High-Energy Physics & RIKEN Theory Seminar

"A Dark Matter Explanation of the Fermi, PAMELA, and WMAP Results"

Presented by Lisa Goodenough, New York University

Wednesday, April 7, 2010, 2:00 pm — Small Seminar Room, Bldg. 510

Multiple lines of evidence indicate an anomalous injection of high-energy electrons and positrons in the Galactic halo. PAMELA has measured a sharp rise in the positron fraction up to 80 GeV. Fermi has found a hardening of the total electronic cosmic ray spectrum above 100 GeV with a break confirmed by HESS at around 1 TeV. Excess microwaves toward the Galactic center in the WMAP data (the WMAP "haze") are consistent with hard synchrotron radiation from a population of 10-100 GeV electrons and positrons. A recently analysis of the Fermi gamma-ray sky suggests that there is a gamma-ray counterpart to the microwave haze in the Galactic Center. I will explain how dark matter annihilations, dominantly through leptonic modes, either directly or through a new light boson, can provide a consistent explanation of all of these data.

Hosted by: Ruth Van der Water

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