A study of the K + → π 0 e + νγ decay

The NA62 Collaboration

doi:10.1007/JHEP09(2023)040

A study of the K ⁺ → π ⁰ e ⁺ νγ decay

The NA62 Collaboration

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

4 Citations (Scopus)

Abstract

A sample of 1.3 × 10⁵ K ⁺ → π ⁰ e ⁺ νγ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017–2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.

Original language	English
Article number	40
Journal	Journal of High Energy Physics
Volume	2023
Issue number	9
DOIs	https://doi.org/10.1007/JHEP09(2023)040
Publication status	Published - 7 Sept 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s).

Keywords

Branching fraction
Electroweak Interaction
Fixed Target Experiments
Flavour Physics

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10.1007/JHEP09(2023)040

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Cite this

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title = "A study of the K + → π 0 e + νγ decay",

abstract = "A sample of 1.3 × 105 K + → π 0 e + νγ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017–2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.",

keywords = "Branching fraction, Electroweak Interaction, Fixed Target Experiments, Flavour Physics",

author = "{The NA62 Collaboration} and {Cortina Gil}, E. and A. Kleimenova and E. Minucci and S. Padolski and A. Shaikhiev and R. Volpe and T. Numao and Y. Petrov and B. Velghe and D. Bryman and Z. Hives and T. Husek and J. Jerhot and K. Kampf and M. Zamkovsky and {De Martino}, B. and M. Perrin-Terrin and Akmete, {A. T.} 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 H. Heath and R. Page and S. Trilov",

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

year = "2023",

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day = "7",

doi = "10.1007/JHEP09(2023)040",

language = "English",

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TY - JOUR

T1 - A study of the K + → π 0 e + νγ decay

AU - The NA62 Collaboration

AU - Cortina Gil, E.

AU - Kleimenova, A.

AU - Minucci, E.

AU - Padolski, S.

AU - Shaikhiev, A.

AU - Volpe, R.

AU - Numao, T.

AU - Petrov, Y.

AU - Velghe, B.

AU - Bryman, D.

AU - Hives, Z.

AU - Husek, T.

AU - Jerhot, J.

AU - Kampf, K.

AU - Zamkovsky, M.

AU - De Martino, B.

AU - Perrin-Terrin, M.

AU - Akmete, A. T.

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 - Heath, H.

AU - Page, R.

AU - Trilov, S.

PY - 2023/9/7

Y1 - 2023/9/7

N2 - A sample of 1.3 × 105 K + → π 0 e + νγ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017–2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.

AB - A sample of 1.3 × 105 K + → π 0 e + νγ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017–2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.

KW - Branching fraction

KW - Electroweak Interaction

KW - Fixed Target Experiments

KW - Flavour Physics

UR - http://www.scopus.com/inward/record.url?scp=85177635925&partnerID=8YFLogxK

U2 - 10.1007/JHEP09(2023)040

DO - 10.1007/JHEP09(2023)040

M3 - Article (Academic Journal)

AN - SCOPUS:85177635925

SN - 1029-8479

VL - 2023

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 9

M1 - 40

ER -