Szczegóły publikacji
Opis bibliograficzny
Strange hadron production in Au+Au collisions at $\sqrt{s_{NN}}$=7.7, 11.5, 19.6, 27, and 39 GeV / J. Adam, L. ADAMCZYK, [et al.], Ł. FULEK, [et al.], B. Pawlik, [et al.], M. PRZYBYCIEŃ, [et al.], R. SIKORA, [et al.] // Physical Review. C ; ISSN 2469-9985. — Tytuł poprz.: Physical Review. C, Nuclear Physics ; ISSN: 0556-2813. — 2020 — vol. 102 iss. 3, art. no. 034909, s. 034909-1–034909-25. — Bibliogr. s. 034909-24–034909-25. — Publikacja dostępna online od: 2020-09-29
Autorzy (352)
Dane bibliometryczne
| ID BaDAP | 130888 |
|---|---|
| Data dodania do BaDAP | 2020-11-05 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevC.102.034909 |
| Rok publikacji | 2020 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physical Review, C |
Abstract
We present STAR measurements of strange hadron (KS0, Λ, Λ, Ξ-, Ξ+, ω-, ω+, and φ) production at midrapidity (|y|<0.5) in Au+Au collisions at sNN = 7.7-39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse-momentum spectra, averaged transverse mass, and the overall integrated yields of these strange hadrons are presented versus the centrality and collision energy. Antibaryon-to-baryon ratios (Λ/Λ, Ξ+/Ξ-, ω+/ω-) are presented as well and used to test a thermal statistical model and to extract the temperature normalized strangeness and baryon chemical potentials at hadronic freeze-out (μB/Tch and μS/Tch) in central collisions. Strange baryon-to-pion ratios are compared to various model predictions in central collisions for all energies. The nuclear modification factors (RCP) and antibaryon-to-meson ratios as a function of transverse momentum are presented for all collision energies. The KS0 RCP shows no suppression for pT up to 3.5 GeV/c at energies of 7.7 and 11.5 GeV. The Λ/KS0 ratio also shows baryon-to-meson enhancement at intermediate pT (≈2.5 GeV/c) in central collisions at energies above 19.6 GeV. Both observations suggest that there is likely a change of the underlying strange quark dynamics at collision energies below 19.6 GeV.
