On V_ud determination from kaon decays

Details On V_ud determination from kaon decays On V_ud determination from kaon decays

2006-09-04

arxiv.org/abs/hep-ph/0609032v2

JHEP 0702:045,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, no figures, one reference added

Scientific paper

10.1088/1126-6708/2007/02/045

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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