# Production de Lambda(1520) dans les collisions p+p et Au+Au à sqrt(s_NN) = 200 GeV dans l'expérience STAR au RHIC

Abstract : Ultra-relativistic heavy ion collisions are produced in order to observe the created hot and dense matter. One major goal is to probe the existence of the Quark Gluon Plasma (QGP). The QGP would be the state of matter in which temperature and density are high enough to break the quark confinement into hadrons. For that purpose, the RHIC collider has produced p+p and Au+Au collisions at the energy of $\sqrt(s_(NN))=$ 200 GeV. This thesis work is focused on the production of $\Lambda (1520)$ resonances in these collisions with the STAR experiment. In comparison with statistical prediction, the measured $\Lambda (1520)/\Lambda$ ratios show a significant lowering in ultra-relativistic heavy ion collisions. These results strongly support the decoupling of the system in two stages : a chemical freeze-out followed by a thermal freeze-out. This conclusion constitutes an important step to an understanding of the created matter in high energy heavy ion collisions.
Mots-clés :
Document type :
Theses
Domain :
Complete list of metadata

https://tel.archives-ouvertes.fr/tel-00003775
Contributor : Ludovic Gaudichet Connect in order to contact the contributor
Submitted on : Monday, November 17, 2003 - 7:31:10 PM
Last modification on : Wednesday, April 27, 2022 - 3:51:07 AM
Long-term archiving on: : Wednesday, September 12, 2012 - 11:40:33 AM

### Identifiers

• HAL Id : tel-00003775, version 1

### Citation

Ludovic Gaudichet. Production de Lambda(1520) dans les collisions p+p et Au+Au à sqrt(s_NN) = 200 GeV dans l'expérience STAR au RHIC. Physique Nucléaire Théorique [nucl-th]. Université de Nantes, 2003. Français. ⟨tel-00003775⟩

Record views