Photoproduction of neutral kaon on 12C in the threshold region
Photoproduction of neutral kaon on 12C in the threshold region
复制标题
阈值区域 12C 上中性 kaon 的光产生
DOI：
10.1016/j.physletb.2007.06.033
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Yamazaki
中科院分区：
文献类型：
--
作者：
T. Watanabe;P. Bydvzovsk'y;K. Dobashi;S. Endo;Y. Fujii;O. Hashimoto;T. Ishikawa;K. Itoh;H. Kanda;M. Katoh;T. Kinoshita;O. Konno;K. Maeda;A. Matsumura;F. Miyahara;H. Miyase;T. Miyoshi;K. Mizunuma;Y. Miura;S. N. Nakamura;H. Nomura;Y. Okayasu;T. Osaka;M. Oyamada;A. Sasaki;T. Satoh;H. Shimizu;M. Sotona;T. Takahashi;T. Tamae;H. Tamura;T. Terasawa;H. Tsubota;K. Tsukada;M. Ukai;M. Wakamatsu;H. Yamauchi;H. Yamazaki
在0.8- 1.1GeV的光子能量范围内，通过测量中性K介子，研究了~（12）C上K介子的光生过程。中性K介子是由两个带电的π介子在KS 0 →π+π−衰变道中发射而得到的不变质量来确定的。得到了阈值光子能区的微分截面和积分截面。得到的动量谱进行了比较与观众模型计算使用最近的等压线模型给出的K介子光生的基本振幅。目前的结果提供了关于n（γ，K 0）Λ反应的第一个信息，该反应有望在构建电磁相互作用奇异值产生模型中发挥重要作用.实验结果表明，C12（γ，K ~ 0）的散射截面与C12（γ，K ~+）的散射截面是同一数量级的，并表明在γn→ K ~ 0 ~ Λ过程中，K ~ 0的角分布倾向于略微向后.
The kaon photo-production process on12C has been studied by measuring neutral kaons in the photon energy range of 0.8–1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the KS0→π+π−decay channel. The differential and integrated cross sections in the threshold photon energy region were obtained. The obtained momentum spectra were compared with a Spectator model calculation using elementary amplitudes of kaon photo-production given by recent isobar models. The present results provide the first information on the n(γ,K0)Λ reaction, which is expected to play an important role in constructing models of strangeness production by electromagnetic interactions. The experimental results show that the cross section of C12(γ,K0) is of the same order as that of C12(γ,K+) and suggest that a slightly backward K0angular distribution is favored in the γn→K0Λ process.