2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192903The calculational precision of $\ee\to\tautau$ and $\ee\to\mumu$ production cross-sections in electron-positron annihilations at \roots = 10.58 \gev are studied for the \kk Monte Carlo simulation program. We determine $σ(\ee\to\tautau) = (0.919 \pm 0.003) \nb$ and $σ(\ee\to\mumu) = (1.147 \pm 0.005) \nb$, where the error represents the precision of the calculation.7 pages, 3 tables, 1 figure (published in Physical Review D 77, 054012 (2008))High Energy Physics - Phenomenologytext