Photoproduction of $K^{\ast +}\Lambda$ and $K^{+}\Sigma (1385)$ in the reaction $γ\lowercase{p} \to K^+ Λπ^0 $ at Jefferson Lab

Abstract

The search for missing nucleon resonances using coupled channel analysis has mostly been concentrated on $N\pi$ and $KY$ channels, while the contributions of $K^{\ast }Y$ and $K{Y}^{\ast }$ channels have not been investigated thoroughly mostly due to the lack of data. With an integrated luminosity of about 75 $p{b}^{-1}$, the photoproduction data using a proton target recently collected by the CLAS Collaboration at Jefferson Lab with a photon energy range of 1.5-3.8 GeV provided large statistics for the study of light hyperon photoproduction through exclusive reactions. The reaction $\gamma p\to K^{+}\Lambda {\pi }^0$ has been investigated. Preliminary results of the $K^{\ast +}\Lambda$ and $K^{+}\Sigma (1385)$ cross sections are not negligible compared with the $KY$ channels. The $\Lambda {\pi }^0$ invariant mass spectrum is dominated by the $\Sigma (1385)$ signal and no significant structure was found around the $\Sigma (1480)$ region.

arXiv comment4 pages, 3 figures, to be publised on the NSTAR05 proceedings

Cited by in corpus (1)

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