LABORATORI NAZIONALI DI FRASCATI
h. 15:00 - Auditorium B. Touschek - Speaker: A. Pullia (U. Milano Bicocca) abstract In this project we want investigate eventual signals of relic particles from the Big-Bang, corresponding to the so called Cold Dark Matter. These particles probably have not strong and electromagnetic interactions; a well suited hypothesis is that they can be WIMPs particles (Weakly Interacting Massive Particles) with high mass (of the order of 100 GeV or a few TeV); in this case they could interact only weakly with atomic nuclei, producing their recoils that can be detected. Different techniques were used up to now for this kind of research: for instance the use of bolometric detectors (Ge or Si) or the use of liquid Argon or Xenon providing both Ionization and Scintillation signals . In this project we propose to use an alternative technique: a continuously sensitive Bubble Chamber weakly superheated. Results obtained by the COUPP Collaboration (Fermilab) will be reviewed.

DATA: 18-03-2008