Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter

0506943 - ÚJF 2020 RIV US eng J - Journal Article
Adamczewski-Musch, J. - Arnold, O. - Atomssa, E. T. - Behnke, C. - Chlad, Lukáš - Chudoba, Petr - Kugler, Andrej - Mikhaylov, Vasily - Prozorov, Alexandr P. - Rodriguez Ramos, Pablo - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … Total 122 authors
Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter.
Physical Review Letters. Roč. 123, č. 2 (2019), č. článku 022002. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA MŠMT LM2015049; GA MŠMT EF16_013/0001677; GA MŠMT LTT17003
Institutional support: RVO:61389005
Keywords : HADES collaboration * heavy ion collisions * structure of neutron stars
OECD category: Nuclear physics
Impact factor: 8.385, year: 2019
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevLett.123.022002

We present the first observation of K- and phi absorption within nuclear matter by means of pi(-)-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)(-0.012)(+0.014)(syst) indicating a larger absorption of K- in heavier targets as compared to lighter ones. The measured phi/K- ratios in pi(-) + C and pi(-) + W reactions within the HADES acceptance are found to be equal to 0.55 +/- 0.04(stat)(-0.07)(+0.06) (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 phi meson in nuclear medium is strongly coupled to the K- dynamics. The large difference in the. production off C and W nuclei is discussed in terms of a strong phi N in-medium coupling. These results are relevant for the description of heavy-ion collisions and the structure of neutron stars.
Permanent Link: http://hdl.handle.net/11104/0298070