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

School of Physics

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

12 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 - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s).

Keywords

Branching fraction
Fixed Target Experiments
Flavour Changing Neutral Currents
Rare Decay

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

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).",

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 A. Shaikhiev and R. Volpe and T. Numao and Y. Petrov and B. Velghe and D. Bryman 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 H. Heath and R. Page and S. Trilov",

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

year = "2022",

month = nov,

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

language = "English",

volume = "2022",

journal = "Journal of High Energy Physics",

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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 - Shaikhiev, A.

AU - Volpe, R.

AU - Numao, T.

AU - Petrov, Y.

AU - Velghe, B.

AU - Bryman, D.

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 - Heath, H.

AU - Page, R.

AU - Trilov, S.

PY - 2022/11

Y1 - 2022/11

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

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U2 - 10.1007/JHEP11(2022)011

DO - 10.1007/JHEP11(2022)011

M3 - Article (Academic Journal)

AN - SCOPUS:85141191062

SN - 1029-8479

VL - 2022

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 11

M1 - 11

ER -