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

University of Louvain
ENAC-IIC-GEL
Syracuse University
Faculty of Science and Technology, Lancaster University
INFN Sezione di Perugia
TRIUMF
University of British Columbia
Charles University
European Organization for Nuclear Research
Aix-Marseille Université
Johannes Gutenberg University
University of Würzburg
European XFEL GmbH
Sezione INFN di Ferrara
University of Glasgow
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
University of Modena and Reggio Emilia
University of Liverpool
LNF-INFN
Sofia University St. Kliment Ohridski
INFN Sezione di Napoli
Scuola Superiore Meridionale
Universidad Autónoma de San Luis Potosi
Goethe University Frankfurt am Main
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Sezione di Roma
Scuola Normale Superiore di Pisa
University of Rome
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
INFN Sezione di Torino
Laboratory of Molecular Pathology
Universidad de Guanajuato
Horia Hulubei National Institute of Physics and Nuclear Engineering
Comenius University
c/o DESY
Max-Planck-Institut für Physik
Brookhaven National Laboratory
University of Birmingham
University of Warwick
Columbia University
Sezione di Genova
University of Bristol
George Mason University
Stanford Linear Accelerator Center
L.N. Gumilyov Eurasian National University
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

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.

langue originale	Anglais
Numéro d'article	40
journal	Journal of High Energy Physics
Volume	2023
Numéro de publication	9
Les DOIs	https://doi.org/10.1007/JHEP09(2023)040
état	Publié - 1 sept. 2023

Accès au document

10.1007/JHEP09(2023)040

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Contient cette citation

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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 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",

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

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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

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M1 - 40