Effective Vector Meson Masses in a Cutoff Field Theory

Abstract

Based on quantum hadrodynamics with a finite cutoff, the effective masses of vector mesons(ω, ρ) in nuclear medium are calculated. We use a low-energy effective Lagrangian which is obtained by integrating high-energy quantum fluctuations. Although we use an artificial cutoff, the cutoff-dependence can be removed order by order. It is shown that there is a strong correlation between the effective ω-meson mass and the effective nucleon mass at the normal density. It is also found that the effective ρ-meson mass m_ρ^* decreases as density increases. The rate of the decrease becomes smaller at high density. As a result, at the normal density, the m^*_ρ/m_ρis 0.85 \sim 0.95.

15 pages, LateX, 7 eps figures. Email: [email protected]

References in corpus (2)

• Meson-nucleon vertex corrections to the vacuum polarization in the cutoff field theory and tensor coupling
• Vacuum Effects and Compressional Properties of Nuclear Matter in Cutoff Field Theory

Cited by in corpus (1)

• A relation among the effective nucleon mass, the incompressibility and the effective $\sigma$-meson mass in nuclear matter