dorsal/arxiv
View SchemaJ/psi and eta_c in the nuclear medium: QCD sum rule approach
| Authors | Frank Klingl, Sungsik Kim, Su Houng Lee, Philippe Morath, Wolfram Weise |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9811070 |
| URL | https://arxiv.org/abs/nucl-th/9811070 |
| DOI | 10.1103/PhysRevLett.82.3396 |
| Journal | Phys.Rev.Lett.82:3396-3399,1999; Erratum-ibid.83:4224,1999 |
Abstract
We investigate the masses of the lowest c\bar{c} states, the J/psi and eta_c, in nuclear matter using QCD sum rules. Up to dimension four, the differences between the operator product expansions in vacuum and in medium arise from the density-dependent change in the gluon condensate and from a new contribution proportional to the nucleon expectation value of the twist-2 gluon operator. Both terms together give an attractive shift of about 5-10 MeV to the J/psi and eta_c masses in nuclear matter.
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"abstract": "We investigate the masses of the lowest c\\bar{c} states, the J/psi and eta_c,\nin nuclear matter using QCD sum rules. Up to dimension four, the differences\nbetween the operator product expansions in vacuum and in medium arise from the\ndensity-dependent change in the gluon condensate and from a new contribution\nproportional to the nucleon expectation value of the twist-2 gluon operator.\nBoth terms together give an attractive shift of about 5-10 MeV to the J/psi and\neta_c masses in nuclear matter.",
"arxiv_id": "nucl-th/9811070",
"authors": [
"Frank Klingl",
"Sungsik Kim",
"Su Houng Lee",
"Philippe Morath",
"Wolfram Weise"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevLett.82.3396",
"journal_ref": "Phys.Rev.Lett.82:3396-3399,1999; Erratum-ibid.83:4224,1999",
"title": "J/psi and eta_c in the nuclear medium: QCD sum rule approach",
"url": "https://arxiv.org/abs/nucl-th/9811070"
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