MOMENTUM DEPENDENCE OF THE RHO-OMEGA-MIXING AMPLITUDE IN A HADRONIC MODEL

被引：63

作者：

PIEKAREWICZ, J ^{[1
]}

WILLIAMS, AG ^{[1
]}

机构：

[1] FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA

来源：

PHYSICAL REVIEW C | 1993年 / 47卷 / 06期

关键词：

D O I：

10.1103/PhysRevC.47.R2462

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We calculate the momentum dependence of the rho-omega mixing amplitude in a purely hadronic model. The basic assumption of the model is that the mixing amplitude is generated by NNBAR loops and thus driven entirely by the neutron-proton mass difference. The value of the amplitude at the omega-meson point is expressed in terms of only the NNomega and NNrho coupling constants. Using values for these couplings constrained by empirical two-nucleon data we obtain a value for the mixing amplitude in agreement with experiment. Extending these results to the spacelike region, we find a rho-omega contribution to the NN interaction that is strongly suppressed and opposite in sign relative to the conventional contribution obtained from using the constant on-shell value for the mixing amplitude.

引用

页码：R2462 / R2466

页数：5

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