Electromagnetic pion form factor at finite temperature

Abstract

The electromagnetic form factor of the pion in the space-like region, and at finite temperature, $F_{\pi }(Q^2,T)$, is obtained from a QCD Finite Energy Sum Rule. The form factor decreases with increasing T, and vanishes at some critical temperature, where the pion radius diverges. This divergence may be interpreted as a signal for quark deconfinement.

Comments: LATEX File. UCT-TP-215/94. One figure available on request. To be published in Phys. Lett. B