Constraining the density dependence of the symmetry energy in finite nuclei and nuclear matter

1. Constraining the density dependence of the symmetry energy in finitenuclei and nuclear matter Wei-Zhou JIANG Department of Physics, Southeast University Nanjing, China Collaborators：Bao-An Li，Lie-Wen Chen，Yao-Lin Zhao, Zhi-Yuan Zhu，Zhong-Zhou Ren et.al.

2. Enhancement of the sensitivity of observables to the DDSE • Deexcitation energy as a good probe to DDSE • Constraints from model chirality • A new source in modifying the DDSE——CSB • Summary

4. 1. Enhancement of the sensitivity of observables to the DDSE • NN tensor coupling • Increase the density by adding Λ

5. NN tensor coupling with And strange meson included

6. Phys. Lett. B617(05)33

7. Increase the density(1) Multi- Λ hypernuclei Metastable exotic multihypernuclear objects (MEMOs) J.Schaffner, et.al. PRL71(1993)1328; Ann. Phys. (N.Y.) 235 (1994) 35 Multi-Λhypernuclei based on 102Ca EB/A of 102Ca+Λ’s

8. (2) Matter with hyperonization Glendenning, Phys.Rept.342(2001)393;Astrophys. J. 293 (1985) 47 fY=ρY/ρB Jiang, Nucl-th/0609024, PLB 642(06)28

9. 2. Deexcitation energy as a good probe to DDSE Difficult neutron radius measurement for Pb208 at JLab A~190 Ground state: Oblate Superdeformed Secondary minimum(SSM): Prolate Collective excitations: isovector changes

10. Deexcitation energy • Difference of binding energies between the g.s. & SSM • Determined by the difference of potentials • Influenced by the isovector potential and the DDSE

12. FSUGold

13. Odd-odd Au isotopes Almost independent of pairing interactions

14. 3. Constraining with the model chirality • Properties of nucleons and mesons in medium should be constrained by the chiral symmetry and its breaking. • Symmetry energy is dominated by the isovector mesons. • A good candidate is the Walecka model with Brown-Rho scaling: Simple but with chiral limit

15. P.Danielewicz, R.Lacey,W.G.Lynch, Science 298(2002)1592 Pressure of well constructed models Collective flow data from high energy heavy-ion reactions

16. The DDSE Constrained by isospin diffusion data Jiang, Li, Chen, Phys. Lett. B653(07)184

17. 4. A new source in modifying the DDSE——CSB

19. Lowest Order: npe matter at beta equilibrium

21. All orders in RPA

22. Symmetry energy

23. Summary • We proposed a few theoretically sensitive probes to the DDSE. • Deexcitation energy of SSM is a good probe to the DDSE. • Some constraints from chirality were studied. • CSB & the DDSE, the symmetry energy is largely softened at high densities.

24. Thank you!

25. By single-particle property!