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Constraining the density dependence of the symmetry energy in finite
nuclei and nuclear matter
Wei-Zhou JIANGDepartment of Physics, Southeas
t UniversityNanjing, China
Collaborators: Bao-An Li, Lie-Wen Chen, Yao-Lin Zhao, Zhi-Yuan Zhu, Zhong-Zhou Ren et.al.
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1. Enhancement of the sensitivity of observables to the DDSE
2. Deexcitation energy as a good probe to DDSE
3. Constraints from model chirality
4. A new source in modifying the DDSE——CSB
5. Summary
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NN tensor coupling
• Increase the density
by adding Λ
1. Enhancement of the sensitivity of observables to the DDSE
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NN tensor coupling
with
And strange meson included
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Phys. Lett. B617(05)33
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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
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fY=ρY/ρB
(2) Matter with hyperonization
Glendenning, Phys.Rept.342(2001)393; Astrophys. J. 293 (1985) 47
Jiang, Nucl-th/0609024, PLB 642(06)28
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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
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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
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FSUGold
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Odd-odd Au isotopes
Almost independent of pairing interactions
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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
3. Constraining with the model chirality)(Esym
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P.Danielewicz, R.Lacey,W.G.Lynch, Science 298(2002)1592
Collective flow data from high energy heavy-ion reactions
Pressure of well constructed models
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The DDSE
Constrained by isospin diffusion data
Jiang, Li, Chen, Phys. Lett. B653(07)184
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4. A new source in modifying the DDSE——CSB
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Lowest Order:
npe matter at beta equilibrium
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All orders in RPA
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Symmetry energy
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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.
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Thank Thank you!you!
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By single-particle property!