Regular Article – Theoretical Physics
Resolving the hyper-triton yield description puzzle in high energy nuclear collisions
Department of Physics, Taras Shevchenko National University of Kyiv, 03022, Kyiv, Ukraine
2 University of Oslo, POB 1048, Blindern, 0316, Oslo, Norway
3 Bogolyubov Institute for Theoretical Physics, Metrologichna str. 14B, 03680, Kyiv, Ukraine
4 National Research Nuclear University (MEPhI), Kashirskoe Shosse 31, 115409, Moscow, Russia
5 Institute for Nuclear Research, Russian Academy of Science, 108840, Moscow, Russia
6 Institute of Theoretical Physics, University of Wroclaw, Max Born Pl. 9, 50-204, Wroclaw, Poland
7 Bogoliubov Laboratory of Theoretical Physics, JINR Dubna, Joliot-Curie Str. 6, 141980, Dubna, Russia
8 Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119899, Moscow, Russia
Accepted: 29 December 2020
Published online: 24 February 2021
The recently developed hadron resonance gas model with multicomponent hard-core repulsion is used to address and resolve the long standing problem to describe the light nuclear cluster multiplicities including the hyper-triton measured by the STAR Collaboration, known as the hyper-triton chemical freeze-out puzzle. An improved description for the hadronic and light nuclear cluster data measured by STAR at the collision energy GeV and by ALICE at TeV is obtained. This is achieved by applying a new strategy of analyzing the light nuclear cluster data and by using the value for the hard-core radius of the (anti-) hyperons found in earlier work. One of the most striking results of the present work is that for the most probable scenario of chemical freeze-out for the STAR energy the obtained parameters allow to simultaneously reproduce the values of the experimental ratios and which were not included in the fit.
© The Author(s) 2021
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