dorsal/arxiv
View SchemaVector mesons in nuclear medium with small three momentum, a QCD sum rule approach
| Authors | Su Houng Lee, Hungchong Kim |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9806078 |
| URL | https://arxiv.org/abs/nucl-th/9806078 |
| DOI | 10.1016/S0375-9474(98)00512-0 |
| Journal | Nucl.Phys. A642 (1998) 165-170 |
Abstract
Using the QCD Operator Product Expansion, we derive the real part of the transverse and longitudinal vector vector correlation function with the $\rho,\omega$ quantum numbers to leading order in density and in ${\bf q}^2$ at $-\omega^2\to \infty $. To dimension 6, only twist-2 and 4 operators contribute. These OPE, through the energy dispersion relation, provide model independent constraints for the ${\bf q}$ dependence of the vector meson spectral density in nuclear medium. We further make a QCD sum rule type of analysis to extract the momentum dependence of the vector meson dispersion relation in medium. The contributions from twist-2 operators are added up to infinite order to check the validity of the OPE at the relevant Borel window.
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"abstract": "Using the QCD Operator Product Expansion, we derive the real part of the\ntransverse and longitudinal vector vector correlation function with the\n$\\rho,\\omega$ quantum numbers to leading order in density and in ${\\bf q}^2$ at\n$-\\omega^2\\to \\infty $. To dimension 6, only twist-2 and 4 operators\ncontribute. These OPE, through the energy dispersion relation, provide model\nindependent constraints for the ${\\bf q}$ dependence of the vector meson\nspectral density in nuclear medium. We further make a QCD sum rule type of\nanalysis to extract the momentum dependence of the vector meson dispersion\nrelation in medium. The contributions from twist-2 operators are added up to\ninfinite order to check the validity of the OPE at the relevant Borel window.",
"arxiv_id": "nucl-th/9806078",
"authors": [
"Su Houng Lee",
"Hungchong Kim"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/S0375-9474(98)00512-0",
"journal_ref": "Nucl.Phys. A642 (1998) 165-170",
"title": "Vector mesons in nuclear medium with small three momentum, a QCD sum rule approach",
"url": "https://arxiv.org/abs/nucl-th/9806078"
},
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