Sub-threshold strangeness production measured with HADES

0502287 - ÚJF 2020 RIV NL eng J - Journal Article
Kornakov, G. - Adamczewski-Musch, J. - Arnold, O. - Arnoldi-Meadows, B. - Belounnas, A. - Chlad, Lukáš - Chudoba, Petr - Kugler, Andrej - Kushpil, Vasilij - Mikhaylov, Vasily - Prozorov, Alexandr P. - Rodriguez Ramos, Pablo - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … Total 127 authors
Sub-threshold strangeness production measured with HADES.
Nuclear Physics. A. Roč. 982, č. 2 (2019), s. 803-806. ISSN 0375-9474. E-ISSN 1873-1554.
[27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018). Venice, 13.05.2018-19.05.2018]
R&D Projects: GA MŠMT LM2015049; GA MŠMT EF16_013/0001677
Institutional support: RVO:61389005
Keywords : HADES * strangeness * subthreshold * baryon resonances
OECD category: Nuclear physics
Impact factor: 1.695, year: 2019
Method of publishing: Open access
https://doi.org/10.1016/j.nuclphysa.2018.10.073

At energies below root S-NN approximate to 2.55 GeV, strange quarks cannot be produced in binary nucleon-nucleon collisions because of the higher production threshold of the lightest hadrons carrying strangeness. Hence, the investigation of sub-threshold strangeness production in heavy-ion collisions is one of the most promising probes, to access the properties of the created system, as the missing energy must be provided by the latter one. For the first time, a nearly complete set of strange particles has been reconstructed in the 40% most central Au+Au collisions at. root S-NN = 2.42 GeV. The data sample includes multi-differential representations of charged and neutral particles containing strangeness (K-+/-,K-s(0), phi, Lambda). To achieve a better understanding of strangeness production the properties of the short-lived resonances have to be investigated. The first steps in this direction are presented here, including the reconstruction of baryon resonances using a new iterative technique, comparison to microscopic transport model calculations and interpretation of the pion transverse momentum distribution.
Permanent Link: http://hdl.handle.net/11104/0294237