PUB - Publikationen an der Universität Bielefeld

Multihadron production in high energy collisions, from e(+)e(-) annihilation to heavy ion interactions, shows remarkable thermal behaviour, specified by a universal "Hagedorn" temperature. We argue that this hadronic radiation is formed by tunneling through the event horizon of colour confinement, i.e., that it is the QCD counterpart of Hawking-Unruh radiation from black holes. It is shown to be emitted at a universal temperature T-H similar or equal to (sigma/2 pi)(1/2), where sigma, denotes the string tension. Since the event horizon does not allow information transfer, the radiation is thermal "at birth".