Kaon pair production in pp, pd and dd collisions at COSY
Kaon pair production in pp, pd and dd collisions at COSY
复制标题
COSY 的 pp、pd 和 dd 碰撞中 Kaon 对的产生
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
X. Yuan
中科院分区：
文献类型：
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作者：
M. Hartmann;A. Dzyuba;I. Keshelashvili;Y. Maeda;A. Polyanskiy;C. Wilkin;X. Yuan
在较冷的同步加速器COSY上，研究了质子-质子、质子-重离子和重离子-重离子碰撞中的近阈值Kaon对的产生。Pp→pPK+K−反应的激发函数以及不变的K−p、K−pp和K+K−质量分布表明，K−p和K+K−末态相互作用都存在。在pp→DK+K0反应和pn→DK+K−反应中也发现了类似的反K粒子与氚的末态相互作用，这是在准自由Pd→pspdK+K−过程中测得的。现有的关于Pd→3HeK+K−反应的COSY数据还不足以研究K−3He和K+K−末态相互作用。Dd→4HeK+K−反应的总截面很小。
The near‐threshold production of kaon‐pairs has been investigated in proton‐proton, proton‐deuteron and deuteron‐deuteron collisions at the Cooler Synchrotron COSY. The excitation function for the pp→ppK+K− reaction and the invariant K−p, K−pp, and K+K− mass distributions indicate the presence of both K−p and K+K− final state interactions. Analogous final‐state interactions of antikaons with deuterons has been found in the pp→dK+K0 reaction as well as in the pn→dK+K− reaction, measured in the quasi‐free pd→pspdK+K− process with a “spectator” proton (psp). The existing COSY data on the pd→3HeK+K− reaction are not yet sufficient to study the K−3He and K+K− final state interactions. A very small total cross section was found for the dd→4HeK+K− reaction.