7-9 April 2014
Royal Holloway, University of London
Europe/London timezone
Institute of Physics 2014 Joint High Energy Particle Physics and Astro Particle Physics Groups Annual Meeting

Is there evidence for a Dark Matter signal in CoGeNT data?

8 Apr 2014, 13:00
15m
Room D (Windsor Building)

Room D

Windsor Building

contributed talk Particle Astrophysics, Current and Future Parallel 1D

Speaker

Jonathan Davis (IPPP, Durham University)

Description

The CoGeNT collaboration claim to have observed a signal of light Dark Matter scattering off nuclei in their detector, to a significance of approximately 2.5 sigma. I will critically assess these recent, and earlier, claims. I present a Bayesian analysis of the 1136 live days CoGeNT data, with particular focus on the removal of surface events through the use of nuisance parameters. I derive statistically robust confidence intervals using CoGeNT data, which fully incorporate this uncertainty, and show that the claims of signal in CoGeNT data are premature.

Primary author

Jonathan Davis (IPPP, Durham University)

Presentation Materials