Henry W. SobelProfessor, Physics & Astronomy |
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Research Interests |
Super-Kamiokande, K2K/T2K Long Baseline Neutrino Oscillation Experiments | |
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Academic Distinctions |
APS Rossi Prize in Astrophysics (shared) 1989 Asahi Prize in Physics (shared) 1999 Fellow of American Physical Society 1999 |
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Research Abstract |
Professor Sobel earned his B. S. from Rensselaer Polytechnic Institute and his Ph. D. (1968) from Case Institute of Technology. He joined the UCI Physics Department in 1968. My physics interests are focused primarily on tests of conservation laws and studies of fundamental interactions between particles. Historically we have focused on studies of the neutrino and the search for nucleon decay. There is also a significant interest in astrophysics and cosmic rays. My current research consists of the continuation of the Super-Kamiokande experiment and plans for the long baseline neutrino oscillation experiment, T2K. My group is heavily involved in the planning for the new long-baseline neutrino oscillation experiment in Japan, now called T2K. The JAERI and KEK Joint Project -- Japan-Proton Accelerator Research Complex (J-PARC, formerly JHF) is now under construction in Tokai, Japan. Its high-luminosity, 50-GeV proton synchrotron offers the possibility of creating a very intense neutrino beam with extremely attractive features for precision measurements and direct tests of our understanding of neutrino mixing. The multi-detector experiment (T2K) currently under design is likely to be the first neutrino oscillation experiment to discover a non-zero theta13 via appearance of electron neutrinos. It is optimized to detect electron neutrino interactions at the precise energy of maximum muon neutrino disappearance. This experiment will test what seems to be the only small angle in the neutrino mixing matrix. In addition, this experiment will precisely measure muon neutrino disappearance and may find the first evidence that the large theta23 mixing is not fully maximal. A possible second phase of the experiment, with upgraded beam and far detector, may be able to discover leptonic CP violation. In the first phase of this experiment, due to begin in 2009, Super-Kamiokande will be the far detector target. The newly rebuilt SK must be calibrated and understood before the beam begins. I continue to be one of the two U.S. co-spokesmen for the Super-Kamiokande experiment and serve on the executive committee for that experiment. RESEARCH EXPERIENCE: Super-Kamiokande Experiment (US co-spokesman), 1992-present K2K Neutrino Experiment, 1999-present Chooz Reactor Neutrino Experiment 1993-1998 IMB Neutrino Experiment, 1979-1992 Bugey Reactor Neutral Current Experiment 1993-1997 Savannah River Reactor Neutrino Experiments 1969-1993 South African Neutrino Experiment (CASEWITS) 1965-1969 |
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| Publications | •Search for neutrino oscillations on a long base-line at the CHOOZ nuclear power station. M. Apollonio, et. al., The CHOOZ Collaboration. Eur.Phys.J. C27, 331-374 (2003). | |
| •Limit On the Neutrino Magnetic Moment Using 1496 Days of Super- Kamiokande-I Solar Neutrino Data. The Super-Kamiokande Collaboration. Phys.Rev.Lett. 93, 021802 (2004). | ||
| •Evidence for an oscillatory signature in atmospheric neutrino oscillation. The Super-Kamiokande Collaboration, Y. Ashie et al. Phys.Rev.Lett. 93, 101801 (2004). | ||
| •A Measurement of Atmospheric Neutrino Oscillation Parameters by Super-Kamiokande I. The Super-Kamiokande Collaboration, Y. Ashie et al. Phys. Rev. D71, 112005 (2005). | ||
| •Search for Nucleon Decay via Modes Favored by Supersymmetric Grand Unification Models in Super-Kamiokande-I. The Super-Kamiokande Collaboration, K. Kobayashi et al. Phys.Rev.D72:052007,2005 | ||
| •“Reactor Neutrinos”, Th.Lasserre and H.W.Sobel. Comptes Rendus Physique, French Academy of Sciences 6(2005)749-757, (2005). | ||
| •“Solar Neutrino Measurements in Super-Kamiokande-I”, Super-Kamkiokande Collaboration (J. Hosaka et al.), Phys.Rev.D 73, 112001(2006) | ||
| •“Measurement of Neutrino Oscillation by the K2K Experiment”, K2K Collaboration: M.H. Ahn, et.al. Phys. Rev. D 74, 072003(2006). | ||
| • “A Measurement of Atmospheric Neutrino Flux Consistent with Tau Neutrino Appearance”, The Super-Kamiokande Collaboration, Phys. Rev. Lett. 97, 171801(2006). | ||
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Professional Societies |
American Physical Society American Society of Physics Teachers |
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| Link to this profile | http://www.faculty.uci.edu/profile.cfm?faculty_id=2169 | |
| Last updated | 10/13/2007 | |