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:
影响因子:
--
通讯作者:
T. Fukuda et al.
中科院分区:
文献类型:
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作者:
K. Kishimoto;S. Ajimura;A. Sakaguchi;T. Fukuda et al.
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.