Transverse velocity dependence of pion-kaon correlations at LHC energies

Adam Kisiel

doi:10.1117/12.2280097

7 August 2017 Transverse velocity dependence of pion-kaon correlations at LHC energies

Adam Kisiel

Proceedings Volume 10445, Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2017; 1044541 (2017) https://doi.org/10.1117/12.2280097
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2017, 2017, Wilga, Poland

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.

Citation Download Citation

Adam Kisiel "Transverse velocity dependence of pion-kaon correlations at LHC energies", Proc. SPIE 10445, Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2017, 1044541 (7 August 2017); https://doi.org/10.1117/12.2280097

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KEYWORDS

Particles

Correlation function

Atmospheric particles

Monte Carlo methods

Ions

Physics

Spherical lenses

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