Antip-D and antip-4He annihilation cross-sections at very low energy

The pD and p He total annihilation cross sections have been measured with the Obelix apparatus at LEAR at, respectively, three and two values of the p incident momentum between 70 MeVrc and 36 MeVrc. The values of the pD annihilation cross section, at such low energies, are in agreement with a surprising result obtained in a recent low statistics measurement of the antiprotonic deuterium K X-rays (M. Augsburger et al., Phys. Lett. B 461(1999)417, see following article), concerning the unexpected narrow width of the antiprotonic deuterium 1s level.