Pion electromagnetic form factor at finite density
Abstract
Description
In this talk, we introduce an effective chiral action, derived from the instanton QCD vacuum configuration, in order to study the modification of mesonic properties in medium. We present our recent theoretical results on the electromagnetic from factor and rho-meson mass shift at finite density. We observe that the rho-meson mass is dropped by about 10%: m*_rho/m_rho ~ 1-0.12 mu_B/mu_0, which is compatible with that estimated by the QCD sum rule as well as by Brown and Rho.
4 pages, 2 figures, Talk given at the workshop Strangeness in multi-quark systems which was held during 26~28 November, 2007 in Sendai, Japan
4 pages, 2 figures, Talk given at the workshop Strangeness in multi-quark systems which was held during 26~28 November, 2007 in Sendai, Japan