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Etude des correlations de particules etranges mesurees par l'experience STAR dans les collisions ions lourds ultra-relativistes au RHIC

Abstract : Non-identical correlation functions allow to study the space-time evolution of the source of particles formed in ultra-relativistic heavy ion collisions. The STAR experiment is dedicated to probe the formation of a new state of nuclear matter called Quark Gluon Plasma. The proton - lambda correlation function is supposed to be more sensitive to bigger source sizes than the proton - proton because of the absence of the final state Coulomb interaction. In this thesis, proton - lambda, anti-proton - anti-lambda, anti-proton - lambda and proton - anti-lambda correlation functions are studied in Au+Au collisions at = 200 GeV using an analytical model. The proton - lambda and anti-proton - anti-lambda correlation functions exhibit the same behavior as in previous measurements. The anti-proton - lambda and proton - anti-lambda correlation functions, measured for the first time, show a very strong signal corresponding to the baryon–anti-baryon annihilation channel. Parameterizing the correlation functions has allowed to characterize final state interactions.
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https://tel.archives-ouvertes.fr/tel-00007489
Contributor : Gaël Renault Connect in order to contact the contributor
Submitted on : Tuesday, November 23, 2004 - 12:21:25 PM
Last modification on : Friday, June 22, 2018 - 9:33:38 AM
Long-term archiving on: : Friday, April 2, 2010 - 9:18:44 PM

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  • HAL Id : tel-00007489, version 1

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Gaël Renault. Etude des correlations de particules etranges mesurees par l'experience STAR dans les collisions ions lourds ultra-relativistes au RHIC. Physique Nucléaire Théorique [nucl-th]. Université de Nantes, 2004. Français. ⟨tel-00007489⟩

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