Bulletin of the American Physical Society
2006 APS April Meeting
Saturday–Tuesday, April 22–25, 2006; Dallas, TX
Session Q1: Neutrinos I |
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Sponsoring Units: DAP DPF Chair: George Fuller, University of California, San Diego Room: Hyatt Regency Dallas Landmark A |
Monday, April 24, 2006 1:30PM - 2:06PM |
Q1.00001: Cosmic Microwave Background and Large Scale Structure Measures of Neutrino Mass Invited Speaker: The clustering of matter on the largest, cosmological scales has provided a window on the mass of the particle with the smallest cross-section, the neutrino. This results from the effects of the expected background of relic cosmological neutrinos on clustering from the largest to smallest scales in the linear theory of cosmological structure growth in combination with precision measures of cosmological matter clustering from observations of the cosmic microwave background and from galaxy surveys. I will review the theoretical underpinnings and caveats of the inferred neutrino mass limits from cosmological large scale structure and the status of current observations from the Wilkinson Microwave Anisotropy Probe of the the cosmic microwave background as well as the large scale structure measures from the Sloan Digital Sky Survey. In addition, I will highlight future cosmological probes of neutrino properties. [Preview Abstract] |
Monday, April 24, 2006 2:06PM - 2:42PM |
Q1.00002: Neutrinos and Neutrino Physics: Still Center Stage in Core Collapse Supernovae Invited Speaker: Ascertaining the core collapse supernova mechanism and understanding all of the phenomena associated with such stellar explosions, such as their element synthesis and gravitational wave signatures, neutron star kicks, the spin of pulsars at birth, etc., will require three-dimensional precision models that include realistic neutrino transport, stellar core fluid instabilities, rotation, magnetic fields, a realistic stellar core equation of state for both sub- and super-nuclear densities, and realistic weak interactions. Only in the last decade has supernova modeling broken free from the confines of spherical symmetry. I will review the current state of the art. Even the most fundamental questions remain: How do core collapse supernovae explode? What role do the neutrinos play? While a recent emphasis has been placed on the role of magnetic fields in generating core collapse supernova explosions, the neutrinos still occupy center stage. Moreover, in light of the now experimentally determined fact that neutrinos have mass, neutrino transport in core collapse supernovae takes on a whole new complexity. Previously, neutrino transport was well described by Boltzmann kinetic theory, but now more faithful modeling will require quantum kinetics. The role of neutrino mixing in the core collapse supernova mechanism remains virtually unexplored, with the potential for significant surprises. It is, as I will discuss, one of the frontiers in core collapse supernova theory. Finally, the development of precision three-dimensional supernova models will provide yet another scientific opportunity beyond the chance to ascertain how stars die and produce the elements necessary for life. Together with detailed observations, especially of the neutrino and gravitational wave emissions in the event of a Galactic supernova, detailed supernova models will allow us to use core collapse supernovae as laboratories for fundamental physics. I will discuss some of the possibilities. [Preview Abstract] |
Monday, April 24, 2006 2:42PM - 3:18PM |
Q1.00003: The Neutrino World Invited Speaker: The discovery of neutrino mass has raised very interesting questions about the neutrinos and their connections to the rest of physics and astrophysics. We will discuss these questions and the ideas for answering them through future experiments. Ultimately, one would like to discover the origin of neutrino mass. We will discuss some speculations on this origin. [Preview Abstract] |
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