CfA Colloquium Schedule Fall 2012
 4 October 2012

4 October 2012

Speaker: Bernard Sadoulet (UCB)

Title:The Nature of Dark Matter: Where are we?

Abstract:I will attempt to review a very dynamic situation. I will start with the constraints on the nature of dark matter from cosmology, focusing in particular on the dwarfs which remain the main difficulty of the Lambda Cold Dark Matter model. I will then rapidly review what particle physics has to say, in particular after the discovery of a Higgs-like particle. I will then discuss in turn the recent results obtained in the three observation method at our disposal. For the scattering of halo dark matter on a laboratory target ("direct detection"), I will review the recent claims for low mass Weakly Interacting Massive Particles, and the current limit at high mass. I will also describe the current axion searches. I will then discuss the current status of the search for dark matter particle annihilation products ("indirect detection"), in particular the possible signal at 130GeV. Finally, I will review the implications of the absence of large missing energy events at the Large Hadron Collider. For these three detection methods, I will attempt to identify the likely directions of progress in the next few years.

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