Аннотация:
Using recent BABAR, CMD-3 and SND data, the sum of
$e^+e^- \to 3(\pi^+\pi^-)$,
$2(\pi^+\pi^-\pi^0)$,
$p\bar{p}$, $n\bar{n}$
cross sections is obtained. Unlike
$e^+e^- \to 3(\pi^+\pi^-)$ and
$e^+e^- \to 2(\pi^+\pi^-\pi^0)$ processes,
no structures in total cross section are found near the
$N\bar{N}$ threshold
within the limits of measurement errors.