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

Research output: Contribution to journal › Article › peer-review

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 - 1 Sept 2023

Keywords

Branching fraction
Electroweak Interaction
Fixed Target Experiments
Flavour Physics

Access to Document

10.1007/JHEP09(2023)040

Cite this

@article{84fb288f4132488680d4e0f91634e578,

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 P. Petrov and A. Shaikhiev and R. Volpe and T. Numao and Y. Petrov and B. Velghe and Wong, \{V. W.S.\} and D. Bryman and J. Fu 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 A. Mazzolari and I. Neri and A. Norton and F. Petrucci and M. Soldani and H. Wahl and L. Bandiera and \{Cotta Ramusino\}, A. and A. Gianoli and M. Romagnoni and A. Sytov and E. Iacopini and G. Latino and M. Lenti and \{Lo Chiatto\}, P. and I. Panichi and A. Parenti and A. Bizzeti and F. Bucci and E. Maurice",

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

year = "2023",

month = sep,

day = "1",

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

language = "English",

volume = "2023",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

number = "9",

}

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 - Petrov, P.

AU - Shaikhiev, A.

AU - Volpe, R.

AU - Numao, T.

AU - Petrov, Y.

AU - Velghe, B.

AU - Wong, V. W.S.

AU - Bryman, D.

AU - Fu, J.

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 - Mazzolari, A.

AU - Neri, I.

AU - Norton, A.

AU - Petrucci, F.

AU - Soldani, M.

AU - Wahl, H.

AU - Bandiera, L.

AU - Cotta Ramusino, A.

AU - Gianoli, A.

AU - Romagnoni, M.

AU - Sytov, A.

AU - Iacopini, E.

AU - Latino, G.

AU - Lenti, M.

AU - Lo Chiatto, P.

AU - Panichi, I.

AU - Parenti, A.

AU - Bizzeti, A.

AU - Bucci, F.

AU - Maurice, E.

PY - 2023/9/1

Y1 - 2023/9/1

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 - https://www.scopus.com/pages/publications/85177635925

U2 - 10.1007/JHEP09(2023)040

DO - 10.1007/JHEP09(2023)040

M3 - Article

AN - SCOPUS:85177635925

SN - 1126-6708

VL - 2023

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 9

M1 - 40

ER -

A study of the K ⁺ → π ⁰ e ⁺ νγ decay

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this