Abstract
We analyze the New Physics sensitivity of a recently proposed method to measure the CP-violating \( \mathcal{B} \)(KS → μ+μ−)ℓ=0 decay rate using KS − KL interference. We present our findings both in a model-independent EFT approach as well as within several simple NP scenarios. We discuss the relation with associated observables, most notably \( \mathcal{B} \)(KL → π0\( \nu \overline{\nu} \)). We find that simple NP models can significantly enhance \( \mathcal{B} \)(KS → μ+μ−)ℓ=0, making this mode a very promising probe of physics beyond the standard model in the kaon sector.
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Dery, A., Ghosh, M. K → μ+μ− beyond the standard model. J. High Energ. Phys. 2022, 48 (2022). https://doi.org/10.1007/JHEP03(2022)048
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DOI: https://doi.org/10.1007/JHEP03(2022)048