Searches for hidden sectors using K$^{+}$→ π$^{+}$X decays
(2025) Journal of High Energy Physics — Vol. 11 (2025)
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- Abstract
- Results from the study of the rare decays $ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $, K$^{+}$ → π$^{+}$μ$^{+}$μ$^{−}$ and K$^{+}$ → π$^{+}$γγ at the NA62 experiment at CERN are interpreted in terms of improved limits for $ \mathcal{B}\left({K}^{+}\to {\pi}^{+}X\right) $ 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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Citations
Cortina Gil, E., Jerhot, J., Minucci, E., Padolski, S., Rumenov Petrov, P., Shaikhiev, A., Volpe, R., NA62, & et al. (2025). Searches for hidden sectors using K$^{+}$→ π$^{+}$X decays. Journal of High Energy Physics, 11. https://doi.org/10.1007/JHEP11(2025)143 (Original work published 2025)