Baryon masses from QCD current correlators at $T\ne 0$

Abstract

Correlation functions of QCD currents with quantum numbers of nucleon and $\Delta$-isobar are considered at finite temperatures. Corrections of order $T^4$ to the correlators are calculated and interpreted in terms of thermal mass shifts using a QCD sum rules type of argument. In both cases the masses decrease with $T$.

Comments: 10 pages, latex, 2 figures included in the file