Vector Mesons in Nuclear Medium -- an Effective Lagrangian Approach --

Abstract

Effective masses of $\rho$ and $\omega$ mesons in nuclear medium are studied in a hadronic effective theory. Both the pole position and the screening mass decrease in nuclear matter due to the polarization of the nucleon Dirac sea. The physical origin of the decrease is a reduction of the wave function renormalization constant induced by the tensor (vector) interaction of the $\rho$ ($\omega$) with the nucleon. Relation to the results of the QCD sum rules is also discussed.

arXiv commentLaTeX 9 pages, 3 figures are available on request, report UTHEP-276

References in corpus (3)

• QCD Phenomenology based on a Chiral Effective Lagrangian
• Medium Modification to the $\Omega$-Meson Mass in the Walecka Model
• Dirac sea effects in $K^{+}$ scattering from nuclei

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