Bulletin of the American Physical Society
APS April Meeting 2014
Volume 59, Number 5
Saturday–Tuesday, April 5–8, 2014; Savannah, Georgia
Session E2: Invited Session: Dark Matter - WIMPs |
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Sponsoring Units: DAP DPF Chair: Tracy Slatyer, Massachusetts Institute of Technology Room: Chatham Ballroom A |
Saturday, April 5, 2014 3:30PM - 4:06PM |
E2.00001: Direct Detection Searches for WIMPs Invited Speaker: Blas Cabrera We have seen remarkable progress in direct detection searches for dark matter in the form of weakly interacting particles or WIMPs. Existing experiments using diverse technologies have set convincing limits for WIMPs under the spin independent interaction framework and have ruled out much of the phase space suggested by supersymmetric models. Liquid xenon experiments have provided the best limits for masses above 6 GeV/c$^2$, with cryogenic detectors and bubble chambers setting the best limits for lighter mass WIMPs. In tension with the liquid xenon experiments are hints of signals and a claimed detection in the light WIMP mass sector. A number of theoretical ideas are consistent with light mass WIMPs, and a general approach, which probes all possible interactions between WIMPs and nucleons, stresses the need for a variety of target nuclei with the lowest possible thresholds to broadly cover the possibilities. As discussed extensively in P5 meetings, the down selection process for the second generation experiments (G2) will determine the progress over the next decade. As a community, we have asked the agencies for significant additional funds to be identified so that several G2 experiments can move forward and R\&D on others continue. We need to continue this important search aggressively until we find WIMPs or reach the natural floor where the solar and atmospheric neutrinos become an irreducible background. [Preview Abstract] |
Saturday, April 5, 2014 4:06PM - 4:42PM |
E2.00002: Indirect detection of Particle Dark Matter with gamma rays - status and perspectives Invited Speaker: Jan Conrad In this contribution I review the present status and discuss some prospects for indirect detection of dark matter with gamma rays. Thanks mainly to the Fermi Large Area Telescope (Fermi-LAT), searches in gamma-rays have reached sensitivities that allow to probe the most interesting parameter space of the weakly interacting massive particles (WIMP) paradigm. This gain in sensitivity is naturally accompanied by a number of detection claims or indications. At WIMP masses above roughly a TeV current Imaging Air Cherenkov Telescopes (HESS, VERITAS, MAGIC) become more sensitive than the Fermi-LAT, the most promising recent development being the first light for the second phase HESS~II telescope with significantly lower energy threshold. Predictions for the next generation air Cherenkov telescope, Cherenkov Telescope Array (CTA), together with forecasts on future Fermi-LAT constraints arrive at the exciting possibility that the cosmological benchmark cross-section could be probed from masses of a few GeV to a few TeV. Consequently, non-detection would pose a challenge to the WIMP paradigm, but the reached sensitivities also imply that--optimistically--a detection within the next decade is in the cards. Time allowing, I will comment on complementarity between the different approaches to WIMP detection. [Preview Abstract] |
Saturday, April 5, 2014 4:42PM - 5:18PM |
E2.00003: Indirect Detection Searches for WIMPs with Neutrinos Invited Speaker: Carsten Rott Dark Matter could be detected indirectly through the observation of neutrinos produced in dark matter self-annihilations or decays. Searches for such neutrino signals have resulted in stringent constraints on the dark matter self-annihilation cross section and the scattering cross section with matter. In recent years these searches have made significant progress in sensitivity through new search methodologies, new detection channels, and through the availability of rich datasets from neutrino telescopes and detectors, like IceCube, ANTARES, Super-Kamiokande, etc. This talk will review recent experimental results and put them in context with respect to other direct and indirect dark matter searches. The prospects of dark matter discovery will be evaluated and the impact of future detectors, including PINGU and Hyper-Kamiokande, discussed. [Preview Abstract] |
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