Effects of Superheavy Quarks and Leptons in Low-Energy Weak Processes KL-> Formula, K+-> + Formula and K0 Formula0

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ID: 296506
1981
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Abstract
We investigate potentially important effects due to the existence of superheavy quarks and leptons of the sequential type in higher-order weak processes at low energies. The second-order ΔS≠0 neutral-current processes KL→µµ, K+→π+νν and KL-KS mass difference are analysed allowing for fermions of masses comparable to or larger than the weak-boson mass in the Kobayashi-Maskawa scheme and in the general sequential scheme with an arbitrary number of generations. Possible connection between heavy-quark masses and light-heavy quark mixing are also examined. The requirement that the rare decay processes such as KL→µµ and K+→π+νν be absent up to order αGF yields a rather stringent bound on the magnitude of light-heavy quark mixing: Such mixing has to be less than mW/mQuark times a factor much smaller than unity.
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Authors T. Inami, Chin Seong Lim
Journal progress of theoretical physics
Year 1981
DOI
10.1143/ptp.65.297
URL
https://academic.oup.com/ptp/article-pdf/65/1/297/5252099/65-1-297.pdf
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