Studies of $γγ\toΛ\barΛ,Σ^0\bar{Σ^0}$ production at Belle

Details Studies of $γγ\toΛ\barΛ,Σ^0\bar{Σ^0}$ production at Belle Studies of $γγ\toΛ\barΛ,Σ^0\bar{Σ^0}$ production at Belle

2006-09-26

arxiv.org/abs/hep-ex/0609048v1

Physics

High Energy Physics

High Energy Physics - Experiment

16 pages, 8 figures, submitted to ICHEP06 Conference, Moscow, Russia

Scientific paper

Cross sections for hyperon pair production from two-photon collisions, $\gamma\gamma\to\Lambda\bar{\Lambda},\Sigma^0\bar{\Sigma^0}$, are measured in the 2-4 GeV energy region at Belle, using 464 fb$^{-1}$ of data. A contribution from the intermediate resonance $\eta_c(1S)$ is observed, and the products of the two-photon width of the $\eta_c(1S)$ and its branching ratios to $\Lambda\bar{\Lambda}$ and $\Sigma^0\bar{\Sigma^0}$ are measured. The results will help test QCD models.

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