CERN Accelerating science

Article
Report number	arXiv:1403.3541
Title	Hawking-Unruh Hadronization and Strangeness Production in High Energy Collisions
Author(s)	Castorina, P. (Catania U. ; INFN, Catania ; CERN ; Bielefeld U.) ; Satz, H. (Bielefeld U.)
Publication	2014
Imprint	14 Mar 2014
Number of pages	7
Note	Comments: Contribution to special issue of Adv. High Energy Phys. entitled "Experimental Tests of Quantum Gravity and Exotic Quantum Field Theory Effects" Contribution to special issue of Adv. High Energy Phys. entitled "Experimental Tests of Quantum Gravity and Exotic Quantum Field Theory Effects"
In:	Adv. High Energy Phys. 2014 (2014) 376982
DOI	10.1155/2014/376982
Subject category	Particle Physics - Phenomenology
Abstract	The thermal multihadron production observed in different high energy collisions poses many basic problems: why do even elementary, $e^+e^-$ and hadron-hadron, collisions show thermal behaviour? Why is there in such interactions a suppression of strange particle production? Why does the strangeness suppression almost disappear in relativistic heavy ion collisions? Why in these collisions is the thermalization time less than $\simeq 0.5$ fm/c? We show that the recently proposed mechanism of thermal hadron production through Hawking-Unruh radiation can naturally answer the previous questions. Indeed, the interpretation of quark- antiquark pairs production, by the sequential string breaking, as tunneling through the event horizon of colour confinement leads to thermal behavior with a universal temperature, $T \simeq 170$ Mev,related to the quark acceleration, a, by $T=a/2\pi$. The resulting temperature depends on the quark mass and then on the content of the produced hadrons, causing a deviation from full equilibrium and hence a suppression of strange particle production in elementary collisions. In nucleus-nucleus collisions, where the quark density is much bigger, one has to introduce an average temperature (acceleration) which dilutes the quark mass effect and the strangeness suppression almost disappears.
Copyright/License	publication: © 2014-2025 The Author(s) (License: CC-BY-3.0), sponsored by SCOAP³

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