Conveners
DM III
- Andrew Zentner (University of Pittsburgh)
David Tran
(University of Minnesota)
07/05/2013, 16:30
We discuss aspects of indirect detection of decaying dark matter and present updated fits to the parameter space in light of the recent AMS-02 measurements of the positron fraction. Leptonic dark matter decay modes can induce higher-order decays involving monoenergetic photons, which may be observed as gamma-ray lines. We examine the resulting interplay between cosmic-ray and gamma-ray...
Chris Jackson
(University of Texas at Arlington)
07/05/2013, 16:45
As direct and indirect dark matter detection experiments continue to place stringent constraints on WIMP masses and couplings, it becomes imperative to expand the scope of the search for particle dark matter by looking in new and exotic places. One such place may be the core of active galactic nuclei where the density of dark matter is expected to be extremely high. Recently, several groups...
Aravind Natarajan
(Carnegie Mellon University)
07/05/2013, 17:00
I use the recent Planck data in combination with WMAP, ACT, and SPT to place bounds on dark matter properties. I show that light dark matter models favored by some direct detection experiments are strongly constrained by CMB observations. I will also discuss how future polarization data from Planck will improve these bounds.
Eric Braaten
(Ohio state University)
07/05/2013, 17:30
The dark matter annihilation rate at small relative velocities can be amplified by a large boost factor using various mechanisms, including Sommerfeld enhancement, resonance enhancement, and Breit-Wigner enhancement. These mechanisms all involve a resonance near the threshold for a pair of dark matter particles. We point out that if the resonance is in the S-wave channel, the mechanisms are...
Dr
Haipeng An
(Perimeter Institute)
07/05/2013, 18:00
Based on my recent work with Maxim Pospelov and Josef Pradler, http://arxiv.org/abs/1302.3884, I will talk about the stellar production of vector states V within the minimal model of "dark photons". I will show that when the Stuckelberg mass of the dark vector becomes smaller than plasma frequency, the emission rate is dominated by the production of the longitudinal modes of V, and scales as...
Sean Tulin
(University of Michigan)
07/05/2013, 18:15
Although collisionless dark matter (CDM) has been highly successful in explaining the large scale structure of the Universe, its success remains unclear on smaller scales. Observations of dwarf galaxies and Milky Way satellites show notable and long-standing disagreements compared to predictions from numerical CDM simulations. This discrepancy can be solved if dark matter is not...
