Geometry and dynamics in heavy-ion collisions seen by the femtoscopy method

Hanna Paulina Zbroszczyk

doi:10.1117/12.2536695

6 November 2019 Geometry and dynamics in heavy-ion collisions seen by the femtoscopy method

Hanna Paulina Zbroszczyk

Proceedings Volume 11176, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019; 1117643 (2019) https://doi.org/10.1117/12.2536695
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019, 2019, Wilga, Poland

Abstract

Geometry and dynamics of the source produced as a results of heavy-ion collisions at high energies can be studies via femtoscopy method. Correlations of two particles at small relative momentum are sensitive to the effects of Quantum Statistics and the Final State Interactions. They allow one to study the space-time properties of the source which are of the order of 10¹⁵ m and 10⁻²³ s, respectively. Beam Energy Scan (BES) program conducted at the Relativistic Heavy Ion Collider (RHIC) covers an important part of the QCD Phase Diagram with beams of Au ions accelerated to relativistic velocities. Already completed first phase of the BES program uses heavy-ions collided in the energy range measured in the reference frame of center of mass from 7.7 to 200 GeV. This is a baryon-rich region that can be studied via femtoscopy methods with baryons. On one hand meson-meson correlations are the most commonly studied and baryon-baryon systems together with two-meson and meson-baryon correlations provide a complete information about source parameters. On the other hand the measurements of non-identical particle combinations complement our knowledge about space-time asymmetries during emission process. Physics of heavy-ion collisions is successfully deduced basing on studies of the properties of the particle-emitting source and how they change with different collision energies. Such studies include various centralities of the collision. In this paper, the STAR preliminary results including femtoscopic systems of various particle combinations such as protons, pions and kaons produced as a results of Au+Au collisions at BES energies are discussed.

Citation Download Citation

Hanna Paulina Zbroszczyk "Geometry and dynamics in heavy-ion collisions seen by the femtoscopy method", Proc. SPIE 11176, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019, 1117643 (6 November 2019); https://doi.org/10.1117/12.2536695

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KEYWORDS

Correlation function

Atmospheric particles

Particles

Gold

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Quantum chromodynamics

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