Abstract
Vector-axial-vector mixing at finite temperature is reexamined from the viewpoint of a chiral rotation on the chiral SU(2) L × SU(2) R SU(2) V manifold. Using this idea, we discuss the possibility of observing a temperature dependent mass-shift in dilepton production from hot hadronic matter. It is shown that a new peak or bump corresponding to the axial-vector meson appears in addition to the ordinary ones due to vector mesons.
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