Highlights from DIRAC

by Armando LANARO (CERN-EP)

Monday 17 Dec 2001, 16:30 → 17:30 Europe/Zurich

500/1-001 - Main Auditorium (CERN)

A precise measurement of the lifetime of pionium, a p⁺ p^- bound state, can provide a precise determination of the difference between the pion-pion S-wave scattering lengths with I=0,2, a₀-a₂. The knowledge of meson-meson threshold parameters provides a mean to test low energy QCD predictions, which, for the pion-pion system, have reached a high degree of accuracy. The DIRAC experiment is measuring the lifetime of pionium, of order of some femtoseconds, with a few percent precision. An outline of the experiment and its physics motivation, the description of the measurement method and the presentation of preliminary results from available data, will be the topics of this seminar.

Organiser(s): Ariane Frey / EP Division

Note: * Tea & coffee will be served at 16.00 hrs.