Deep sub-threshold phi production in Au plus Au collisions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00488734" target="_blank" >RIV/61389005:_____/18:00488734 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.physletb.2018.01.048" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2018.01.048</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2018.01.048" target="_blank" >10.1016/j.physletb.2018.01.048</a>

Result language
angličtina
Original language name
Deep sub-threshold phi production in Au plus Au collisions
Original language description
We present data on charged kaons (K-+/-) and phi mesons in Au(1.23AGeV)+ Au collisions. It is the first simultaneous measurement of K- and phi mesons in central heavy-ion collisions below a kinetic beam energy of 10AGeV. The phi/K- multiplicity ratio is found to be surprisingly high with a value of 0.52 +/- 0.16and shows no dependence on the centrality of the collision. Consequently, the different slopes of the K+ and K- transverse-mass spectra can be explained solely by feed-down, which substantially softens the spectra of K- mesons. Hence, in contrast to the commonly adapted argumentation in literature, the different slopes do not necessarily imply diverging freeze-out temperatures of K+ and K- mesons caused by different couplings to baryons.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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