dorsal/arxiv
View SchemaNucleon QCD sum rules in nuclear matter including four-quark condensates
| Authors | E. G. Drukarev, M. G. Ryskin, V. A. Sadovnikova, Th. Gutsche, Amand Faessler |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0401039 |
| URL | https://arxiv.org/abs/nucl-th/0401039 |
| DOI | 10.1103/PhysRevC.69.065210 |
| Journal | Phys.Rev. C69 (2004) 065210 |
Abstract
We calculate the nucleon parameters in nuclear matter using the QCD sum rules approach in Fermi gas approximation. Terms up to 1/q^2 in the operator product expansion (OPE) are taken into account. The higher moments of the nucleon structure functions are included. The complete set of the nucleon expectation values of the four-quark operators is employed. Earlier the lack of information on these values has been the main obstacle for the further development of the approach. We show that the four-quark condensates provide the corrections of the order 20% to the results obtained in the leading orders of the OPE. This is consistent with the assumption about the convergence of the OPE. The nucleon vector self-energy \Sigma_v and the nucleon effective mass m^* are expressed in terms of the in-medium values of QCD condensates. The numerical results for these parameters at the saturation value of the density agree with those obtained by the methods of nuclear physics.
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"abstract": "We calculate the nucleon parameters in nuclear matter using the QCD sum rules\napproach in Fermi gas approximation. Terms up to 1/q^2 in the operator product\nexpansion (OPE) are taken into account. The higher moments of the nucleon\nstructure functions are included. The complete set of the nucleon expectation\nvalues of the four-quark operators is employed. Earlier the lack of information\non these values has been the main obstacle for the further development of the\napproach. We show that the four-quark condensates provide the corrections of\nthe order 20% to the results obtained in the leading orders of the OPE. This is\nconsistent with the assumption about the convergence of the OPE. The nucleon\nvector self-energy \\Sigma_v and the nucleon effective mass m^* are expressed in\nterms of the in-medium values of QCD condensates. The numerical results for\nthese parameters at the saturation value of the density agree with those\nobtained by the methods of nuclear physics.",
"arxiv_id": "nucl-th/0401039",
"authors": [
"E. G. Drukarev",
"M. G. Ryskin",
"V. A. Sadovnikova",
"Th. Gutsche",
"Amand Faessler"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.69.065210",
"journal_ref": "Phys.Rev. C69 (2004) 065210",
"title": "Nucleon QCD sum rules in nuclear matter including four-quark condensates",
"url": "https://arxiv.org/abs/nucl-th/0401039"
},
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