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 E5: Computational Nuclear Physics |
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Sponsoring Units: DNP GHP Chair: Curtis Meyer, Carnegie Mellon University Room: Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), Promenade C |
Saturday, April 12, 2008 3:30PM - 4:06PM |
E5.00001: Hadron Physics Computations in Lattice QCD Invited Speaker: Progress in extracting excited-state baryon and mesons masses in lattice QCD using large sets of spatially-extended operators is presented. The use of stochastic estimates of all-to-all quark propagators with variance reduction techniques is described. Such techniques are crucial for incorporating multi-hadron operators into the correlation matrices. The current status of form factor and structure function computations is also reviewed. [Preview Abstract] |
Saturday, April 12, 2008 4:06PM - 4:42PM |
E5.00002: Modeling Type Ia Supernova Explosions Invited Speaker: Type Ia Supernovae are one class of bright stellar explosions that are distinguished by a lack of hydrogen in the observed spectra. The most widely accepted scenario is a thermonuclear runaway occurring in a C/O white dwarf that has gained mass from a companion star. The details of the explosion mechanism are incompletely understood, and at present there are competing models that differ in the details of the initial conditions and the nature of the thermonuclear burning. I will present an overview of proposed mechanisms for the explosion and describe the requisite physics for each. Many scenarios invoke a deflagration born near the center of the white dwarf, and the subsequent evolution of the fireball sensitively depends on the relative size of the ignition point and its location. I will describe the flame and ash nuclear energetics and demonstrate that for the case of rising bubbles, featured in some explosion scenarios, the bubble evolution depends sensitively on the nuclear physics included in the models. [Preview Abstract] |
Saturday, April 12, 2008 4:42PM - 5:18PM |
E5.00003: Nucleon structure study using a polarized $^3$He target Invited Speaker: Due to the unique ground state spin structure of the $^3$He nucleus, polarized $^3$He nuclear targets have been used widely in experiments ranging from measurements of the neutron electric and magnetic form factors to the study of the neutron spin structure. In this talk, I will highlight some of the recent results and also discuss upcoming experiments. Particularly, I will discuss the upcoming neutron transversity experiment in Hall A at Jefferson Lab using a vertically polarized $^3$He target and the planned polarized Compton scattering experiment from a polarized $^3$He target at the HI$\gamma$S facility located at the Duke Free Electron Laser Laboratory using the circularly polarized photons. All these experiments benefit greatly from theoretical developments in calculating the three-body system. The work is supported in part by a U.S. Department of Energy grant DE-FG02-03ER41231. [Preview Abstract] |
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