Publication: Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter
Дата
2019
Авторы
Adamczewski-Musch, J.
Arnold, O.
Atomssa, E. T.
Behnke, C.
Morozov, S.
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Аннотация
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.
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Цитирование
Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter / Adamczewski-Musch, J [et al.] // Physical Review Letters. - 2019. - 123. - № 2. - 10.1103/PhysRevLett.123.022002
URI
https://www.doi.org/10.1103/PhysRevLett.123.022002
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https://openrepository.mephi.ru/handle/123456789/18376