dorsal/arxiv
View Schema$J/\psi$-Nucleon Scattering Length and In-medium Mass Shift of $J/\psi$ in QCD Sum Rule Analysis
| Authors | Arata Hayashigaki |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9811092 |
| URL | https://arxiv.org/abs/nucl-th/9811092 |
| DOI | 10.1143/PTP.101.923 |
| Journal | Prog.Theor.Phys. 101 (1999) 923-935 |
Abstract
We calculate the spin-averaged $J/\psi$-nucleon scattering length $a_{J/\psi}$ by directly applying QCD sum rule to $J/\psi$-$N$ forward scattering amplitude. Our result $a_{J/\psi} = - 0.10 \pm 0.02$ fm, predicts the possibility of bound states with nuclei, though the force is weaker than that of the light vector mesons ($\rho,\omega,\phi$)-$N$ cases. Up to dimension-4 gluonic operators, we evaluate the scattering length with twist-2 contribution, which increases the absolute value of the scattering length about 30%. If we apply $a_{J/\psi}$ to the effective mass of $J/\psi$ in nuclear matter on the basis of the linear density approximation, it shows very slight decrease ($4 \sim 7$ MeV) at normal matter density.
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"abstract": "We calculate the spin-averaged $J/\\psi$-nucleon scattering length\n$a_{J/\\psi}$ by directly applying QCD sum rule to $J/\\psi$-$N$ forward\nscattering amplitude. Our result $a_{J/\\psi} = - 0.10 \\pm 0.02$ fm, predicts\nthe possibility of bound states with nuclei, though the force is weaker than\nthat of the light vector mesons ($\\rho,\\omega,\\phi$)-$N$ cases. Up to\ndimension-4 gluonic operators, we evaluate the scattering length with twist-2\ncontribution, which increases the absolute value of the scattering length about\n30%. If we apply $a_{J/\\psi}$ to the effective mass of $J/\\psi$ in nuclear\nmatter on the basis of the linear density approximation, it shows very slight\ndecrease ($4 \\sim 7$ MeV) at normal matter density.",
"arxiv_id": "nucl-th/9811092",
"authors": [
"Arata Hayashigaki"
],
"categories": [
"nucl-th"
],
"doi": "10.1143/PTP.101.923",
"journal_ref": "Prog.Theor.Phys. 101 (1999) 923-935",
"title": "$J/\\psi$-Nucleon Scattering Length and In-medium Mass Shift of $J/\\psi$ in QCD Sum Rule Analysis",
"url": "https://arxiv.org/abs/nucl-th/9811092"
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