Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1996-08-30
Prog.Theor.Phys. 98 (1997) 631-652
Physics
Nuclear Physics
Nuclear Theory
Revised version. 21 pages + 5 figures. Latex. Prog. Theor. Phys. in press. More discussions added
Scientific paper
10.1143/PTP.98.631
A new QCD sum rule analysis on the spin-isospin averaged $\rho$, $\omega$ and $\phi$ meson-nucleon scattering lengths is presented. By introducing the constraint relation on the the low energy limit of the vector-current nucleon forward scattering amplitude, we get $a_\rho=-0.47\pm 0.05$ fm, $a_\omega=-0.41\pm 0.05$ fm and $a_\phi=-0.15\pm 0.02$ fm, which suggests that these V-N interactions are attractive. It is also proved that the previous studies on the mass shift of these vector mesons in the nuclear medium are essentially the ones obtained from these scattering lengths in the linear density approximation.
Hayashigaki Arata
Koike Yuji
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