Nuclear symmetry energy from QCD sum rules

doi:10.13538/j.1001-8042/nst.2013.05.006

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (5): 050506 doi: 10.13538/j.1001-8042/nst.2013.05.006

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

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

Nuclear symmetry energy from QCD sum rules

JEONG Kie Sang* LEE Su Houng

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 doi: 10.13538/j.1001-8042/nst.2013.05.006

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Abstract

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.

Key words: Nuclear symmetry energy, Relativistic mean field theory, QCD sum rule, Twist-4 matrix elements

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Nuclear Science and Techniques

Nuclear symmetry energy from QCD sum rules

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