A measurement of the K + → π + μ + μ− decay

The NA62 Collaboration

doi:10.1007/JHEP11(2022)011

A measurement of the K ⁺ → π ⁺ μ ⁺ μ⁻ decay

The NA62 Collaboration

University of Louvain
Comenius University
LNF-INFN
European Organization for Nuclear Research
Brookhaven National Laboratory
School of Physics and Astronomy
University of Birmingham
INFN Sezione di Perugia
TRIUMF
University of British Columbia
Charles University
Lund University
Institut für Physik and Prisma Cluster of Excellence
Johannes Gutenberg University
University of Würzburg
European XFEL GmbH
Sezione INFN di Ferrara
SUPA
University of Glasgow
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Dipartimento di Scienze Fisiche
University of Modena and Reggio Emilia
Sofia University St. Kliment Ohridski
INFN Sezione di Napoli
University of Liverpool

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

29 Citations (Scopus)

Abstract

A sample of 2.8 × 10⁴K⁺ → π⁺μ⁺μ⁻ candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) × 10⁻⁸, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at O(p⁶).

Original language	English
Article number	11
Journal	Journal of High Energy Physics
Volume	2022
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2022)011
Publication status	Published - 1 Nov 2022

Keywords

Branching fraction
Fixed Target Experiments
Flavour Changing Neutral Currents
Rare Decay

Access to Document

10.1007/JHEP11(2022)011

Cite this

@article{802c768430d14e53abfd195b9a146ebf,

title = "A measurement of the K + → π + μ + μ− decay",

abstract = "A sample of 2.8 {\texttimes} 104K+ → π+μ+μ− candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017{\textendash}2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) {\texttimes} 10−8, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at O(p6).",

keywords = "Branching fraction, Fixed Target Experiments, Flavour Changing Neutral Currents, Rare Decay",

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 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 V. Kozhuharov and G. Lanfranchi and S. Martellotti and M. Moulson and T. Spadaro and G. Tinti and F. Ambrosino and T. Capussela and M. Corvino and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

month = nov,

day = "1",

doi = "10.1007/JHEP11(2022)011",

language = "English",

volume = "2022",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "11",

}

TY - JOUR

T1 - A measurement of the K + → π + μ + μ− 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 - 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 - Kozhuharov, V.

AU - Lanfranchi, G.

AU - Martellotti, S.

AU - Moulson, M.

AU - Spadaro, T.

AU - Tinti, G.

AU - Ambrosino, F.

AU - Capussela, T.

AU - Corvino, M.

AU - Maurice, E.

PY - 2022/11/1

Y1 - 2022/11/1

N2 - A sample of 2.8 × 104K+ → π+μ+μ− candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) × 10−8, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at O(p6).

AB - A sample of 2.8 × 104K+ → π+μ+μ− candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) × 10−8, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at O(p6).

KW - Branching fraction

KW - Fixed Target Experiments

KW - Flavour Changing Neutral Currents

KW - Rare Decay

U2 - 10.1007/JHEP11(2022)011

DO - 10.1007/JHEP11(2022)011

M3 - Article

AN - SCOPUS:85141191062

SN - 1126-6708

VL - 2022

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 11

M1 - 11