Kavli Affiliate: Kiyoshi Wesley Masui | Summary:It is shown that 21 cm intensity mapping could be used in the near term to make cosmologically useful measurements. Large scale structure could be detected using existing radio telescopes, or using prototypes for dedicated redshift survey telescopes. This would provide a measure of the mean neutral hydrogen density, […]
Kavli Affiliate: Rafe Schindler | Summary:A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of the exciting science opportunities of the next decade. The Large Synoptic Survey Telescope (LSST) will have an effective aperture of 6.7 meters and an imaging camera […]
Kavli Affiliate: Kiyoshi Wesley Masui | Summary:We present projected constraints on modified gravity models from the observational technique known as 21 cm intensity mapping, where cosmic structure is detected without resolving individual galaxies. The resulting map is sensitive to both BAO and weak lensing, two of the most powerful cosmological probes. It is found that […]
Kavli Affiliate: Ralf Kaehler | Summary:We describe an implementation of compressible inviscid fluid solvers with block-structured adaptive mesh refinement on Graphics Processing Units using NVIDIA’s CUDA. We show that a class of high resolution shock capturing schemes can be mapped naturally on this architecture. Using the method of lines approach with the second order total […]
Kavli Affiliate: Mark Vagins | Summary:This report provides the technical justification for locating a large detector underground in a US based Deep Underground Science and Engineering Laboratory. A large detector with a fiducial mass in the mega-ton scale will most likely be a multipurpose facility. The main physics justification for such a device is detection […]
Kavli Affiliate: Toshitake Kohno | Summary:We consider subgroups of the braid groups which are generated by $k$-th powers of the standard generators and prove that any infinite intersection (with even $k$) is trivial. This is motivated by some conjectures of Squier concerning the kernels of Burau’s representations of the braid groups at roots of unity. […]
Kavli Affiliate: Tomiyoshi Haruyama | Summary:Discussions in the taskforce meetings in the period of Jan.-Mar. 2009 on the technical possibility of the ultracold neutron (UCN) source at the Japan Proton Accelerator Research Complex (J-PARC) is summarized. | Search Query: arXiv Query: search_query=au:”Haruyama Tomiyoshi”&id_list=&start=0&max_results=10Read More
Kavli Affiliate: Mark Schattenburg | Summary:Low-mass pre-main sequence (PMS) stars are strong and variable X-ray emitters, as has been well established by EINSTEIN and ROSAT observatories. It was originally believed that this emission was of thermal nature and primarily originated from coronal activity (magnetically confined loops, in analogy with Solar activity) on contracting young stars. […]
Kavli Affiliate: Masayuki Nakahata | Summary:A high performance distillation system to remove krypton from xenon was constructed, and a purity level of Kr/Xe = $sim 3 times 10^-12$ was achieved. This development is crucial in facilitating high sensitivity low background experiments such as the search for dark matter in the universe. | Search Query: arXiv […]
Kavli Affiliate: Mark Hartz | Summary:Recent measurements of B hadron properties carried out in sqrt(s)=1.96 TeV p/p-bar collisions at the Tevatron are reviewed. Included are measurements of the Bc+ meson lifetime, using J/psi+l+X final states, and the mass, using J/psi+pi final states, a flavor specific measurement of the Bs0 lifetime in Ds+pi+X decays, simultaneous measurements […]