Analytical approaches to the calculation of f+(0)
classification
✦ hep-ph
hep-exhep-lat
keywords
analyticalapproachescalculationconstitutedatadecaysdeterminationdominated
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Kl3 decays constitute, at present, the golden modes to extract |Vus| from experimental data. Its incertitude is dominated by the theoretical error in the determination of the vector form factor at zero transfer of momentum. I review the most relevant analytical approaches for the calculation of this parameter.
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