Bulletin of the American Physical Society
4th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 59, Number 10
Tuesday–Saturday, October 7–11, 2014; Waikoloa, Hawaii
Session 2WL: Computational Nuclear Physics II |
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Chair: James Vary, Iowa State University Room: Kona 4 |
Tuesday, October 7, 2014 2:00PM - 2:30PM |
2WL.00001: Baryon number distribution in lattice QCD Invited Speaker: Keitaro Nagata Recently, Beam Energy Scan experiments have been performed at RHIC to find a first order phase transition line and expected critical endpoint on the QCD phase diagram. Higher moments of hadron multiplicity, such as skewness, kurtosis have been measured. Multiplicity of hadrons are basic quantities to obtain the moments. In this talk, we will study the canonical partition function, which are directly related to the baryon number distribution, in lattice QCD simulations with a canonical formalism. We will calculate the canonical partition function for various temperatures, and apply the Lee-Yang zero analysis to the canonical partition function. [Preview Abstract] |
Tuesday, October 7, 2014 2:30PM - 3:00PM |
2WL.00002: Supercomputing extreme matter created during little bangs Invited Speaker: Swagato Mukherjee The role of supercomputing in revealing the nature of extreme hot-dense matter created during the little bangs of relativistic heavy-ion collisions will be discussed. A brief overview of the recent results, relevant for heavy-ion collision experiments, obtained from ab-initio lattice Quantum Chromodynamics computations at non-zero temperatures and densities will be presented. [Preview Abstract] |
Tuesday, October 7, 2014 3:00PM - 3:30PM |
2WL.00003: Formation of clusters in stable and unstable nuclei explored by antisymmetrized molecular dynamics Invited Speaker: Masaaki Kimura Clustering is one of the elementary degrees-of-freedom of nuclear excitation together with the single-particle and collective mean-field excitations. Owing to the theoretical and experimental developments in the decades, the concept of the nuclear clustering itself is rapidly expanding. In particular, increasing computational power provided an opportunity to extend our knowledge on nuclear clustering. The antisymmetrized molecular dynamics (AMD) is one of the theoretical models which boosted the study of nuclear clustering combined with high performance computing. In this presentation, we discuss frontier issues of nuclear cluster physics, mainly focusing on the latest results obtained by AMD studies. Particular attentions will be paid on the following topics. (1) Evolution of clusters in N$=$Z nuclei. By increasing the excitation energy, a variety of clusters appears. Such examples will be demonstrated in the case of $^{\mathrm{24}}$Mg, $^{\mathrm{28}}$Si and $^{\mathrm{32}}$S. The isoscalar monopole excitation function will be focused as an experimental signature of clustering. (2) Formation of covalent clusters in neutron-rich nuclei. Excess neutrons develop a novel type of clusters with covalent neutrons. Theoretical exploration of covalent states will be discussed. [Preview Abstract] |
Tuesday, October 7, 2014 3:30PM - 4:00PM |
2WL.00004: COFFEE BREAK
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Tuesday, October 7, 2014 4:00PM - 4:30PM |
2WL.00005: Computation of Nuclear Matrix Elements for Double-Beta Decay Invited Speaker: Jonathan Engel Calculations of the nuclear matrix elements that govern neutrinoless double-beta decay carry large uncertainties. The calculations have the potential to improve quickly, however, both because of developments in ab initio many-body theory and energy-density functional theory and because of new computational techniques and resources. I describe the most promising methods for future calculations and discuss the computational issues surrounding them. Preliminary work within several many-body schemes has already been reported or is under way. [Preview Abstract] |
Tuesday, October 7, 2014 4:30PM - 5:00PM |
2WL.00006: Roles of dense matter \& neutrino transfer in core-collapse supernovae Invited Speaker: Kosuke Sumiyoshi |
Tuesday, October 7, 2014 5:00PM - 5:30PM |
2WL.00007: Nucleosynthesis Near Newly Formed Compact Objects Invited Speaker: Luke Roberts The origin of the heavy r-process elements is the biggest unsolved question in our understanding of chemical evolution in the Milky Way. The two most likely scenarios for the formation of the r-process nuclei involve dynamical events in the lives of neutron stars where nuclear physics plays a paramount role: the inner most regions of massive, collapsed stars and the merger of two neutron stars or a neutron star and a stellar mass black hole. In this talk, I will discuss these possible astrophysical sites of the r-process, what theoretical uncertainties exist in these scenarios, and observables that may give us a direct window into the formation of the r-process elements. [Preview Abstract] |
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