The structure of the from system size dependent hadronic resonance ratios in p + p, p + Pb, and Pb + Pb collisions at the LHC

Tom Reichert; Jan Steinheimer; Volodymyr Vovchenko; Christoph Herold; Ayut Limphirat; Marcus Bleicher

doi:10.1140/epjc/s10052-024-13690-w

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 1301
https://doi.org/10.1140/epjc/s10052-024-13690-w

Regular Article - Theoretical Physics

The structure of the $f_{0} (980)$ from system size dependent hadronic resonance ratios in p + p, p + Pb, and Pb + Pb collisions at the LHC

Tom Reichert¹^,2^,3, Jan Steinheimer²^,6^a, Volodymyr Vovchenko²^,4, Christoph Herold⁵, Ayut Limphirat⁵ and Marcus Bleicher¹^,3^,6

¹ Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, 60438, Frankfurt am Main, Germany
² Frankfurt Institute for Advanced Studies (FIAS), Ruth-Moufang-Str. 1, 60438, Frankfurt am Main, Germany
³ Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung GmbH, Campus Frankfurt, Max-von-Laue-Str. 12, 60438, Frankfurt am Main, Germany
⁴ Physics Department, University of Houston, Box 351550, 77204, Houston, TX, USA
⁵ Center of Excellence in High Energy Physics and Astrophysics, School of Physics, Suranaree University of Technology, University Avenue 111, 30000, Nakhon Ratchasima, Thailand
⁶ GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291, Darmstadt, Germany

^a steinheimer@fias.uni-frankfurt.de

Received: 29 May 2024
Accepted: 6 December 2024
Published online: 20 December 2024

Abstract

It is shown that the hadronic phase in ultra-relativistic heavy ion collisions can be used to understand the properties of the $f_{0} (980)$ $$f_0(980)$$ resonance. In particular it is shown that the centrality dependence of the $f_{0} (980) / π$ $f_0(980)/\pi$ and $f_{0} (980) / ϕ$ $f_0(980)/\phi$ ratios depends strongly on the $f_{0} (980) \to \bar{K} + K$ $f_0(980)\rightarrow {\overline{K}}+K$ branching ratio and whether the $f_{0} (980)$ $$f_0(980)$$ is produced as a $| \bar{q} q 〉$ $\left| {\overline{q}}q \right\rangle$ or $| \bar{s} s 〉$ $\left| {\overline{s}}s \right\rangle$ state. These conclusions are drawn from calculations within the partial chemical equilibrium of the HRG model within Thermal-FIST as well as with the fully non-equilibrium hybrid-transport approach UrQMD. Our findings show how the hadronic phase in heavy ion collisions can be used for studies of exotic hadron properties otherwise possible only in dedicated experiments such as PANDA.

© The Author(s) 2024

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