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1. The BGOOD experiment at ELSA, exotic structures in the light quark sector?

   https://doi.org/10.1051/epjconf/202430301015  

   Jude, Thomas; Braghieri, Alessandro; Cole, Philip; Elsner, Daniel; Di_Salvo, Rachele; Fantini, Alessia; Figueiredo, Antonio_Joao Clara; Freyermuth, Oliver; Fromberger, Frank; Ghio, Francesco; et al (January 2024, EPJ Web of Conferences)

   Hüsken, N; Danilkin, I; Hagelstein, F (Ed.)

   The BGOOD photoproduction experiment accesses forward meson angles and low momentum exchange kinematics in theudssector, which may be sensitive to molecular-like hadron structure. Recent results are presented, including strangeness photoproduction at forward meson angles, and π⁰π⁰coherent photoproduction off the deuteron. 

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2. The BGOOD experiment at ELSA, exotic structures in the light quark sector?

   https://doi.org/10.1051/epjconf/202429101004  

   Jude, Thomas; Braghieri, Alessandro; Cole, Philip; Eisner, Daniel; Di_Salvo, Rachele; Fantini, Alessia; Figueiredo, Antonio_Joao Clara; Freyermuth, Oliver; Fromberger, Frank; Ghio, Francesco; et al (January 2024, EPJ Web of Conferences)

   Lalik, R (Ed.)

   The BGOOD photoproduction experiment accesses forward meson angles and low momentum exchange kinematics in theudssector, which may be sensitive to molecular-like hadron structure. Recent results are presented, including strangeness photoproduction at forward meson angles, andπ⁰π⁰co herent photoproduction off the deuteron. 

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3. The BGOOD experiment at ELSA Exotic structures in the strange quark sector?

   https://doi.org/10.1051/epjconf/202227102007  

   Jude, Thomas; Alef, Stefan; Beck, Reinhard; Braghieri, Alessandro; Cole, Philip; Di Salvo, Rachele; Elsner, Daniel; Fantini, Alessia; Freyermuth, Oliver; Fromberger, Frank; et al (January 2022, EPJ Web of Conferences)

   Bielčíková, J.; Bydžovský, P.; Gazda, D.; Křížek, F.; Mareš, J.; Óbertová, J. (Ed.)

   The BGOOD photoproduction experiment accesses forward meson angles and low momentum exchange kinematics in the uds sector, which may be sensitive to molecular-like hadronic structure. Recent highlights are summarised in these proceedings. 

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

   https://doi.org/10.1051/epjconf/202024101014  

   Scheluchin, Georg; Alef, Stefan; Bauer, Patrick; Beck, Reinhard; Braghieri, Alessandro; Cole, Philip; Di Salvo, Rachele; Elsner, Daniel; Fantini, Alessia; Freyermuth, Oliver; et al (January 2020, EPJ Web of Conferences)

   Beck, R.; Thiel, A.; Thoma, U.; Wunderlich, Y. (Ed.)

   Since the discovery of the Λ(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 Λ(1405) can be produced in the reaction γp K + Λ(1405). The pure I=0 decay mode into Σ 0 π 0 is prohibited for the mass-overlapping Σ(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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5. Experimental study of the $$ \gamma p \rightarrow K^{0}\Sigma^{+}$$, $$ \gamma n \rightarrow K^{0} \Lambda$$, and $$ \gamma n \rightarrow K^{0} \Sigma^{0}$$ reactions at the Mainz Microtron

   https://doi.org/10.1140/epja/i2019-12924-x  

   Akondi, C. S.; Bantawa, K.; Manley, D. M.; Abt, S.; Achenbach, P.; Afzal, F.; Aguar-Bartolomé, P.; Ahmed, Z.; Annand, J. R.; Arends, H. J.; et al (November 2019, The European Physical Journal A)

   null (Ed.)

   Abstract. This work measured $$ \mathrm{d}\sigma/\mathrm{d}\Omega$$ d σ / d Ω for neutral kaon photoproduction reactions from threshold up to a c.m. energy of 1855MeV, focussing specifically on the $$ \gamma p\rightarrow K^0\Sigma^+$$ γ p → K 0 Σ + , $$ \gamma n\rightarrow K^0\Lambda$$ γ n → K 0 Λ , and $$ \gamma n\rightarrow K^0 \Sigma^0$$ γ n → K 0 Σ 0 reactions. Our results for $$ \gamma n\rightarrow K^0 \Sigma^0$$ γ n → K 0 Σ 0 are the first-ever measurements for that reaction. These data will provide insight into the properties of $$ N^{\ast}$$ N * resonances and, in particular, will lead to an improved knowledge about those states that couple only weakly to the $$ \pi N$$ π N channel. Integrated cross sections were extracted by fitting the differential cross sections for each reaction as a series of Legendre polynomials and our results are compared with prior experimental results and theoretical predictions. 

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