Properties of vector mesons at finite temperature: Effective Lagrangian approach

We examine the properties of ρ mesons at finite temperature T with the use of an effective chiral Lagrangian. The effective Lagrangian includes vector and axial-vector mesons as massive Yang-Mills fields of the chiral symmetry. It is shown that at the leading order of the temperature the effective mass of the ρ meson is not changed and only a mixing in vector and axial-vector correlators takes place. copyright 1996 The American Physical Society