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structure of Proton Halo Nuclei

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Structure of Proton Halo Nuclei

Resonance properties from a coupled channel meson exchange model

CCAsT“放射性核束物理”研讨会

作者： s.krewald F.Grümmer Institut für Kernphysik Forschungszentrum Jülich GmbHD-52425 JülichGermany

The ground state properties of proton-rich nuclei in the 2sld shellare investigated by the relativistic mean-field theory(RMF)includingnonlinear σ and ω *** results of the calculations predict thatthere are one proton halo in P and only two proton halos *** ground state properties of their mirror nuclei and thecondition of the formation of proton halo are also discussed in presentwork.

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Chinese Physics C 2009年第12期33卷 1273-1278页

作者： M. Dring C. Hanhart 黄飞 s. krewald U.-G. Meiβner Institut fr Kernphysik and Jlich Center for Hadron Physics Forschungszentrum Jlich D-52425 JlichGermany Institute for Advanced simulation Forschungszentrum Jlich D-52425 JlichGermany Department of Physics and Astronomy University of Georgia Athens Georgia 30602 USA Helmholtz-Institut fr strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics Universitt Bonn Nuβallee 14-16 D-53115 Bonn Germany

In this talk, I present the results on the pole structure of pion-nucleon scattering in an analytic model based on meson exchange. The analytic properties of scattering amplitudes provide important information. Besides the cuts, the poles and zeros on the different Riemann sheets determine the global behavior of the amplitude on the physical axis. Pole positions and residues allow for a parameterization of resonances in a well-defined way, free of assumptions for the background and energy dependence of the resonance part. This is a necessary condition to relate resonance contributions in different reactions.

关键词： pion-nucleon scattering meson exchange model analytic structure of the scattering amplitude

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strategies for baryon resonance analysis

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Chinese Physics C 2009年第12期33卷 1127-1131页

作者： M. Dring C. Hanhart 黄飞 s. krewald U.-G. Meiβner Institut fr Kernphysik and Jlich Center for Hadron Physics Forschungszentrum Jlich D-52425 Jlich Germany Institute for Advanced simulation Forschungszentrum Jlich D-52425 Jlich Germany Department of Physics and Astronomy University of Georgia Athens Georgia 30602 USA Helmholtz-Institut fr strahlen-und Kernphysik (Theorie) and Bethe Center for Theoretical Physics Universitt Bonn Nuβallee 14-16 D-53115 Bonn Germany

The analytic properties theoretical investigations of baryon of scattering amplitudes provide a meeting point for experimental and resonances. Pole positions and residues allow for a parameterization of resonances in a well-defined way which relates different reactions. The recent progress made within the Jiilich model is summarized.

关键词： pion-nucleon scattering meson exchange model analytic structure of the scattering amplitude

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Forward pion-nucleon charge exchange reaction and Regge constraints

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Chinese Physics C 2009年第12期33卷 1318-1322页

作者：黄飞 A. sibirtsev s. krewald C. Hanhart J. Haidenbauer U.-G. Meiβner Department of Physics and Astronomy University of Georgia Athens Georgia 30602 USA Helmholtz-Institut fr strahlen-und Kernphysik und Bethe Center for Theoretical Physics Universitt Bonn D-53115 Bonn Germany Excited Baryon Analysis Center Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA Institut fr Kernphysik and Jlich Center for Hadron Physics Forschungszentrum Jlich D-52425 Jlich Germany Institute of Advanced simulation Forschungszentrum Jlich D-52425 Jlich Germany

We present our recent study of pion-nucleon charge exchange amplitudes above 2 GeV. We analyze the forward pion-nucleon charge exchange reaction data in a Regge model and compare the resulting amplitudes with those from the Karlsruhe-Helsinki and George-Washington-University partial-wave analyses. We explore possible high-energy constraints for theoretical baryon resonance analyses in the energy region above 2 GeV. Our results show that for the pion-nucleon charge exchange reaction, the appropriate energy region for matching meson-nucleon dynamics to diffractive scattering should be around 3 GeV for the helicity flip amplitude.

关键词： pion-nucleon interaction Regge model

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skyrme势与A=18核的低能谱计算

高能物理与核物理 1985年第5期 586-593页

作者：袁竹书沈永平王炎森裘志洪郭子斯复旦大学美国纽约州立大学石溪分校国防科技大学

本文在Kuo,Lee和Latcliff的有效势折线图展开理论框架的基础上,尝试采用skyrme势计算了18O及18F的低能级。计算结果表明,无论是采用Vautherin和Brink提供的skyrme势参数还是采用krewald等改进的skyrme势参数,用于开壳核的计算结果都不好。

关键词：粒子波函数 A=18 有效势 KLR 能谱 A skyrme 价核子势参数本征值方程二阶计算公式折迭表面缺陷单粒子态理论框架谐振子弹簧振子模型空间折线图相互作用图