.

AU - Britton, D.

AU - Graham, C.

AU - Carmignani, J.

AU - Dainton, J.B.

AU - Jones, R.W.L.

AU - Ruggiero, G.

AU - Cooper, P.

PY - 2021/6/15

Y1 - 2021/6/15

N2 - The NA62 experiment reports the branching ratio measurement BR(K+→π+νν¯)=(10.6−3.4+4.0|stat±0.9syst)×10−11 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+νν¯ 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. This measurement is also used to set limits on BR(K+→ π+X), where X is a scalar or pseudo-scalar particle. Details are given of the analysis of the 2018 data sample, which corresponds to about 80% of the total data sample.

AB - The NA62 experiment reports the branching ratio measurement BR(K+→π+νν¯)=(10.6−3.4+4.0|stat±0.9syst)×10−11 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+νν¯ 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. This measurement is also used to set limits on BR(K+→ π+X), where X is a scalar or pseudo-scalar particle. Details are given of the analysis of the 2018 data sample, which corresponds to about 80% of the total data sample.

KW - FCNC Interaction

KW - Fixed target experiments

KW - Flavor physics

KW - Flavour Changing Neutral Currents

KW - Rare decay

U2 - 10.1007/JHEP06(2021)093

DO - 10.1007/JHEP06(2021)093

M3 - Journal article

VL - 2021

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 6

M1 - 93

ER -