Hrsg.: HADES Collaboration (2019)
Strong absorption of hadrons with hidden and open strangeness in nuclear matter.
In: Physical Review Letters, 123 (2)
doi: 10.1103/PhysRevLett.123.022002
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present the first observation of K− and ϕ absorption within nuclear matter by means of π−-induced reactions on C and W targets at an incident beam momentum of 1.7 GeV/c studied with HADES at SIS18/GSI. The double ratio (K−/K+)W/(K−/K+)C is found to be 0.319±0.009(stat)+0.014−0.012(syst) indicating a larger absorption of K− in heavier targets as compared to lighter ones. The measured ϕ/K− ratios in π−+C and π−+W reactions within the HADES acceptance are found to be equal to 0.55±0.04(stat)+0.06−0.07(syst) and to 0.63±0.06(stat)+0.11−0.11(syst), respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the ϕ meson in nuclear medium is strongly coupled to the K− dynamics. The large difference in the ϕ production off C and W nuclei is discussed in terms of a strong ϕN in-medium coupling. These results are relevant for the description of heavy-ion collisions and the structure of neutron stars.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Art des Eintrags: | Bibliographie |
| Titel: | Strong absorption of hadrons with hidden and open strangeness in nuclear matter |
| Sprache: | Englisch |
| Publikationsjahr: | 12 Juli 2019 |
| Verlag: | APS Physics |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review Letters |
| Jahrgang/Volume einer Zeitschrift: | 123 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1103/PhysRevLett.123.022002 |
| Kurzbeschreibung (Abstract): | We present the first observation of K− and ϕ absorption within nuclear matter by means of π−-induced reactions on C and W targets at an incident beam momentum of 1.7 GeV/c studied with HADES at SIS18/GSI. The double ratio (K−/K+)W/(K−/K+)C is found to be 0.319±0.009(stat)+0.014−0.012(syst) indicating a larger absorption of K− in heavier targets as compared to lighter ones. The measured ϕ/K− ratios in π−+C and π−+W reactions within the HADES acceptance are found to be equal to 0.55±0.04(stat)+0.06−0.07(syst) and to 0.63±0.06(stat)+0.11−0.11(syst), respectively. The similar ratios measured in the two different reactions demonstrate for the first time experimentally that the dynamics of the ϕ meson in nuclear medium is strongly coupled to the K− dynamics. The large difference in the ϕ production off C and W nuclei is discussed in terms of a strong ϕN in-medium coupling. These results are relevant for the description of heavy-ion collisions and the structure of neutron stars. |
| Zusätzliche Informationen: | Art.No.: 022002 |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik > Untersuchung von Quark-Materie mit virtuellen Photonen |
| Hinterlegungsdatum: | 26 Feb 2024 15:37 |
| Letzte Änderung: | 14 Mai 2024 14:46 |
| PPN: | 518266400 |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum