Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2006-07-18
Phys.Lett.B651:269-274,2007
Physics
Nuclear Physics
Nuclear Experiment
6 pages, 8 figures
Scientific paper
10.1016/j.physletb.2007.06.033
Kaon photo-production process on $^{12}$C has been studied by measuring neutral kaons in a 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 $K^{0}_{S}\to\pi^{+}\pi^{-}$ decay channel. The differential cross sections as well as the integrated ones 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. Present result provides, for the first time, the information on $n(\gamma,K^{0})\Lambda$ reaction which is expected to play an important role to construct models for strangeness production by the electromagnetic interaction. Experimental results show that cross section of $^{12}{\rm C}(\gamma,K^0)$ is of the same order to that of $^{12}{\rm C}(\gamma,K^+)$ and suggest that slightly backward $K^0$ angular distribution is favored in the $\gamma n\to K^0\Lambda$ process.
Bydzovsky Petr
Dobashi Kazuhito
Endo Satoshi
Fujii Yasunori
Hashimoto Osamu
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