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On V_ud determination from kaon decays

Mihail V. Chizhov
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Abstract

The pion beta decay pi^+ -> pi^0 e^+ nu proceeds through pure weak vector hadronic currents and, therefore, the theoretical prediction for it is more reliable than for the processes with axial-vector current contribution. For example, recently the pion beta decay has been used for V_ud determination. The main aim of this letter is to point that kaon beta decay K^0 -> K^+(pi^+ pi^0) e^- nu-bar analogously can be used for this purpose.

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Mihail V. Chizhov. 2006-09-21. On V_ud determination from kaon decays. https://doi.org/10.1088/1126-6708%2F2007%2F02%2F045

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