Simple solution to the Strangeness Horn description puzzle
| Autor: | K. A. Bugaev, Alexander Sorin, Dmytro Oliinychenko, Gennady Zinovjev |
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| Rok vydání: | 2013 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Nuclear Theory Meson Hadron FOS: Physical sciences Radius Strangeness Resonance (particle physics) Nuclear Theory (nucl-th) Baryon High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Pion Virial coefficient High Energy Physics::Experiment Nuclear Experiment |
| Zdroj: | The European Physical Journal A. 49 |
| ISSN: | 1434-601X 1434-6001 |
| DOI: | 10.1140/epja/i2013-13030-y |
| Popis: | We propose to use the thermal model with the multi-component hard-core radii to describe the hadron yield ratios from the low AGS to the highest RHIC energies. It is demonstrated that the variation of the hard-core radii of pions and kaons enable us to drastically improve the fit quality of the measured mid-rapidity data and for the first time to completely describe the Strangeness Horn behavior as the function of the energy of collision without spoiling the fit quality of other ratios. The best global fit is found for the vanishing hard-core radius of pions and for the hard-core radius of kaons being equal to 0.35 fm, whereas the hard-core radius of all other mesons is fixed to 0.3 fm and that one of baryons is fixed to 0.5 fm. It is argued that the multi-component hadron resonance gas model opens us a principal possibility to determine the second virial coefficients of hadron-hadron interaction. 11 pages, 3 figures |
| Databáze: | OpenAIRE |
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