A measurement of the K+→π+μ+μ− decay

NA62 Collaboration

doi:10.1007/JHEP11(2022)011

A measurement of the K+→π+μ+μ− decay

NA62 Collaboration

Physics and Astronomy

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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
Number of pages	19
Journal	JHEP
Volume	2022
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2022)011
Publication status	Published - 4 Nov 2022

Keywords

Branching fraction
Fixed Target Experiments
Flavour Changing Neutral
Currents
Rare Decay
Flavour Changing Neutral Currents

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1 Article

Addendum to: A measurement of the K⁺ → π⁺μ⁺μ⁻ decay
NA62 Collaboration, 8 Jun 2023, In: JHEP. 2023, 6, 4 p., 40.
Research output: Contribution to journal › Article › peer-review

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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, Flavour Changing Neutral Currents",

author = "{NA62 Collaboration} and Evgueni Goudzovski",

year = "2022",

month = nov,

day = "4",

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

language = "English",

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T1 - A measurement of the K+→π+μ+μ− decay

AU - NA62 Collaboration

AU - Goudzovski, Evgueni

PY - 2022/11/4

Y1 - 2022/11/4

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

KW - Currents

KW - Rare Decay

KW - Flavour Changing Neutral Currents

U2 - 10.1007/JHEP11(2022)011

DO - 10.1007/JHEP11(2022)011

M3 - Article

SN - 1126-6708

VL - 2022

JO - JHEP

JF - JHEP

IS - 11

M1 - 11

ER -

A measurement of the K+→π+μ+μ− decay

Abstract

Keywords

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Research output

Addendum to: A measurement of the K+ → π+μ+μ− decay

Cite this

Addendum to: A measurement of the K⁺ → π⁺μ⁺μ⁻ decay