4-11 July 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Dark matter search results from the COUPP 4 kg bubble chamber

7 Jul 2012, 10:00
15m
Room 216 (Melbourne Convention and Exhibition Centre)

Room 216

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 11. Particle Astrophysics and Cosmology Room 216 - Particle Astrophysics and Cosmology -TR11

Speaker

Dr Russell Neilson (University of Chicago (US))

Description

Data will be reported from the operation of a 4.0 kg CF3I bubble chamber in the 6800 foot deep SNOLAB underground laboratory. The effectiveness of ultrasound analysis in discriminating alpha decay background events from single nuclear recoils has been confirmed. The total exposure was 553 kg-days distributed over three different bubble nucleation thresholds. This observation provides world best direct detection constraints on WIMP-proton spin-dependent scattering for WIMP masses >20 GeV/c^2 and demonstrates significant sensitivity for spin-independent interactions. Updates on progress towards operation of larger scale bubble chambers will also be presented.

Financial Support Justification for Early-Stage Researchers

Due to the high cost and long travel time from Chicago to Melbourne, some financial support would be greatly appreciated.

Primary author

Dr Russell Neilson (University of Chicago (US))

Presentation materials