Bulletin of the American Physical Society
3rd Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 54, Number 10
Tuesday–Saturday, October 13–17, 2009; Waikoloa, Hawaii
Session AB: Nuclear Physics: Highlights and Prospects II |
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Chair: Hideyuki Sakai, University of Tokyo Room: Monarchy Ballroom |
Wednesday, October 14, 2009 11:00AM - 11:45AM |
AB.00001: New Aspects of Nuclear Structure Invited Speaker: In recent years, more exotic nuclei have been studied, with unexpected features and their theoretical explanations. I shall sketch some of them. Over the past ten years, our understanding and treatment of the nuclear forces, two-, three- and n-body, have become deeper and more precise, in a closer way with QCD. At the same time, the effects of nuclear force on exotic nuclei have been clarified better. The conventional pictures of the nuclear shells, magic numbers, and correlations have been modified considerably. For instance, the shell structure of exotic nuclei are different from the one for stable nuclei due to some specific components of the nuclear force, e.g., the tensor force. The modern theory of the nuclear forces supports this picture, and experiments done in the past several years indeed suggest such changes from stable to exotic nuclei. The most striking recent finding is the effect of three-body force. The three-body force has been shown, by ab initio calculations, to increase binding energies. While this is correct, Fijita- Miyazawa three-body force coming from Delta excitation produces characteristic repulsive effects between excess neutrons, affecting binding and shell structure. A good example is exotic oxygen isotopes: the dripline is unusually closer to the stability line, and exotic magic numbers N=14 and 16 have been established experimentally. The underlying origin of these anomalies have remained a puzzle, but we can now solve it in terms of the three-body force. While the mechanism is understood very intuitively, the EFT plays a significant role in the evaluation of three-body force effects. These effects are a general and robust one. Thus, our view over exotic nuclei are being changed, and the interplay between nuclear structure physics and hadron physics should become more crucial in this frontier. [Preview Abstract] |
Wednesday, October 14, 2009 11:45AM - 12:30PM |
AB.00002: The Decades of the Neutrino Invited Speaker: The amount we have learned about neutrinos in the last ten years is truly remarkable. Neutrino mass and mixing is the first major revision in the Standard Model in decades and we are just beginning to understand all the implications. In the meantime the next decade promises even more discoveries. Nuclear physics, experiment and theory, is center stage in the developing neutrino story. I will review where we are and discuss the roadmap for the coming decade. [Preview Abstract] |
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