Bulletin of the American Physical Society
2008 APS April Meeting and HEDP/HEDLA Meeting
Volume 53, Number 5
Friday–Tuesday, April 11–15, 2008; St. Louis, Missouri
Session S2: American Particle Physics in the Coming Era II |
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Sponsoring Units: DPF Chair: Robert Cahn, Lawrence Berkeley National Laboratory Room: Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), St. Louis D |
Monday, April 14, 2008 1:30PM - 2:06PM |
S2.00001: Exploring the Neutrino Questions Invited Speaker: Neutrinos are the most elusive of the fundamental constituents of matter and are responsible for the biggest particle physics discovery of the past decade: contrary to theoretical expectations, it is now established that neutrinos have mass. I'll review what we have learned about neutrino properties, and describe a list of known unknowns that can only be addressed by several distinct next-generation neutrino experiments. I'll also discuss what we have learned about the new physics unlocked by neutrino experiments, and speculate about what we can hope to learn in the near future. [Preview Abstract] |
Monday, April 14, 2008 2:06PM - 2:42PM |
S2.00002: DUSEL and its Physics Program Invited Speaker: The recent discoveries by the SNO, KamLAND, and Super-K collaborations; the precision measurements at MINOS, Borexino, and K2K; and the significant increases in dark matter sensitivities reported by CDMS and Xenon10, have highlighted the increasing world-wide interest in underground physics, astrophysics and other fields of science that require deep underground laboratory and research facilities. The National Science Foundation has embarked on the third and fourth stages of a program to establish a world-class, multi-disciplinary deep underground science and engineering laboratory - DUSEL. The first stage of this effort to assess the scientific drivers was completed with the release of Deep Science (http://www.deepscience.org/) and the associated Town Meetings (http://cosmology.berkeley.edu/DUSEL/Town\_meeting\_DC07/) in November 2007. I shall review this report's finding on the scientific motivations for DUSEL, the documented shortage of underground space to pursue the experiments, and additional facility requirements that influence DUSEL's design. The NSF's DUSEL Review Panel in July 2007 selected the former Homestake mine in South Dakota as the prime site to be developed for an international world-class research facility. I shall review the Homestake facility plans (http://www.lbl.gov/nsd/homestake/) including the near-term experimental program hosted by the state-sponsored Sanford Laboratory and the plans for the development of the entire site as a multidisciplinary user facility with depths extending to 8000 feet below ground. Our plans for DUSEL as an NSF Major Research Equipment and Facilities Construction proposal would provide funding for the facility as well as significant Initial Suite of Experiments (ISE). The Initial Suite of Experiments would be constructed concurrently with the facility as early as 2011 or 2012. I shall review a number of candidate experimental programs being considered for DUSEL's Initial Suite of Experiments of particular interest to the particle physics community including: a comprehensive long baseline neutrino program, nucleon decay experiments, dark matter searches, neutrinoless double beta decay experiments as well as solar and geoneutrino measurements and potential gravity wave and n-nbar oscillation experiments. [Preview Abstract] |
Monday, April 14, 2008 2:42PM - 3:18PM |
S2.00003: The Future US Cosmology Program Invited Speaker: There is now a standard cosmological theory that is consistent with all extant data, including for the first time cosmological measurements of very high accuracy. The ``concordance model,'' however, contains three elements with weak theoretical motivation and no laboratory verification: a dark matter particle, a non-zero cosmological constant, and a field to drive inflation. Where do we go from here? I will describe observational opportunities that exist in several areas: (1) Testing General Relativity on large scales, where it underlies the concordance model; (2) Detecting signals that originate during cosmological epochs that are presently unobserved: gravity waves from the early Universe, and 21-cm signals from redshifts 6--50; (3) High-precision measures of the expansion and matter-clustering history of the Universe, to gain further information on the ``dark'' phenomena; (4) More detailed understanding of the paradigm that galaxies form by collapse of baryons into dark-matter potential wells. I will describe US facilities proposed to exploit these observational opportunities. [Preview Abstract] |
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