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
6251 | INT/EXT | Events Calendar
Not all computers/devices will add this event to your calendar automatically.
A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.
Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.