$K^+\Lambda$(1405) photoproduction at the BGO-OD experiment

Georg Scheluchin; Stefan Alef; Patrick Bauer; Reinhard Beck; Alessandro Braghieri; Philip Cole; Rachele Di Salvo; Daniel Elsner; Alessia Fantini; Oliver Freyermuth; Francesco Ghio; Anatoly Gridnev; Daniel Hammann; Jürgen Hannappel; Thomas Jude; Katrin Kohl; Nikolay Kozlenko; Alexander Lapik; Paolo Levi Sandri; Valery Lisin; Giuseppe Mandaglio; Roberto Messi; Dario Moricciani; Vladimir Nedorezov; Dmitry Novinsky; Paolo Pedroni; Andrei Polonski; Björn-Eric Reitz; Mariia Romaniuk; Hartmut Schmieden; Victorin Sumachev; Viacheslav Tarakanov; Christian Tillmanns

arXiv · 2007.08898

$K^+\Lambda$(1405) photoproduction at the BGO-OD experiment

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Abstract

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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Georg Scheluchin, Stefan Alef, Patrick Bauer, Reinhard Beck, Alessandro Braghieri, Philip Cole, Rachele Di Salvo, Daniel Elsner, Alessia Fantini, Oliver Freyermuth, Francesco Ghio, Anatoly Gridnev, Daniel Hammann, Jürgen Hannappel, Thomas Jude, Katrin Kohl, Nikolay Kozlenko, Alexander Lapik, Paolo Levi Sandri, Valery Lisin, Giuseppe Mandaglio, Roberto Messi, Dario Moricciani, Vladimir Nedorezov, Dmitry Novinsky, Paolo Pedroni, Andrei Polonski, Björn-Eric Reitz, Mariia Romaniuk, Hartmut Schmieden, Victorin Sumachev, Viacheslav Tarakanov, Christian Tillmanns. 2020-07-17. $K^+\Lambda$(1405) photoproduction at the BGO-OD experiment. https://arxiv.org/abs/2007.08898

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