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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Femtoscopy with multi-strange baryons at RHIC
 Chaloupka, Petr ; Šumbera, Michal (advisor) ; Závada, Petr (referee) ; Staroba, Pavel (referee)
Au-Au collisions at RHIC energies exhibit features suggesting that the system has undergone evolution through a stage of partonic matter. The hot and dense system created in the collision builds up substantial collectivity leading to rapid transverse expansion. In particular recent measurements show that Ξ and Ω baryons develop substantial elliptic flow. Properties of the induced flow strongly depend on whether the collectivity is achieved on partonic or hadronic level. Multi-strange baryons may be, due to their presumably small hadronic cross- sections, mainly sensitive to the early (possibly partonic) stage. The main objective of this thesis is to study femtoscopic π−Ξ correlations in Au+Au collisions at √ sNN =200 GeV and √ sNN =62 GeV recorded by the STAR experiment at RHIC. Measurements of momentum correlations of particles at small relative velocities are used to extract information about space-time extension of the particle-emitting source at the time of kinetic freeze-out. Non-identical particle measurements are sensitive not only to the size of the system, but also to an emission asymmetry between different particle species. Since this asymmetry may arise from the collective expansion and/or early decoupling of Ξ these measurements of π−Ξ correlations provide important test of the dynamics of...
Detailed record
Femtoscopy with multi-strange baryons at RHIC
 Chaloupka, Petr ; Šumbera, Michal (advisor) ; Závada, Petr (referee) ; Staroba, Pavel (referee)
Au-Au collisions at RHIC energies exhibit features suggesting that the system has undergone evolution through a stage of partonic matter. The hot and dense system created in the collision builds up substantial collectivity leading to rapid transverse expansion. In particular recent measurements show that Ξ and Ω baryons develop substantial elliptic flow. Properties of the induced flow strongly depend on whether the collectivity is achieved on partonic or hadronic level. Multi-strange baryons may be, due to their presumably small hadronic cross- sections, mainly sensitive to the early (possibly partonic) stage. The main objective of this thesis is to study femtoscopic π−Ξ correlations in Au+Au collisions at √ sNN =200 GeV and √ sNN =62 GeV recorded by the STAR experiment at RHIC. Measurements of momentum correlations of particles at small relative velocities are used to extract information about space-time extension of the particle-emitting source at the time of kinetic freeze-out. Non-identical particle measurements are sensitive not only to the size of the system, but also to an emission asymmetry between different particle species. Since this asymmetry may arise from the collective expansion and/or early decoupling of Ξ these measurements of π−Ξ correlations provide important test of the dynamics of...
Detailed record

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