Abstract
Decays \( {K}^{+}\to {\mu}^{+}{\nu}_{\mu}\nu \overline{\nu} \) and \( {K}^{+}\to {e}^{+}{\nu}_e\nu \overline{\nu} \) are examined to the leading order in momenta in the framework of Chiral Perturbation Theory. Predictions of the Standard Model for the muon and electron differential energy spectra and branching ratios of K μ3ν and K e3ν are presented.
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ArXiv ePrint: 1605.08077
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Gorbunov, D., Mitrofanov, A. \( {\mathrm{K}}^{+}\to {\mu}^{+}{\nu}_{\mu}\nu \overline{\nu} \) and \( {\mathrm{K}}^{+}\to {\mathrm{e}}^{+}{\nu}_{\mathrm{e}}\nu \overline{\nu} \) decays within the Chiral Perturbation Theory. J. High Energ. Phys. 2016, 39 (2016). https://doi.org/10.1007/JHEP10(2016)039
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DOI: https://doi.org/10.1007/JHEP10(2016)039