### 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.

Original language | English |
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Article number | 050506 |

Journal | Nuclear Science and Techniques |

Volume | 24 |

Issue number | 5 |

Publication status | Published - 2013 Oct 20 |

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### All Science Journal Classification (ASJC) codes

- Nuclear Energy and Engineering

### Cite this

*Nuclear Science and Techniques*,

*24*(5), [050506].

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*Nuclear Science and Techniques*, vol. 24, no. 5, 050506.

**Nuclear symmetry energy from QCD sum rules.** / Sang, Jeong Kie; Houng, Lee Su.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Nuclear symmetry energy from QCD sum rules

AU - Sang, Jeong Kie

AU - Houng, Lee Su

PY - 2013/10/20

Y1 - 2013/10/20

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84968853439&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84968853439&partnerID=8YFLogxK

M3 - Article

VL - 24

JO - Nuclear Science and Techniques/Hewuli

JF - Nuclear Science and Techniques/Hewuli

SN - 1001-8042

IS - 5

M1 - 050506

ER -