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- W3082873485 abstract "A bstract The two kaon factories, KOTO and NA62, are at the cutting edge of the intensity frontier, with an unprecedented numbers of long lived and charged Kaons, ∼ 10 13 , being measured and analyzed. These experiments have currently a unique opportunity to search for dark sectors. In this paper, we demonstrate that searches done at KOTO and NA62 are complementary, both probing uncharted territories. We consider two qualitatively different physics cases. In the first, we analyze models of axion-like-particles (ALP) which couple to gluons or electroweak gauge bosons. In the second, we introduce a model based on an approximate strange flavor symmetry that leads to a strong violation of the Grossman-Nir bound. For the first scenario, we design a new search strategy for the KOTO experiment, K L → π 0 a → 4 γ . Its expected sensitivity on the branching ratio is at the level of 10 − 9 . This demonstrates the great potential of KOTO as a discovery machine. In addition, we revisit other bounds on ALPs from Kaon factories, highlighting the main sources of theoretical uncertainty, and collider experiments, and show new projections. For the second scenario, we show that the model may be compatible with the preliminary analysis of the KOTO-data that shows a hint for New Physics." @default.
- W3082873485 created "2020-09-08" @default.
- W3082873485 creator A5061126453 @default.
- W3082873485 creator A5063930699 @default.
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- W3082873485 date "2020-08-01" @default.
- W3082873485 modified "2023-10-18" @default.
- W3082873485 title "KOTO vs. NA62 dark scalar searches" @default.
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- W3082873485 doi "https://doi.org/10.1007/jhep08(2020)110" @default.
- W3082873485 hasPublicationYear "2020" @default.
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