Searches for hidden sectors using K+ → π+X decays

NA62 Collaboration; T. Bache; F. Brizioli; M. B. Brunetti; V. Duk; V. Fascianelli; J. R. Fry; F. Gonnella; E. Goudzovski; J. Henshaw; T. Husek; L. Iacobuzio; C. Kenworthy; C. Lazzeroni; N. Lurkin; F. Newson; C. Parkinson; M. Raggi; A. Romano; C. Sam; A. Sergi; A. Sturgess; J. Swallow; A. Tomczak

doi:10.1007/JHEP11(2025)143

Searches for hidden sectors using K⁺ → π⁺X decays

NA62 Collaboration
, T. Bache
, F. Brizioli^*
, M. B. Brunetti
, V. Duk
, V. Fascianelli
, J. R. Fry
, F. Gonnella
, E. Goudzovski
, J. Henshaw
, T. Husek
, L. Iacobuzio
, C. Kenworthy
, C. Lazzeroni
, N. Lurkin
, F. Newson
, C. Parkinson
, M. Raggi^*
, A. Romano
, C. Sam

A. Sergi, A. Sturgess, J. Swallow^*, A. Tomczak

^*Corresponding author for this work

Physics and Astronomy

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

Abstract

Results from the study of the rare decays K⁺ → π⁺νν¯, K⁺ → π⁺μ⁺μ⁻ and K⁺ → π⁺γγ at the NA62 experiment at CERN are interpreted in terms of improved limits for B(K⁺ → π⁺X) and coupling parameters of hidden-sector models, where X is a mediator. World-leading limits are achieved for dark photon, dark scalar and axion-like particle models.

Original language	English
Article number	143
Number of pages	24
Journal	Journal of High Energy Physics
Volume	2025
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2025)143
Publication status	Published - 24 Nov 2025

Keywords

Beyond Standard Model
Fixed Target Experiments

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10.1007/JHEP11(2025)143Licence: Creative Commons: Attribution (CC BY)

NA62collab2025SearchesFinal published version, 3.04 MBLicence: Creative Commons: Attribution (CC BY)

KaonToALP - Search for axion-like particle production in kaon decays at CERN-NA62 experiment
Goudzovski, E. (Principal Investigator)
European Commission
4/05/21 → 11/07/23
Project: EU
H2020_IF_NEWLIGHTSCALAR
Goudzovski, E. (Principal Investigator)
European Commission
3/07/17 → 2/07/19
Project: EU
FP7_ERC_KaonLepton
Lazzeroni, C. (Co-Investigator) & Goudzovski, E. (Principal Investigator)
European Commission, European Commission - Management Costs
1/01/14 → 30/06/19
Project: Research
Ernest Rutherford Fellowship : Dr Antonio Sergi - Development of the NA62 Detector and Search for New Physics with Kaon Decays
Sergi, A. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
25/03/13 → 24/03/18
Project: Research Councils
FP7 ERC - UniversaLepto : Test of Lepton Flavour Universality with Kaon Decays
Lazzeroni, C. (Principal Investigator)
European Commission - Management Costs, European Commission
1/09/11 → 31/08/16
Project: Research

Cite this

NA62 Collaboration, Bache, T., Brizioli, F., Brunetti, M. B., Duk, V., Fascianelli, V., Fry, J. R., Gonnella, F., Goudzovski, E., Henshaw, J., Husek, T., Iacobuzio, L., Kenworthy, C., Lazzeroni, C., Lurkin, N., Newson, F., Parkinson, C., Raggi, M., Romano, A., ... Tomczak, A. (2025). Searches for hidden sectors using K⁺ → π⁺X decays. Journal of High Energy Physics, 2025(11), Article 143. https://doi.org/10.1007/JHEP11(2025)143

@article{b673c73249514b238d059be15896e806,

title = "Searches for hidden sectors using K+ → π+X decays",

abstract = "Results from the study of the rare decays K+ → π+νν¯, K+ → π+μ+μ− and K+ → π+γγ at the NA62 experiment at CERN are interpreted in terms of improved limits for B(K+ → π+X) and coupling parameters of hidden-sector models, where X is a mediator. World-leading limits are achieved for dark photon, dark scalar and axion-like particle models.",

keywords = "Beyond Standard Model, Fixed Target Experiments",

author = "\{NA62 Collaboration\} and T. Bache and F. Brizioli and Brunetti, \{M. B.\} and V. Duk and V. Fascianelli and Fry, \{J. R.\} and F. Gonnella and E. Goudzovski and J. Henshaw and T. Husek and L. Iacobuzio and C. Kenworthy and C. Lazzeroni and N. Lurkin and F. Newson and C. Parkinson and M. Raggi and A. Romano and C. Sam and A. Sergi and A. Sturgess and J. Swallow and A. Tomczak",

year = "2025",

month = nov,

day = "24",

doi = "10.1007/JHEP11(2025)143",

language = "English",

volume = "2025",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "11",

}

NA62 Collaboration, Bache, T, Brizioli, F, Brunetti, MB, Duk, V, Fascianelli, V, Fry, JR, Gonnella, F, Goudzovski, E, Henshaw, J, Husek, T, Iacobuzio, L, Kenworthy, C, Lazzeroni, C, Lurkin, N, Newson, F, Parkinson, C, Raggi, M, Romano, A, Sam, C, Sergi, A, Sturgess, A, Swallow, J & Tomczak, A 2025, 'Searches for hidden sectors using K⁺ → π⁺X decays', Journal of High Energy Physics, vol. 2025, no. 11, 143. https://doi.org/10.1007/JHEP11(2025)143

TY - JOUR

T1 - Searches for hidden sectors using K+ → π+X decays

AU - NA62 Collaboration

AU - Bache, T.

AU - Brizioli, F.

AU - Brunetti, M. B.

AU - Duk, V.

AU - Fascianelli, V.

AU - Fry, J. R.

AU - Gonnella, F.

AU - Goudzovski, E.

AU - Henshaw, J.

AU - Husek, T.

AU - Iacobuzio, L.

AU - Kenworthy, C.

AU - Lazzeroni, C.

AU - Lurkin, N.

AU - Newson, F.

AU - Parkinson, C.

AU - Raggi, M.

AU - Romano, A.

AU - Sam, C.

AU - Sergi, A.

AU - Sturgess, A.

AU - Swallow, J.

AU - Tomczak, A.

PY - 2025/11/24

Y1 - 2025/11/24

N2 - Results from the study of the rare decays K+ → π+νν¯, K+ → π+μ+μ− and K+ → π+γγ at the NA62 experiment at CERN are interpreted in terms of improved limits for B(K+ → π+X) and coupling parameters of hidden-sector models, where X is a mediator. World-leading limits are achieved for dark photon, dark scalar and axion-like particle models.

AB - Results from the study of the rare decays K+ → π+νν¯, K+ → π+μ+μ− and K+ → π+γγ at the NA62 experiment at CERN are interpreted in terms of improved limits for B(K+ → π+X) and coupling parameters of hidden-sector models, where X is a mediator. World-leading limits are achieved for dark photon, dark scalar and axion-like particle models.

KW - Beyond Standard Model

KW - Fixed Target Experiments

U2 - 10.1007/JHEP11(2025)143

DO - 10.1007/JHEP11(2025)143

M3 - Article

SN - 1126-6708

VL - 2025

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 11

M1 - 143

ER -

Searches for hidden sectors using K+ → π+X decays

Abstract

Keywords

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Projects

KaonToALP - Search for axion-like particle production in kaon decays at CERN-NA62 experiment

H2020_IF_NEWLIGHTSCALAR

FP7_ERC_KaonLepton

Ernest Rutherford Fellowship : Dr Antonio Sergi - Development of the NA62 Detector and Search for New Physics with Kaon Decays

FP7 ERC - UniversaLepto : Test of Lepton Flavour Universality with Kaon Decays

Cite this

Searches for hidden sectors using K⁺ → π⁺X decays