# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (5): 050506

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2012) •

### Nuclear symmetry energy from QCD sum rules

JEONG Kie Sang*   LEE Su Houng

1. Institute of Physics and Applied Physics, Yonsei University,Seoul 120-749, Korea
• Received:2013-06-27
• Contact: JEONG Kie Sang E-mail:key.s.jeong@gmail.com
• Supported by:

Supported by Korea national researchfoundation (Grants Nos.KRF-2011-0030621 and KRF-2011-0020333)

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JEONG Kie Sang LEE Su Houng. Nuclear symmetry energy from QCD sum rules  .Nuclear Science and Techniques, 2013, 24(5): 050506

Abstract:

We calculated the nucleon self-energies in iso-spin asymmetric nuclear matter and obtained the nuclear symmetry energy by taking difference of these of neutron and proton.We find that the scalar (vector) self-energy part gives a negative (positive) contribution to the nuclear symmetry energy, consistent with the result from relativistic mean-field theories. Also, we found exact four-quark operator product expansion for nucleon sum rule. Among them, twist-4 matrix elements which can be extracted from deep inelastic scattering experiment constitute an essential part in the origin of the nuclear symmetry energy from QCD. Our result also extends early success of QCD sum rule in the symmetric nuclear matter to the asymmetric nuclear matter.