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

The NA62 Collaboration; M. Raggi; F. Brizioli; Helen F Heath; Ryan F Page; J. Swallow; Stoyan M Trilov; et al

doi:10.1007/JHEP11(2025)143

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

The NA62 Collaboration, M. Raggi^*, F. Brizioli^*, Helen F Heath, Ryan F Page, J. Swallow^*, Stoyan M Trilov, et al

^*Corresponding author for this work

School of Physics

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

Abstract

Results from the study of the rare decays K⁺ → π⁺vv^-, 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

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abstract = "Results from the study of the rare decays K+ → π+vv-, 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.",

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AU - The NA62 Collaboration

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AU - Brizioli, F.

AU - Heath, Helen F

AU - Page, Ryan F

AU - Swallow, J.

AU - Trilov, Stoyan M

AU - al, et

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N2 - Results from the study of the rare decays K+ → π+vv-, 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+vv-, 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.

U2 - 10.1007/JHEP11(2025)143

DO - 10.1007/JHEP11(2025)143

M3 - Article (Academic Journal)

SN - 1029-8479

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JO - Journal of High Energy Physics

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