eprintid: 20725
rev_number: 11
eprint_status: archive
userid: 2510
dir: disk0/00/02/07/25
datestamp: 2016-06-01 08:10:58
lastmod: 2016-06-10 11:57:08
status_changed: 2016-06-01 08:10:58
type: doctoralThesis
metadata_visibility: show
creators_name: Zinyuk, Victoria
title: Systematic study of strangeness production and 
dynamic behaviour with the FOPI experiment  at SIS-18
subjects: ddc-530
divisions: i-130200
adv_faculty: af-13
abstract: This work is dedicated to the investigation of in-medium behaviour of strange particles. 
 
 In-medium production and propagation of $K^+$  and $K^-$ mesons is studied with the FOPI apparatus 
 in $^{58}$Ni\,+\,$^{58}$Ni collisions at the incident beam energy of $E_{beam}$= 1.91 AGeV, i.e.  
 near the strangeness production threshold energies.
 Weak in-plane `anti\,-\,flow'  with respect to protons and a slight `squeeze-out'
 is found in the azimuthal emission pattern of $K^{+}$ mesons.
 $K^{-}$ mesons exhibit an isotropic emission pattern within large statistic uncertainties.
 The comparison to the predictions of two independent transport calculations, HSD and IQMD, suggests
 a weakly repulsive $KN$ in-medium potential of $U_{KN} = 20 \pm 5$\,MeV and an attractive
 $\bar{K}N$ in\,-\,medium potential of $U_{K^{-}N} = -40 \pm 10$\,MeV.
 
  Production of $K^{+/-/0}$, $\phi$ mesons and the $\Lambda$ baryon at normal nuclear matter density 
  is studied in $\pi^-+A$ reactions with C, Cu and Pb targets at incident beam momentum of $p_{\pi^-}$= 1.7 GeV/$c$.
  Differences in the final state phase space distributions measured in heavy and light targets point to 
  repulsion for $K^+$ and $K^0_S$ mesons in nuclear medium. The latter is solely attributed to the strong interaction.
  The corresponding comparison for $K^-$ mesons suggests a strong absorption in nuclear medium.
  Observed  $\phi$ meson yields  support the hypothesis of $Z^{\alpha}$\,-\,scaling of the production cross section.
date: 2016
id_scheme: DOI
id_number: 10.11588/heidok.00020725
ppn_swb: 1657154068
own_urn: urn:nbn:de:bsz:16-heidok-207259
date_accepted: 2016-05-10
advisor: HASH(0x561a6293a138)
language: eng
bibsort: ZINYUKVICTSYSTEMATIC2016
full_text_status: public
citation:   Zinyuk, Victoria  (2016) Systematic study of strangeness production and dynamic behaviour with the FOPI experiment at SIS-18.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/20725/1/VZinyukPHDThesis.pdf