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Transverse velocity dependence of pion-kaon correlations at LHC energies
Author(s): Adam Kisiel
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Paper Abstract

Collisions of heavy ions are a unique tool, which enables the study of strongly interacting matter at highest possible temperatures and densities. At the Large Hadron Collider the Pb ions are collided at the highest energies achieved in the laboratory – 2.76 ATeV. A system created in the collision behaves collectively. Hydrodynamic models are used to describe its behavior. As the systems expands and cools down, it emits particles of all types. Analyzing correlations between them enables to study the spatio-temporal dynamics of the collision via a technique called “femtoscopy”. For identical pions this technique is well established and shows that more central collisions produce larger systems. At the same time the collective flows produce a dependence of the system size on pair velocity. This work concentrates on correlations between pions and kaons. In such analysis one is also able to measure the “emission asymmetry”, or the difference in average emission points of both particles. The non-zero value of this difference for particles of different mass is another independent consequence of radial flow. In this work the pion-kaon correlations are for the first time analyzed as a function of pair transverse velocity. In this way the two important signatures of collective flow are analyzed at the same time and their mutual influence is investigated. In addition the non-femtoscopic backgrounds in such functions are also studied.

Paper Details

Date Published: 7 August 2017
PDF: 7 pages
Proc. SPIE 10445, Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2017, 1044541 (7 August 2017); doi: 10.1117/12.2280097
Show Author Affiliations
Adam Kisiel, Warsaw Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 10445:
Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2017
Ryszard S. Romaniuk; Maciej Linczuk, Editor(s)

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