| Autor: |
Jude Thomas, Alef Stefan, Bauer Patrick, Beck Reinhard, Braghieri Alessandro, Cole Philip, Di Salvo Rachele, Elsner Daniel, Fantini Alessia, Freyermuth Oliver, Ghio Francesco, Gridnev Anatoly, Hammann Daniel, Hannappel Jürgen, Kohl Katrin, Kozlenko Nikolay, Lapik Alexander, Levi Sandri Paolo, Lisin Valery, Mandaglio Giuseppe, Messi Roberto, Moricciani Dario, Nedorezov Vladimir, Novinsky Dmitry, Pedroni Paolo, Polonski Andrei, Reitz Björn-Eric, Romaniuk Mariia, Scheluchin Georg, Schmieden Hartmut, Sumachev Victorin, Tarakanov Viacheslav, Tillmanns Christian |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 241, p 01008 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/202024101008 |
| Popis: |
The BGO-OD experiment at the ELSA accelerator facility uses an energy tagged bremsstrahlung photon beam to investigate the excitation structure of the nucleon. The setup consists of a highly segmented BGO calorimeter surrounding the target, with a particle tracking magnetic spectrometer at forward angles. BGO-OD is ideal for investigating low momentum transfer processes due to the acceptance and high momentum resolution at forward angles. In particular, this enables the investigation of strangeness photoproduction where t-channel exchange mechanisms play an important role. This also allows access to low momentum exchange kinematics where extended, molecular structure may manifest in reaction mechanisms. First key results at low t indicate a cusp-like structure in K+Σ0 photoproduction at W = 1900 MeV, line shapes and differential cross sections for K+Λ(1405)→ K+Σ0π0, and a peak structure in K0SΣ0 photoproduction. The peak in the K0SΣ0 channel appears consistent with meson-baryon generated states, where equivalent models have been used to describe the PC pentaquark candidates in the heavy charmed quark sector. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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