scholarly journals Hawking-Unruh Hadronization and Strangeness Production in High Energy Collisions

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Paolo Castorina ◽  
Helmut Satz
Keyword(s):  
Quark Mass ◽  
Particle Production ◽  
Mass Effect ◽  
Heavy Ion ◽  
Strange Particle ◽  
High Energy ◽  
Relativistic Heavy Ion Collisions ◽  
Thermalization Time ◽  
Strange Particle Production ◽  
High Energy Collisions

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≃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 (q)-antiquark (q̅) 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≃170 Mev, related to the quark acceleration,a, byT=a/2π. 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.

Quasielastic charmed-baryon production and exclusive strange-particle production by high-energy neutrinos

1983 ◽  
Vol 28 (9) ◽  
pp. 2129-2134 ◽  
Author(s):  
D. Son ◽  
G. A. Snow ◽  
C. Y. Chang ◽  
S. Kunori ◽  
P. H. Steinberg ◽  
...  
Keyword(s):  
Particle Production ◽  
Strange Particle ◽  
High Energy ◽  
Baryon Production ◽  
Charmed Baryon ◽  
Strange Particle Production ◽  
High Energy Neutrinos

A detailed study of strange particle production ine + e − annihilation at high energy

1985 ◽  
Vol 27 (1) ◽  
pp. 27-37 ◽  
Author(s):  
◽  
M. Althoff ◽  
W. Braunschweig ◽  
F. J. Kirschfink ◽  
K. Lübelsmeyer ◽  
...  
Keyword(s):  
Particle Production ◽  
Strange Particle ◽  
High Energy ◽  
Strange Particle Production

scholarly journals Strange hadron production in pp, pPb, and PbPb collisions at LHC energies

2018 ◽  
Vol 171 ◽  
pp. 13008
Author(s):  
Hong Ni
Keyword(s):  
Particle Production ◽  
Dynamical Evolution ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Strange Particle ◽  
Relativistic Heavy Ion Collisions ◽  
High Multiplicity ◽  
Collective Effects ◽  
Additional Information ◽  
Particle Ratios

Identified particle spectra provide an important tool for understanding the particle production mechanism and the dynamical evolution of the medium created in relativistic heavy ion collisions. Studies involving strange and multi-strange hadrons, such as K0S, Λ, and Ξ−, carry additional information since there is no net strangeness content in the initial colliding system. Strangeness enhancement in AA collisions with respect to pp and pA collisions has long been considered as one of the signatures for quark-gluon plasma (QGP) formation. Recent observations of collective effects in high-multiplicity pp and pA collisions raise the question of whether QGP can also be formed in the smaller systems. Systematic studies of strange particle abundance, particle ratios, and nuclear modification factors can shed light on this issue. The CMS experiment has excellent strange-particle reconstruction capabilities over a broad kinematic range, and dedicated high-multiplicity triggers in pp and pPb collisions. The spectra of K0S, Λ, and Ξ− hadrons have been measured in various multiplicity and rapidity regions as a function of pT in pp, pPb, and PbPb collisions for several collision energies. The spectral shapes and particle ratios are compared in the different collision systems for events that have the same multiplicity and interpreted in the context of hydrodynamics models.

I. Theoretical aspects of high energy neutrino interactions

1967 ◽  
Vol 301 (1465) ◽  
pp. 107-112 ◽  
Keyword(s):  
Particle Production ◽  
Weak Interactions ◽  
Vector Boson ◽  
Strange Particle ◽  
High Energy ◽  
High Energy Neutrino ◽  
Fermi Interaction ◽  
Energy Neutrino ◽  
Strange Particle Production ◽  
Intermediate Vector

In recent years high energy neutrinos produced at the large accelerators have been used to investigate the properties of weak interactions. As a result we know now that there are at least two kinds of neutrinos, and that an eventual intermediate vector boson is heavier than 2 GeV. In addition, the conventional theory of weak interactions has been tested in a larger domain, and found to be in reasonable agreement with experiment; in particular, strange particle production does not exceed appreciably what is predicted by Cabibbo’s theory, which may be inter­preted as further evidence against the older universal Fermi interaction theory. Thus the situation at this moment is quite satisfactory, as far as the established notions on weak interactions are concerned. We may now ask to what extent high energy neutrino physics may be used as a tool to extend our knowledge of the weak interactions.

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