Search for a bound kaon and pion state

Search for a bound kaon and pion state
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搜索结合的 kaon 和 pion 态

DOI:
10.1093/ptep/ptt003
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发表时间:
2013
期刊:
Progress of Theoretical ans Experimental Physics
影响因子:
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通讯作者:
T. Fukuda et al.
T. Fukuda et al.
中科院分区:
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文献类型:
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作者:
K. Kishimoto;S. Ajimura;A. Sakaguchi;T. Fukuda et al.

文献摘要

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我们已经寻找了由 X 表示的束缚 kaon 和 pion 态。X 被推测是为了将所谓的 θ+共振解释为束缚 kaon、pion 和核子态。这个模型几乎解释了 θ+ 的所有性质;然而,只有当 Kπ 相互作用有吸引力并且足够强以形成束缚态 X 时,该模型才有效。在这里,我们报告了通过使用 PK∼1200 MeV/c 处的反应来搜索 X 的结果。衰变在其他过程无法发生的动量区域中产生 K+。观察到的事件不能用其他已知的物理过程来解释。如果我们假设这些事件是由于 X 的产生引起的,那么我们得到 1±0.5% 作为 X 的产生相对于 π0 的产生。由于我们没有明确的证据表明它们确实对应于 X 的生产,因此我们给出 1.5% 作为上限。
We have searched for a bound kaon and pion state denoted byX.Xwas conjectured to explain the so-called Θ+resonance as a bound kaon, pion, and nucleon state. This model explains almost all the properties of Θ+; however, the model only works if theKπinteraction is attractive and sufficiently strong to make a bound stateX. Here we report a result of the search forXby using thereaction at PK∼1200 MeV/c.decay producesK+in a momentum region where other processes cannot occur. The observed events cannot be explained by other known physical processes. If we assume that these events are due to the production ofX, we obtain 1±0.5% as the production ofXwith respect to that ofπ0. Since we have no definitive evidence that they indeed correspond to production ofX, we give 1.5% as the upper limit.