Strangeness production in Au(1.23A GeV)+Au collisions

0489247 - ÚJF 2019 NL eng J - Článek v odborném periodiku
Schuldes, H. - Chlad, Lukáš - Kugler, Andrej - Rodriguez Ramos, Pablo - Sobolev, Yuri, G. - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … celkem 112 autorů
Strangeness production in Au(1.23A GeV)+Au collisions.
Nuclear Physics. A. Roč. 967, č. 11 (2017), s. 804-807. ISSN 0375-9474. E-ISSN 1873-1554.
[26th International Conference on Ultrarelativistic Nucleus-Nucleus Collissions (Quark Matter). Chicago, 05.02.2017-11.02.2017]
Grant CEP: GA ČR GA13-06759S; GA MŠMT LM2015049; GA MŠMT EF16_013/0001677
Institucionální podpora: RVO:61389005
Klíčová slova: strangeness * sub-treshold * centrality dependence
Obor OECD: Nuclear physics
Impakt faktor: 1.992, rok: 2017

We present first data on centrality dependent K+, K- and phi production in Au+Au collisions at a kinetic beam energy of 1.23A GeV measured with HADES. We observe no significant increase of the K+ K- and phi/K- multiplicity ratios with centrality of the collision. The measured phi/K- ratio is found to be larger than results at higher energies. The significant phi feed-down contribution to the K-yield substantially softens the measured transverse mass spectrum of K-, explaining its lower observed effective temperature in comparison to the one of K+
Trvalý link: http://hdl.handle.net/11104/0283691