Isospin dependent interactions in RMF & ρNN tensor coupling Introduction ρNN tensor coupling in RMF Some results Summary Wei-Zhou JIANG Collaborators: Y.L.ZHAO, et.al. Shanghai Institute of Applied Physics

Brockmann,Machleidt ， PRC42,1965(1990)

Li Bao-An, PRL88,192701(2002)

RMF

Reveal the relationship between the single neutron separation energy and the trength of the halo neutron–proton HBT. Results show that neutron–proton HBT results are sensitive to binding energy or separation energy. Y.B.Wei, Y.G.Ma, et.al., Exploring the binding energy and separation energy dependences of HBT strength, Phys. Lett. B 586(2004)225

Nuclear Structure Density dependence of the symmetry energy (DDSE) Abundance of information:Binding Energy, Density distribution, Deformations, Excitations, etc More definite: structure information Deficiency ： Nuclei far off  stability ； Insensitivity of DDSE at low density

RMF  NN tensor coupling with A large  NN tensor Coupling: The dispersion-theoretical analysis of the nucleon electromagnetic form factors G.Höler, E.Pietarinen, NPB95(1975) 210; P.Mergell, et.al. NPA596(1996)367 The analysis of the NN scattering G.E.Brown, R.Machleidt, PRC 50(1994)1731 The light cone sum rules S.L.Zhu, PRC59(1999)435

1.Inclusion of isoscalar-isovector coupling: Modify neutron thickness of 208 Pb other than its proton distribution 改变 Pb 的中子而非电荷分布 2.Particularity of light exotic nuclei: Coupling between the neighboring shells of neutron and proton influences the charge distribution; Experimentally yet to be measured 邻近中子质子壳耦合, 对电荷分布影响如何 ? 实验上待测 3.  NN tensor couling: 不改变核物质性质 (RMF) 而影响有限核性质 (1) Influence the properties of finite nuclei without changing those of nuclear matter in RMF (2) The isoscalar-isovector coupling modifies the source term of rho meson (also the tensor coupling) (3)Tensor coupling is relevant to the gradient of the related density

RMF Eqs:

Establish data to data correlation of neutron thickness of 208Pb and nucleon radii of light exotic nuclei At Jefferson Lab Charge distribution measurement at GSI and RIKEN in future

0.35, 0.5, 083 for 2s 1/2 of 22,23,24 O

Model dependence ( NL3, S271) Same saturation density kF=1.30fm-1 Same binding energy per nucleon (16.24MeV) Same and incompressibility (271MeV) But different effective mass: For NL3: 0.59M; for S271 : 0.7M Another Role of rho NN tensor coupling :

26 Ne

Influence on halos

Summary 23,24 O, 25,26 F, 26 Ne 208 Pb with isoscalar-isovector couplings Charge radii of exotic nuclei sensitive to the density dependence of symmetry energy  NN tensor coupling enhances the sensitivity, subject to the 2S 1/2 occupancy  NN tensor coupling reduces the model dependence PLB617(2005)33; PRC(2005) to be published

Acknowledgment 兰州重离子加速器国家实验室理论物理中心 CAS Knowledge Innovation Project No.KJCX2- N11 National Natural Sciences Foundation of China under grant No , Major State Basic Research Development Program under grant No. G

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FUTURE EFFORTS Nuclear structure of exotic nuclei Superheavy nuclei Hypernuclei Neutron stars In thermodynamics