Abstract
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 tunnelling 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 a universal temperature TH � (σ/2π) 1/2 ,w hereσ denotes the string tension. Since the event horizon does not allow information transfer, the radiation is thermal at birth.
Highlights
The pattern of multihadron production in high energy collisions is one of the most fascinating topics in strong interaction physics
This similarity was noted quite soon after the advent of QCD, and it was suggested that hadrons were the analogue of black holes in strong interaction physics [3,4,5]
In this report, based on joint work with Paolo Castorina and Dmitri Kharzeev [1], we want to show that high energy collisions in strong interaction physics produce a self-similar cascade of “white holes”, and that the Hawking radiation arising at the confinement horizon of these can provide the thermal behaviour observed quite universally in all soft hadron production [7, 8]
Summary
The pattern of multihadron production in high energy collisions is one of the most fascinating topics in strong interaction physics. In this report, based on joint work with Paolo Castorina and Dmitri Kharzeev [1], we want to show that high energy collisions in strong interaction physics produce a self-similar cascade of “white holes” (colourless from the outside, but coloured inside), and that the Hawking radiation arising at the confinement horizon of these can provide the thermal behaviour observed quite universally in all soft hadron production [7, 8]
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