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arxiv: 2007.08898 · v3 · pith:FEXZ3KOGnew · submitted 2020-07-17 · ⚛️ nucl-ex

K^+Λ(1405) photoproduction at the BGO-OD experiment

classification ⚛️ nucl-ex
keywords lambdabgo-oddecayexperimentforwardsigmaaperturecalorimeter
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Since the discovery of the $\Lambda(1405)$, it remains poorly described by conventional constituent quark models, and it is a candidate for having an "exotic" meson-baryon or "penta-quark" structure, similar to states recently reported in the hidden charm sector. The $\Lambda(1405)$ can be produced in the reaction $\gamma p \rightarrow K^+\Lambda(1405)$. The pure I=0 decay mode into $\Sigma^0\pi^0$ is prohibited for the mass-overlapping $\Sigma(1385)$. Combining a large aperture forward magnetic spectrometer and a central BGO crystal calorimeter, the BGO-OD experiment is ideally suited to measure this decay with the $K^+$ in the forward direction. Preliminary results are presented. *Supported by DFG (PN 388979758, 405882627).

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