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

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Experimental Particle Physics

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https://doi.org/10.1007/JHEP11(2022)011
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Available under license: CC BY: Creative Commons Attribution 4.0 International License

Keywords

Regular Article - Experimental Physics, Branching fraction, Fixed Target Experiments, Flavour Changing Neutral Currents, Rare Decay

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Research output: Contribution to Journal/Magazine › Journal article › peer-review

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E. Cortina Gil
A. Kleimenova
E. Minucci
S. Padolski
P. Petrov
A. Shaikhiev
R. Volpe
T. Numao
Y. Petrov
B. Velghe
V. W. S. Wong
D. Bryman
J. Fu
T. Husek
J. Jerhot
K. Kampf
M. Zamkovsky
R. Aliberti
G. Khoriauli
J. Kunze
D. Lomidze
L. Peruzzo
M. Vormstein
R. Wanke
P. Dalpiaz
M. Fiorini
I. Neri
A. Norton
F. Petrucci
H. Wahl
A. Cotta Ramusino
A. Gianoli
E. Iacopini
G. Latino
M. Lenti
A. Parenti
A. Bizzeti
F. Bucci
A. Antonelli
G. Georgiev
V. Kozhuharov
G. Lanfranchi
S. Martellotti
M. Moulson
T. Spadaro
G. Tinti
F. Ambrosino
T. Capussela
M. Corvino
D. Di Filippo
R. Fiorenza
P. Massarotti
M. Mirra
M. Napolitano
G. Saracino
G. Anzivino
F. Brizioli
E. Imbergamo
R. Lollini
R. Piandani
C. Santoni
M. Barbanera
P. Cenci
B. Checcucci
P. Lubrano
M. Lupi
M. Pepe
M. Piccini
F. Costantini
L. Di Lella
N. Doble
M. Giorgi
S. Giudici
G. Lamanna
E. Lari
E. Pedreschi
M. Sozzi
C. Cerri
R. Fantechi
L. Pontisso
F. Spinella
I. Mannelli
G. D’Agostini
M. Raggi
A. Biagioni
P. Cretaro
O. Frezza
E. Leonardi
A. Lonardo
M. Turisini
P. Valente
P. Vicini
R. Ammendola
V. Bonaiuto
A. Fucci
A. Salamon
F. Sargeni
R. Arcidiacono
B. Bloch-Devaux
M. Boretto
E. Menichetti
E. Migliore
D. Soldi
C. Biino
A. Filippi
F. Marchetto
J. Engelfried
N. Estrada-Tristan
A. M. Bragadireanu
S. A. Ghinescu
O. E. Hutanu
A. Baeva
D. Baigarashev
D. Emelyanov
T. Enik
V. Falaleev
V. Kekelidze
A. Korotkova
L. Litov
D. Madigozhin
M. Misheva
N. Molokanova
S. Movchan
I. Polenkevich
Yu. Potrebenikov
S. Shkarovskiy
A. Zinchenko
S. Fedotov
E. Gushchin
A. Khotyantsev
Y. Kudenko
V. Kurochka
M. Medvedeva
A. Mefodev
S. Kholodenko
V. Kurshetsov
V. Obraztsov
A. Ostankov
V. Semenov
V. Sugonyaev
O. Yushchenko
L. Bician
T. Blazek
V. Cerny
Z. Kucerova
J. Bernhard
A. Ceccucci
H. Danielsson
N. De Simone
F. Duval
B. Döbrich
L. Federici
E. Gamberini
R. Guida
F. Hahn
E. B. Holzer
B. Jenninger
M. Koval
P. Laycock
G. Lehmann Miotto
P. Lichard
A. Mapelli
R. Marchevski
K. Massri
M. Noy
V. Palladino
M. Perrin-Terrin
J. Pinzino
V. Ryjov
S. Schuchmann
S. Venditti
T. Bache
M. B. Brunetti
V. Duk
V. Fascianelli
J. R. Fry
F. Gonnella
E. Goudzovski
J. Henshaw
L. Iacobuzio
C. Lazzeroni
N. Lurkin
F. Newson
C. Parkinson
A. Romano
A. Sergi
A. Sturgess
J. Swallow
A. Tomczak
H. Heath
R. Page
S. Trilov
B. Angelucci
D. Britton
C. Graham
D. Protopopescu
L. Fulton
D. Hutchcroft
E. Maurice
B. Wrona
A. Conovaloff
D. Coward
P. Rubin

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Article number	11
<mark>Journal publication date</mark>	4/11/2022
<mark>Journal</mark>	Journal of High Energy Physics
Issue number	11
Volume	2022
Number of pages	19
Publication Status	Published
<mark>Original language</mark>	English

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).

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Keywords

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

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