Kaon, antikaon and φ(1020) production in Al+Al collisions at 1.9 A Gev

被引：0

作者：

Gasik, Piotr ^{[1
]}

Wisniewski, Krzysztof ^{[1
]}

机构：

[1] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

来源：

ACTA PHYSICA POLONICA B | 2008年 / 39卷 / 02期

关键词：

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper the production of K+, K- and phi mesons in Al+Al collisions at incident beam energy of 1.9A GeV is studied. The experiment was performed in GSI/Darmstadt using the FOPI spectrometer. The K-/K+ yields ratio was extracted in a substantial part of the phase-space. The yields ratio was found to be in a good agreement with previous experimental results that served as a proof for in-medium modifications of kaons' properties. In order to quantify the contribution of phi mesons decays to the observed K- mesons yield, the phi meson production probability was estimated. The preliminary result differs by almost two orders of magnitude from the earlier estimate available for heavier (Ni+Ni) system at similar beam energy, in which the number of K- mesons that could stem from phi mesons decays was found to be as high as 20%.

引用

页码：355 / 361

页数：7

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